博士, 理学

Functional solid state chemistry

Analytical chemistry

Fundamental physical chemistry

2025 - Present
Okayama University, Research Institute for Interdisciplinary Science, Professor

2022 - 2025
Okayama University, The Graduate School of Natural Science and Technology, Professor

2011 - 2017
JST/PRESTO

2010 - 2022
Toyota Technological Institute, Graduate School of Engineering, 准教授

2006 - 2006
Department of Chemical Physics of Fritz-Haber-Institut der・派遣研究員（兼任）

2003 - 2010
Hokkaido University, Catalysis Research Center, 助教

1999 - 2003
(財)神奈川科学技術アカデミー・極限表面反応プロジェクト・研究員

1998 - 1999
日本学術振興会・特別研究員・DC2 研究員(研究場所：東京工業大学)

1996 - 1999, Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering

1994 - 1996, Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering, 電子化学専攻修士課程

1990 - 1994, Tokyo University of Science, Faculty of Science, Division 1, 第一部・応用化学科

2025 - 2025
Conrefence Comittee, MRM2025（Materials Research Meeting 2025）

2024 - 2024
Contefence Comottee, International Symposium on Catalysis Chemistry Involving Light 2024

2024 - Present
幹事, 日本化学会：資源・エネルギー・地球化学・核化学・放射化学 ディビジョン

2024 - Present
Dupty Editor, J. Photochemistry and Photobiolgy C

2023 - 2023
実行委員長, 第42回光がかかわる触媒化学シンポジウム

2023 - Present
代議員, 触媒学会・西日本支部

2023 - 2025
世話人代表, 触媒学会「光触媒研究会」

2022 - 2024
主査, 日本化学会：資源・エネルギー・地球化学・核化学・放射化学 ディビジョン

2021 - 2024
Associate Editor, J. Photochemistry and Photobiolgy C

2020 - 2022
committee member, The Chemical Society of Japan, Division of Energy

2019 - 2019
Advisory Board, International Conference on Photochemistry and Sustainable Energy (ICPSE 2019)

2019 - 2019
Advisory Board, The 24th International Conference on Semiconductor Photocatalysis and Solar Energy Conversion (SPASEC-24)

2019 - 2019
Advisory Board, International Workshop on Crystalline Materials and Applications (IWCMA-2019)

2019 - 2019
committee member, Meeting of Japanese Photochemical Association, 2019

2017 - 2017
Advisory Board, International Conference on Photochemistry and Its Applications (ICPA 2017)

2017 - 2017
Advisory Board, The 22nd International Conference on Semiconductor Photocatalysis & Solar Energy Conversion (SPASEC-22)

2014 - Present
committee member, Catalysis Society of Japan, Board of Photocatalysis

2014 - 2022
committee member, The Japan Society of Vacuum and Surface Science

2011 - 2014
General affairs, The Surface Science Society of Japan, Chubu-Branch

2009 - Present
committee member, Catalysis Society of Japan, Board of Surface Science

2009 - 2009
executive committee, Surface Spectroscopy 2009

2004 - Present
committee member, The Electrochemical Society of Japan, Board of Nano-Surface

2004 - 2010
committee member, 電気化学会 北海道支部常任委員

2025
Chemical Society of Japan, The CSJ Award for Creative Work for 2025
Unraveling Fundamental Principles of Photocatalysis based on Charge Carrier Dynamics

2020
The Japanese Photochemistry Association, The Japanese Photochemistry Association Award
Development of novel transient absorption spectroscopy and reaction dynamics for highly efficient photocatalysis
Akira Yamakata

2020
豊田工業大学, 豊田奨学基金研究進歩賞
時間分解分光測定を利用した光触媒反応機構の解明
山方 啓

2018
豊田工業大学, 2018年度前期教育優秀賞 (受講者30人以上の部)
山方 啓

2018
International Congress on Pure & Applied Chemistry (ICPAC) 2018, Symposium Award
"Trapping-Induced Enhancement of Photocatalytic Activity on TiO2 Powders"
Akira Yamakata

2017
豊田工業大学, 2017年度前期教育優秀賞 (受講者30人以上の部)
山方 啓

2015
永井科学技術財団, H26年度永井科学技術財団学術賞
山方 啓

2014
豊田工業大学, 豊田奨学基金研究奨励賞
時間分解赤外分光法を用いた触媒表面反応の解析
山方 啓

2013
豊田工業大学, 2013年度前期教育優秀賞 (受講者30人以上の部)
山方 啓

2012
豊田工業大学, 2012年度前期教育優秀賞 (受講者30人以上の部)
山方 啓

2010
日本化学会北海道支部奨励賞
“赤外分光法を用いた表面反応機構の解明”, Japan
山方 啓

2009
日本分光学会奨励賞
“時間分解赤外分光法を用いた触媒表面反応ダイナミクス”, Japan
山方 啓

2004
日本表面科学会奨励賞
“時間分解赤外分光法を用いた二酸化チタン光触媒反応中間体の観察”, Japan
山方 啓

Substitution-dependent excited-state relaxation pathways in the TADF structural isomers MA-TA and mMA-TA
Kosaku Kato; Katsuaki Suzuki; Hironori Kaji; Akira Yamakata
The Journal of Chemical Physics, 165(10), Sep. 2026, Refereed, Invited
Corresponding

Two-dimensional metal–organic frameworks offer all-in-one cocatalysts for photocatalytic overall water splitting
Jingyan Guan; Hajime Suzuki; Kazuhide Kamiya; Takashi Harada; Rintaro Adachi; Osamu Tomita; Hirofumi Kurokawa; Daisuke Unabara; Koji Yonekura; Naoya Fukui; Hiroaki Maeda; Kunihisa Sugimoto; Yuichi Yamaguchi; Akinori Saeki; Akira Yamakata; Akihiko Kudo; Ryu Abe; Ryota Sakamoto
Nature Chemistry, Apr. 2026, Refereed

Shallow Hole Trapping and Intrinsic Defect Tolerance in Visible-Light Photocatalysts: The Role of Lattice Relaxation and Electronic Screening
Akira Yamakata; Junie Jhon M. Vequizo; Kazunari Domen
Journal of the American Chemical Society, Apr. 2026, Refereed
Lead, Corresponding

Mg-Doped Nanosized BaTaO ₂ N with Long-Lived Charge Carriers toward Efficient Overall Water Splitting
Jing Wang; Jiadong Xiao; Junie Jhon M. Vequizo; Takashi Hisatomi; Mamiko Nakabayashi; Wenpeng Li; Daling Lu; Jingshuai Chen; Naoya Shibata; Akira Yamakata; Kazunari Domen
Journal of the American Chemical Society, 148(13), 14680-14688, Mar. 2026, Refereed

Two-Step Growth of Layered Perovskite Y2Ti2O5S2 Yields Faceted Crystals with Controlled Size and Morphology
Masaki Moriwaki; Atsushi Miyauchi; Fumitaka Hayashi; Hiroh Miyagawa; Mamiko Nakabayashi; Shintaro Kobayashi; Shogo Kawaguchi; Ai Takami; Akira Yamakata; Shintaro Abe; Takashi Hisatomi; Tetsuya Yamada; Katsuya Teshima
The Journal of Physical Chemistry C, Mar. 2026, Refereed

Ultrafast Charge Transfer and Long-Lived Charge Separation in Covalently Linked MoS2–Pyrene–Phenothiazine Heterojunction Monolayers
Motohisa Kubota; Midori Akiyama; W. Ryan Osterloh; Masahiro Higashi; Masaaki Fuki; Akira Yamakata; Yasuhiro Kobori; Hiroshi Imahori
Journal of the American Chemical Society, Feb. 2026, Refereed
Corresponding

Manipulating Charge‐Transfer and Charge‐Separated States Through Solvent Effects and Excited‐State Vibrations in a Phenothiazine‐Porphyrin‐Naphthalenediimide Triad
Midori Akiyama; Nami Tanaka; W. Ryan Osterloh; Masahiro Higashi; Hikaru Sotome; Akira Yamakata; Hiroshi Imahori
ChemPlusChem, Feb. 2026, Refereed
Corresponding

Facet-engineered SrTiO3:Rh via solid-state ionic doping for efficient Z-scheme overall water splitting
Haolin Luo; Junie Jhon M. Vequizo; Zhen Ye; Feng Han; Jiasheng Chi; Jiawei Yan; Akira Yamakata; Wenfeng Shangguan; Zhi Jiang
Journal of Catalysis, 453, 116551-116551, Jan. 2026, Refereed

Pd composition and dispersion control selectivity in photocatalytic methane oxidation
Jiawei Wu; Hu Ding; Yan Wang; Ulfi Muliane; Shuji Anabuki; Naoya Murakami; Xinli Zhu; Akira Yamakata; Teruhisa Ohno; Shi Nee Lou
Journal of Materials Chemistry A, 2026, Refereed

Dual doping-induced gradient charge polarization in a single non-centrosymmetric photocatalyst for efficient hydrogen production and organic oxidation
Joshua Jia Ler Lu; Jia-Fong Lau; Chee Yan Loh; Lutfi Kurnianditia Putri; Xin Ying Kong; Yi-Hao Chew; W.P. Cathie Lee; Chuan Yi Foo; Choon-Yian Haw; Akira Yamakata; Boon-Junn Ng; Siang-Piao Chai
Materials Today Energy, 54, 102085-102085, Dec. 2025, Refereed

Azaanthraquinone PCET Catalysis Enables Chemoselective Decarboxylative Functionalization of Diverse Carboxylic Acids
Takeshi Inoue; Daiki Tomiya; Masaaki Fuki; Yasuhiro Kobori; Masahiro Higashi; Kaito Uesaka; Akira Yamakata; Shigehiro A. Kawashima; Kenzo Yamatsugu; Harunobu Mitsunuma; Motomu Kanai
Journal of the American Chemical Society, 147(44), 40272-40281, Oct. 2025, Refereed

Efficient and stable n-type sulfide overall water splitting with separated hydrogen production
Haolin Luo; Zhixi Liu; Haifeng Lv; Junie Jhon M. Vequizo; Mengting Zheng; Feng Han; Zhen Ye; Akira Yamakata; Wenfeng Shangguan; Adam F. Lee; Xiaojun Wu; Domen Kazunari; Jun Lu; Zhi Jiang
Nature Communications, 16(1), Oct. 2025, Refereed

Flux-Assisted Syntheses of Calcium Titanate Powders Codoped with Aluminum, Scandium, and Magnesium for Efficient Photocatalytic Overall Water Splitting
Kaori Takagi; Tomoya Ota; Kota Kato; Ryota Tomizawa; Tomoya Nagano; Koji Hayashi; Akira Yamakata; Yoshitaro Nose; Nobuya Machida; Shigeru Ikeda
ACS Applied Energy Materials, 8(16), 11961-11969, Aug. 2025, Refereed

Mesoporous Oxyhalide Aggregates Exhibiting Improved Photocatalytic Activity for Visible-Light H₂ Evolution and CO₂ Reduction
Hiroto Ueki; Toshiya Tanaka; Shuji Anabuki; Ryuichi Nakada; Megumi Okazaki; Kenta Aihara; Masashi Hattori; Fumitaka Ishiwari; Rie Haruki; Shunsuke Nozawa; Toshiyuki Yokoi; Michikazu Hara; Osamu Ishitani; Akinori Saeki; Akira Yamakata; Kazuhiko Maeda
ACS Catalysis, 15(14), 12551-12562, Jul. 2025, Refereed

Interface Engineering between Photocatalyst and Cocatalyst: A Strategy for Enhancing Interfacial Charge Transfer and Water Oxidation of Layered Oxyhalides
Hajime Suzuki; Kengo Minamimoto; Yusuke Ishii; Osamu Tomita; Akinobu Nakada; Shunsuke Nozawa; Akira Yamakata; Ryu Abe
Journal of the American Chemical Society, 147(26), 22892-22900, Jun. 2025, Refereed

Molecular-Level Tailoring of Energy Structure in Ternary Conjugated Polymers with a Built-in Ru-Complex Catalyst for Efficient CO₂ Reduction Photocatalysis
Kotaro Ishihara; Akinobu Nakada; Hajime Suzuki; Akira Yamakata; Osamu Tomita; Akinori Saeki; Ryu Abe
Journal of the American Chemical Society, 147(24), 20759-20769, Jun. 2025, Refereed

Boosted Photocatalytic Water Oxidation over BaTaO₂N Produced from Perovskite Oxides Based on Photoinduced Charge Carriers
Junie Jhon M. Vequizo; Kosaku Kato; Shanshan Chen; Takashi Hisatomi; Zheng Wang; Tsuyoshi Takata; Akira Yamakata; Kazunari Domen
Energy & Fuels, 39(13), 6584-6591, Mar. 2025, Refereed

Effects of Metal-Cation Doping on Photocatalytic H₂ Evolution Activity of Layered Perovskite Oxynitride K₂LaTa₂O₆N
Hideya Tsuchikado; Shuji Anabuki; Ovidiu Cretu; Yuki Kinoshita; Masashi Hattori; Yuta Shiroma; Dongxiao Fan; Megumi Okazaki; Takuto Soma; Fumitaka Ishiwari; Shunsuke Nozawa; Toshiyuki Yokoi; Michikazu Hara; Koji Kimoto; Akira Yamakata; Akinori Saeki; Kazuhiko Maeda
ACS Applied Energy Materials, 8(6), 3541-3552, Mar. 2025, Refereed

Conduction Band and Defect Engineering for the Prominent Visible‐Light Responsive Photocatalysts
Akira Yamakata; Kosaku Kato; Takafumi Ogawa; Kanta Ogawa; Makoto Ogawa; Daichi Kato; Chengchao Zhong; Akihide Kuwabara; Ryu Abe; Hiroshi Kageyama
Angewandte Chemie International Edition, 64(13), e202419624, Jan. 2025, Refereed
Lead, Corresponding

Catalytic acceptorless complete dehydrogenation of cycloalkanes
Rahul A. Jagtap; Yuki Nishioka; Stephen M. Geddis; Yu Irie; Tsukasa Takanashi; Rintaro Adachi; Akira Yamakata; Masaaki Fuki; Yasuhiro Kobori; Harunobu Mitsunuma; Motomu Kanai
Nature Communications, 16(1), 1-7, Jan. 2025, Refereed

Activation of barium titanate for photocatalytic overall water splitting via low-valence cation codoping
Shigeru Ikeda; Kaori Takagi; Ryota Tomizawa; Tomoya Nagano; Koji Hayashi; Akira Yamakata; Yoshitaro Nose
Sustainable Energy & Fuels, 9(24), 6665-6671, 2025, Refereed

A meta-linked isomer of ITIC: influence of aggregation patterns on open-circuit voltage in organic solar cells
Kai Wang; Seihou Jinnai; Kaito Uesaka; Akira Yamakata; Yutaka Ie
Journal of Materials Chemistry A, 13(23), 17720-17729, 2025, Refereed
Corresponding

Designing and Understanding Biphasic TiO₂ Composites for a Long-Lasting Photocatalytic Air Purification
Ulfi Muliane; Shi Nee Lou; Shinbi Lee; Fei He; Shen Zhao; Kosaku Kato; Akira Yamakata; Wonyong Choi
ACS ES&T Engineering, 5(4), 942-952, Dec. 2024, Refereed

Zeolite-decorated black TiOx quantum dots for photocatalytic degradation of organic cationic dyes under LED light irradiation
Mohammad Rahim Pour; Mohammad Fereidooni; Supareak Praserthdam; Piyasan Praserthdam; Victor Marquez; Kaito Uesaka; Akira Yamakata; C.V. Paz; Nattawut kamjam; Pongsakorn kanjanaboos
Journal of Alloys and Compounds, 1008, 176797-176797, Dec. 2024, Refereed

Surface Modifications of Layered Perovskite Oxysulfide Photocatalyst Y₂Ti₂O₅S₂ to Enhance Visible‐Light‐Driven Water Splitting
Xizhuang Liang; Junie Jhon M. Vequizo; Lihua Lin; Xiaoping Tao; Qiulian Zhu; Mamiko Nakabayashi; Daling Lu; Hiroaki Yoshida; Akira Yamakata; Takashi Hisatomi; Tsuyoshi Takata; Kazunari Domen
Advanced Science, 12(3), 2412326, Nov. 2024, Refereed

Simultaneous Structural and Electronic Engineering on Bi‐ and Rh‐co‐doped SrTiO₃ for Promoting Photocatalytic Water Splitting
Zhenhua Pan; Junie Jhon M. Vequizo; Hiroaki Yoshida; Jianuo Li; Xiaoshan Zheng; Chiheng Chu; Qian Wang; Mengdie Cai; Song Sun; Kenji Katayama; Akira Yamakata; Kazunari Domen
Angewandte Chemie, 137(2), Oct. 2024

Simultaneous Structural and Electronic Engineering on Bi‐ and Rh‐co‐doped SrTiO₃ for Promoting Photocatalytic Water Splitting
Zhenhua Pan; Junie Jhon M. Vequizo; Hiroaki Yoshida; Jianuo Li; Xiaoshan Zheng; Chiheng Chu; Qian Wang; Mengdie Cai; Song Sun; Kenji Katayama; Akira Yamakata; Kazunari Domen
Angewandte Chemie International Edition, 64(2), e202414628, Oct. 2024, Refereed

Nonfullerene Acceptors Bearing Spiro-Substituted Bithiophene Units in Organic Solar Cells: Tuning the Frontier Molecular Orbital Distribution to Reduce Exciton Binding Energy.
Kai Wang; Seihou Jinnai; Takumi Urakami; Hirofumi Sato; Masahiro Higashi; Sota Tsujimura; Yasuhiro Kobori; Rintaro Adachi; Akira Yamakata; Yutaka Ie
Angewandte Chemie (International ed. in English), e202412691, Aug. 2024, Refereed

Development of Non-Fullerene Acceptors with π-Extended Central Unit for Organic Photovoltaic Devices
Tomokazu Umeyama; Motohisa Kubota; Haoxuan Zhang; Rintaro Adachi; Akira Yamakata; Tomoyuki Koganezawa; Hiroshi Imahori
Journal of Photopolymer Science and Technology, 37(2), 197-204, Jun. 2024, Refereed

Atomically dispersed low-valent Au boosts photocatalytic hydroxyl radical production
Zhenyuan Teng; Hongbin Yang; Qitao Zhang; Wenan Cai; Ying-Rui Lu; Kosaku Kato; Zhenzong Zhang; Jie Ding; Han Sun; Sixiao Liu; Chengyin Wang; Peng Chen; Akira Yamakata; Ting-Shan Chan; Chenliang Su; Teruhisa Ohno; Bin Liu
Nature Chemistry, 16(8), 1250-1260, Jun. 2024, Refereed

Double‐Hollow Au@CdS Yolk@Shell Nanostructures as Superior Plasmonic Photocatalysts for Solar Hydrogen Production
Yi‐An Chen; Yuhi Nakayasu; Yu‐Chang Lin; Jui‐Cheng Kao; Kai‐Chi Hsiao; Quang‐Tuyen Le; Kao‐Der Chang; Ming‐Chung Wu; Jyh‐Pin Chou; Chun‐Wei Pao; Tso‐Fu Mark Chang; Masato Sone; Chun‐Yi Chen; Yu‐Chieh Lo; Yan‐Gu Lin; Akira Yamakata; Yung‐Jung Hsu
Advanced Functional Materials, 34(46), 2402392, Jun. 2024, Refereed
Corresponding

Carbon Nanotubes as a Solid-State Electron Mediator for Visible-Light-Driven Z-Scheme Overall Water Splitting
Lihua Lin; Yiwen Ma; Nobuyuki Zettsu; Junie Jhon M. Vequizo; Chen Gu; Akira Yamakata; Takashi Hisatomi; Tsuyoshi Takata; Kazunari Domen
Journal of the American Chemical Society, 146(21), 14829-14834, May 2024, Refereed

Trapping of Intermediates of a Photocatalytic Oxygen Evolution Reaction in Overall Water Splitting
Fumiaki Amano; Satoshi Nakayama; Souta Suzuki; Akira Yamakata; Kosuke Beppu
ACS Applied Energy Materials, 7(4), 1398-1402, Feb. 2024, Refereed

Suppression of Charge Recombination by Vertical Arrangement of A Donor Moiety on Flat Planar Dyes for Efficient Dye‐Sensitized Solar Cells
Qi Guo; Tomohiro Higashino; Rintaro Adachi; Chayanit Wechwithayakhlung; Daniel Packwood; Akira Yamakata; Hiroshi Imahori
ChemSusChem, 17(9), e202301661, Jan. 2024, Refereed
Corresponding

Efficient and stable visible-light-driven Z-scheme overall water splitting using an oxysulfide H2 evolution photocatalyst
Lihua Lin; Yiwen Ma; Junie Jhon M. Vequizo; Mamiko Nakabayashi; Chen Gu; Xiaoping Tao; Hiroaki Yoshida; Yuriy Pihosh; Yuta Nishina; Akira Yamakata; Naoya Shibata; Takashi Hisatomi; Tsuyoshi Takata; Kazunari Domen
Nature Communications, 15(1), 397, Jan. 2024, Refereed

Boosting charge separation in organic photovoltaics: unveiling dipole moment variations in excited non-fullerene acceptor layers
Akira Yamakata; Kosaku Kato; Takumi Urakami; Sota Tsujimura; Kasumi Murayama; Masahiro Higashi; Hirofumi Sato; Yasuhiro Kobori; Tomokazu Umeyama; Hiroshi Imahori
Chemical Science, 15(32), 12686-12694, 2024, Refereed
Lead, Corresponding

Activation of Nonoxide Photocatalyst Sheet Operable under Visible Light Irradiation up to 600 nm by Conductive Bilayer
Swarnava Nandy; Hiroka Sandaiji; Shuji Sekimori; Junie Jhon M. Vequizo; Rhauane Almeida Galvão; Natsutogi Iwasa; Swapnil S. Karade; Mamiko Nakabayashi; Tsuyoshi Takata; Takashi Hisatomi; Akira Yamakata; Kazunari Domen
ACS Energy Letters, 4708-4714, 2024, Refereed

An efficient particulate photocatalyst for overall water splitting based on scandium and magnesium co-doped strontium titanate
Shigeru Ikeda; Riku Okamoto; Akira Kimura; Yuhi Nakayasu; Akira Yamakata; Ryota Tomizawa; Taizo Masuda; Koichiro Nakatani
Sustainable Energy & Fuels, 8(2), 202-209, 2024, Refereed

Sub-50 nm perovskite-type tantalum-based oxynitride single crystals with enhanced photoactivity for water splitting
Jiadong Xiao; Mamiko Nakabayashi; Takashi Hisatomi; Junie Jhon M. Vequizo; Wenpeng Li; Kaihong Chen; Xiaoping Tao; Akira Yamakata; Naoya Shibata; Tsuyoshi Takata; Yasunobu Inoue; Kazunari Domen
Nature Communications, 14(1), 8030, Dec. 2023, Refereed

A Quantitative Study on the Relationship of Specific Surface Area and Carrier Lifetime to Photocatalytic Activity of Anatase TiO₂ Nanoparticles
Shimpei Naniwa; Kosaku Kato; Akira Yamakata; Akira Yamamoto; Hisao Yoshida
ACS Catalysis, 13(22), 15212-15218, Nov. 2023, Refereed
Corresponding

Photocatalytic Hydrogen Evolution Activity of Nitrogen/Fluorine-Codoped Rutile TiO₂
Akinobu Miyoshi; Megumi Okazaki; Kosaku Kato; Tomoki Kanazawa; Toshiyuki Yokoi; Shunta Nishioka; Shunsuke Nozawa; Akira Yamakata; Kazuhiko Maeda
ACS Omega, 8(44), 41809-41815, Oct. 2023, Refereed

In situ surface-enhanced infrared absorption analysis of the excited carrier transfer from n-type Si photoelectrode to Pt oxygen evolution cocatalyst by probing adsorbed CO molecules
Shu Ashimura; Reiya Konaka; Taki Suginaga; Kazuki Harada; Akira Yamakata; Chechia Hu; Hepsiba Niruba Catherine; Ke-Hsuan Wang; Takeshi Kawai; Masaaki Yoshida
Journal of the Taiwan Institute of Chemical Engineers, 105121-105121, Sep. 2023, Refereed

Unfolding the Impact of H2-Reduction Treatment in Enhancing the Photocatalytic Activity of Rutile TiO2 Based on Photocarriers Dynamics
Junie Jhon M. Vequizo; Kosaku Kato; Fumiaki Amano; Akira Yamakata
Journal of Physical Chemistry C, 127(22), 10411-10418, Jun. 2023, Refereed, Invited
Corresponding

Metal Single‐Atom Cocatalyst on Carbon Nitride for the Photocatalytic Hydrogen Evolution Reaction: Effects of Metal Species
Yuki Akinaga; Tokuhisa Kawawaki; Hinano Kameko; Yuki Yamazaki; Kenji Yamazaki; Yuhi Nakayasu; Kosaku Kato; Yuto Tanaka; Adie Tri Hanindriyo; Makito Takagi; Tomomi Shimazaki; Masanori Tachikawa; Akira Yamakata; Yuichi Negishi
Advanced Functional Materials, 33(33), 2303321, May 2023, Refereed

Improved Photocatalytic O2 Evolution on a Sillén–Aurivillius Perovskite Oxychloride Bi6NbWO14Cl by Rh2O3 Additives and Surface Modifications
Hajime Suzuki; Takanori Takashima; Osamu Tomita; Tomoki Kanazawa; Shunsuke Nozawa; Kosaku Kato; Akira Yamakata; Kouichi Nakashima; Akinori Saeki; Ryu Abe
The Journal of Physical Chemistry C, 127(17), 7965-7973, May 2023, Refereed, Invited

Carbon Nitride Loaded with an Ultrafine, Monodisperse, Metallic Platinum‐Cluster Cocatalyst for the Photocatalytic Hydrogen‐Evolution Reaction
Daichi Yazaki; Tokuhisa Kawawaki; Daisuke Hirayama; Masanobu Kawachi; Kosaku Kato; Sota Oguchi; Yuichi Yamaguchi; Soichi Kikkawa; Yoshiya Ueki; Sakiat Hossain; D. J. Osborn; Fumihiko Ozaki; Shunsuke Tanaka; Jun Yoshinobu; Gregory F. Metha; Seiji Yamazoe; Akihiko Kudo; Akira Yamakata; Yuichi Negishi
Small, 19(34), 2208287, Apr. 2023, Refereed

Synthesis of crystal-phase and color tunable mixed anion co-doped titanium oxides and their controllable photocatalytic activity
Jingdi Cao; Takuya Hhasegawa; Yusuke Asakura; Akira Yamakata; Peng Sun; Wenbin Cao; Shu Yin
International Journal of Minerals, Metallurgy and Materials, 30(10), 2036-2043, Apr. 2023, Refereed

Asymmetrically coordinated cobalt single atom on carbon nitride for highly selective photocatalytic oxidation of CH4 to CH3OH
Jie Ding; Zhenyuan Teng; Xiaozhi Su; Kosaku Kato; Yuhang Liu; Ting Xiao; Wei Liu; Lingyue Liu; Qiao Zhang; Xinyi Ren; Jincheng Zhang; Zhaoyang Chen; Ohno Teruhisa; Akira Yamakata; Hongbin Yang; Yanqiang Huang; Bin Liu; Yueming Zhai
Chem, 9(4), 1017-1035, Apr. 2023, Refereed

Surface-Specific Modification of Graphitic Carbon Nitride by Plasma for Enhanced Durability and Selectivity of Photocatalytic CO2 Reduction with a Supramolecular Photocatalyst
Noritaka Sakakibara; Mitsuhiko Shizuno; Tomoki Kanazawa; Kosaku Kato; Akira Yamakata; Shunsuke Nozawa; Tsuyohito Ito; Kazuo Terashima; Kazuhiko Maeda; Yusuke Tamaki; Osamu Ishitani
ACS Applied Materials & Interfaces, 15, 13025-13218, Mar. 2023, Refereed

Particle Size Dependent Trap States of Photoexcited Carriers in Anatase TiO2 Nanoparticles
Shimpei Naniwa; Kosaku Kato; Akira Yamamoto; Hisao Yoshida; Akira Yamakata
The Journal of Physical Chemistry C, 127(8), 4295-4302, Mar. 2023, Refereed, Invited
Corresponding

Promoted Utilization of Charge Carriers in La₅Ti₂Cu_0.9Ag_0.1O₇S₅-Based Photocatalyst Sheets for Efficient Z-Scheme Overall Water Splitting
Shanshan Chen; Swarnava Nandy; Junie Jhon M. Vequizo; Takashi Hisatomi; Mamiko Nakabayashi; Zhenhua Pan; Qi Xiao; Zheng Wang; Lihua Lin; Song Sun; Kosaku Kato; Akira Yamakata; Naoya Shibata; Tsuyoshi Takata; Fuxiang Zhang; Kazunari Domen
ACS Catalysis, 13(5), 3285-3294, Feb. 2023, Refereed

Overall Water Splitting by a SrTaO₂N-Based Photocatalyst Decorated with an Ir-Promoted Ru-Based Cocatalyst
Kaihong Chen; Jiadong Xiao; Junie Jhon M. Vequizo; Takashi Hisatomi; Yiwen Ma; Mamiko Nakabayashi; Tsuyoshi Takata; Akira Yamakata; Naoya Shibata; Kazunari Domen
Journal of the American Chemical Society, 145(7), 3839-3843, Jan. 2023, Refereed

Zr-doped BaTaO₂N photocatalyst modified with Na–Pt cocatalyst for efficient hydrogen evolution and Z-scheme water splitting
Huihui Li; Junie Jhon M. Vequizo; Takashi Hisatomi; Mamiko Nakabayashi; Jiadong Xiao; Xiaoping Tao; Zhenhua Pan; Wenpeng Li; Shanshan Chen; Zheng Wang; Naoya Shibata; Akira Yamakata; Tsuyoshi Takata; Kazunari Domen
EES Catalysis, 1, 26-35, Jan. 2023, Refereed

An emissive charge-transfer excited-state at the well-defined hetero-nanostructure interface of an organic conjugated molecule and two-dimensional inorganic nanosheet
Tomokazu Umeyama; Daizu Mizutani; Yuki Ikeda; W. Ryan Osterloh; Futa Yamamoto; Kosaku Kato; Akira Yamakata; Masahiro Higashi; Takumi Urakami; Hirofumi Sato; Hiroshi Imahori
Chemical Science, 14(42), 11914-11923, 2023, Refereed
Corresponding

Co-doping of a La₅Ti₂Cu_0.9Ag_0.1O₇S₅ photocatalyst (λ < 700 nm) with Ga and Al to enhance photocatalytic H₂ evolution
Xiaojun Wang; Zhenhua Pan; Junie Jhon M. Vequizo; Takashi Hisatomi; Swarnava Nandy; Tomohiro Higashi; Lihua Lin; Jiadong Xiao; Tsuyoshi Takata; Akira Yamakata; Wei Yan; Kazunari Domen
Chemical Communications, 59(45), 6913-6916, 2023, Refereed

An unexplored role of the CrO_x shell in an elaborated Rh/CrO_x core–shell cocatalyst for photocatalytic water splitting: a selective electron transport pathway from semiconductors to core metals, boosting charge separation and H₂ evolution
Tetsu Kotani; Kanta Ogawa; Hajime Suzuki; Kosaku Kato; Osamu Tomita; Akira Yamakata; Ryu Abe
EES Catalysis, 1(3), 255-262, 2023, Refereed

Active BaTaO2N Photocatalysts Prepared from Amorphous Ta2O5 Precursor for Overall Water Splitting under Visible Light
Shinji Nishimae; Junie Jhon M. Vequizo; Yasunobu Inoue; Akira Yamakata; Mamiko Nakabayashi; Tomohiro Higashi; Kazunari Domen
Journal of Materials Chemistry A, 11, 6299-6310, 2023, Refereed

A general interfacial-energetics-tuning strategy for enhanced artificial photosynthesis
Tian Liu; Zhenhua Pan; Kosaku Kato; Junie Jhon M. Vequizo; Rito Yanagi; Xiaoshan Zheng; Weilai Yu; Akira Yamakata; Baoliang Chen; Shu Hu; Kenji Katayama; Chiheng Chu
Nature Communications, 13(1), 7783, Dec. 2022, Refereed

Harnessing infrared solar energy with plasmonic energy upconversion (Oct, 10.1038/s41893-022-01015-2, 2022)
Zichao Lian; Yoichi Kobayashi; Junie Jhon M. Vequizo; Chandana Sampath Kumara Ranasinghe; Akira Yamakata; Takuro Nagai; Koji Kimoto; Katsuaki Kobayashi; Koji Tanaka; Toshiharu Teranishi; Masanori Sakamoto
NATURE SUSTAINABILITY, 5, 1092-1099, Nov. 2022, Refereed

Effects of Hydroxy Groups in Anthraquinone Dyes on Photocatalytic Activity of Visible-light-sensitized Pt-TiO2 for Hydrogen Evolution
Fumiaki Amano; Yasukazu Akaki; Akira Yamakata
Catalysis Surveys from Asia, 27(1), 75-83, Oct. 2022, Refereed
Last

固体表面の動力学に追る時間分解中赤外分光
山方啓; 加藤康作
光学, 51, 448-454, Oct. 2022, Refereed, Invited
Lead, Corresponding

Effects of a Nanoparticulate TiO2 Modifier on the Visible-Light CO2 Reduction Performance of a Metal-Complex/Semiconductor Hybrid Photocatalyst
Mitsuhiko Shizuno; Kosaku Kato; Shunta Nishioka; Tomoki Kanazawa; Daiki Saito; Shunsuke Nozawa; Akira Yamakata; Osamu Ishitani; Kazuhiko Maeda
ACS Applied Energy Materials, 5(8), 9479-9486, Aug. 2022, Refereed

One-Step Excitation Overall Water Splitting over a Modified Mg-Doped BaTaO2N Photocatalyst
Huihui Li; Jiadong Xiao; Junie Jhon M. Vequizo; Takashi Hisatomi; Mamiko Nakabayashi; Zhenhua Pan; Naoya Shibata; Akira Yamakata; Tsuyoshi Takata; Kazunari Domen
ACS Catalysis, 12(16), 10179-10185, Aug. 2022, Refereed

Effect of Surface Plasmon Resonance and the Heterojunction on Photoelectrochemical Activity of Metal-Loaded TiO2 Electrodes under Visible Light Irradiation
Chia-Yu Chang; Akira Yamakata; Wenjea J. Tseng
The Journal of Physical Chemistry C, 126, 12450-12459, Aug. 2022, Refereed

Eliciting the contribution of TiN to photoelectrochemical performance enhancement of Imma-LaTiO2N at neutral pH
Mirabbos Hojamberdiev; Juan Manuel Mora-Hernandez; Ronald Vargas; Eva Maria Heppke; Kunio Yubuta; Akira Yamakata; Zukhra Kadirova; Leticia Torres-Martinez; Katsuya Teshima; Martin Lerch
MATERIALS TODAY ENERGY, 27, Jul. 2022, Refereed, Invited

Role of Oxygen Vacancy in the Photocarrier Dynamics of WO3 Photocatalysts: The Case of Recombination Centers
Kosaku Kato; Yohei Uemura; Kiyotaka Asakura; Akira Yamakata
The Journal of Physical Chemistry C, 126(22), 9257-9263, Jun. 2022, Refereed

Enhanced Overall Water Splitting by a Zirconium‐Doped TaON‐Based Photocatalyst
Jiadong Xiao; Shinji Nishimae; Junie Jhon M. Vequizo; Mamiko Nakabayashi; Takashi Hisatomi; Huihui Li; Lihua Lin; Naoya Shibata; Akira Yamakata; Yasunobu Inoue; Kazunari Domen
Angewandte Chemie International Edition, 61(17), Apr. 2022, Refereed

Identification of a Self-Photosensitizing Hydrogen Atom Transfer Organocatalyst System.
Hiromu Fuse; Yu Irie; Masaaki Fuki; Yasuhiro Kobori; Kosaku Kato; Akira Yamakata; Masahiro Higashi; Harunobu Mitsunuma; Motomu Kanai
Journal of the American Chemical Society, 144(14), 6566-6574, Apr. 2022, Refereed

時間分解分光計測を利用した光触媒反応機構の解明
山方啓
分光研究, 71, 75-89, Apr. 2022, Refereed, Invited
Lead, Corresponding

Donor-π-Acceptor Type Porphyrin-Fullerene Dyad with Acetylene Bridge for p-Type Dye-sensitized Solar Cell
Qi Guo; Tomohiro Higashino; Kosaku Kato; Akira Yamakata; Hiroshi Imahori
Chemistry Letters, 51(3), 260-263, Feb. 2022, Refereed
Corresponding

Manipulation of charge carrier flow in Bi4NbO8Cl nanoplate photocatalyst with metal loading
Kanta Ogawa; Ryota Sakamoto; Chengchao Zhong; Hajime Suzuki; Kosaku Kato; Osamu Tomita; Kouichi Nakashima; Akira Yamakata; Takashi Tachikawa; Akinori Saeki; Hiroshi Kageyama; Ryu Abe
Chemical Science, 13(11), 3118-3128, Jan. 2022, Refereed

Unfolding the Role of B Site-Selective Doping of Aliovalent Cations on Enhancing Sacrificial Visible Light-Induced Photocatalytic H2 and O2 Evolution over BaTaO2N
Mirabbos Hojamberdiev; Ronald Vargas; Zukhra C. Kadirova; Kosaku Kato; Hadi Sena; Aleksei G. Krasnov; Akira Yamakata; Katsuya Teshima; Martin Lerch
ACS Catalysis, 12(2), 1403-1414, Jan. 2022, Refereed

Overall photosynthesis of H2O2 by an inorganic semiconductor
Pan Zhenhua; Junie Jhon; M. Vequizo; Kosaku Kato; Akira Yamakata; Kenji Katayama; Chiheng Chu; Kazunari Domen
Nature Communications, 13(1), Jan. 2022, Refereed

Unfolding the Role of B Site-Selective Doping of Aliovalent Cations on Enhancing Sacrificial Visible Light-Induced Photocatalytic H₂ and O₂ Evolution over BaTaO₂N
Akira Yamakata
ACS Catalysis, 2022

Harnessing infrared solar energy with plasmonic energy upconversion
Akira Yamakata
Nature Sustainability, 2022

One-Step Excitation Overall Water Splitting over a Modified Mg-Doped BaTaO2N Photocatalyst
Akira Yamakata
ACS Catalysis, 2022

Photoexcited charge manipulation in conjugated polymers bearing a Ru(ii) complex catalyst for visible-light CO2 reduction
Akinobu Nakada; Ryuichi Miyakawa; Ren Itagaki; Kosaku Kato; Chinami Takashima; Akinori Saeki; Akira Yamakata; Ryu Abe; Hiromi Nakai; Ho-Chol Chang
Journal of Materials Chemistry A, 10(37), 19821-19828, 2022, Refereed, Invited

Effects of the rigid and sterically bulky structure of non-fused nonfullerene acceptors on transient photon-to-current dynamics
Seihou Jinnai; Kasumi Murayama; Keisuke Nagai; Megumi Mineshita; Kosaku Kato; Azusa Muraoka; Akira Yamakata; Akinori Saeki; Yasuhiro Kobori; Yutaka Ie
Journal of Materials Chemistry A, 10(37), 20035-20047, 2022, Refereed

Influences of pulverization and annealing treatment on the photocatalytic activity of BiVO₄ for oxygen evolution
Kazuya Okuno; Hiromu Kumagai; Junie Jhon M. Vequizo; Kosaku Kato; Makoto Kobayashi; Akira Yamakata; Masato Kakihana; Hideki Kato
Sustainable Energy & Fuels, 6(7), 1698-1707, 2022, Refereed

Improvement of Visible‐Light H2 Evolution Activity of Pb2Ti2O5.4F1.2 Photocatalyst by Coloading of Rh and Pd Cocatalysts
Kenta Aihara; Kosaku Kato; Tomoki Uchiyama; Shuhei Yasuda; Toshiyuki Yokoi; Akira Yamakata; Yoshiharu Uchimoto; Kazuhiko Maeda
Chemistry - A European Journal, 28(43), 2022, Refereed

Effect of Terminal-Group Halogenation of Naphthalene-Based Nonfullerene Acceptors on Their Film Structure and Photophysical and Photovoltaic Properties
Tomokazu Umeyama; Tatsuho Wada; Kensho Igarashi; Kosaku Kato; Akira Yamakata; Taiki Takeyama; Yuji Sakamoto; Yasunari Tamai; Hideo Ohkita; Keiichi Ishida; Tomoyuki Koganezawa; Shunsuke Ohtani; Kazuo Tanaka; Hiroshi Imahori
ACS Applied Energy Materials, 4(12), 14022-14033, Dec. 2021, Refereed

Modified SILAR grown ZnO films on p ‐Si(100) with enhanced charge separation for UV light sensing application
Jose Presiphil B. Ontolan; Junie Jhon M. Vequizo; Akira Yamakata; Reynaldo M. Vequizo
physica status solidi (a), 218(22), 2100363-2100363, Oct. 2021, Refereed

Forward and backward electron transfer on Pt loaded TiO2 photocatalysts under visible-light illumination
Naohiro Inoue; Kyohei Shiraki; Kosaku Kato; Shu Ashimura; Masaaki Yoshida; Akira Yamakata
Applied Physics Letters, 119(13), 133905-133905, Sep. 2021, Refereed
Last, Corresponding

Time-Retrenched Synthesis of BaTaO2N by Localizing an NH3 Delivery System for Visible-Light-Driven Photoelectrochemical Water Oxidation at Neutral pH: Solid-State Reaction or Flux Method?
Mirabbos Hojamberdiev; J. Manuel Mora-Hernandez; Ronald Vargas; Akira Yamakata; Kunio Yubuta; Eva Maria Heppke; Leticia M. Torres-Martínez; Katsuya Teshima; Martin Lerch
ACS Applied Energy Materials, 4(9), 9315-9327, Sep. 2021, Refereed

Control of the Photocatalytic Activity of Metastable Layered Oxynitride K2LaTa2O6N through Topochemical Transformation of Tuned Oxide Precursors
Hiroto Mogi; Kosaku Kato; Shuhei Yasuda; Tomoki Kanazawa; Akinobu Miyoshi; Shunta Nishioka; Takayoshi Oshima; Ya Tang; Toshiyuki Yokoi; Shunsuke Nozawa; Akira Yamakata; Kazuhiko Maeda
Chemistry of Materials, 33(16), 6443-6452, Aug. 2021, Refereed

Surface Modifications of (ZnSe)0.5(CuGa2.5Se4.25)0.5 to Promote Photocatalytic Z-Scheme Overall Water Splitting
Shanshan Chen; Junie Jhon M. Vequizo; Zhenhua Pan; Takashi Hisatomi; Mamiko Nakabayashi; Lihua Lin; Zheng Wang; Kosaku Kato; Akira Yamakata; Naoya Shibata; Tsuyoshi Takata; Taro Yamada; Kazunari Domen
Journal of the American Chemical Society, 143(28), 10633-10641, Jul. 2021, Refereed

Simultaneously Tuning the Defects and Surface Properties of Ta3N5 Nanoparticles by Mg–Zr Codoping for Significantly Accelerated Photocatalytic H2 Evolution
Jiadong Xiao; Junie Jhon M. Vequizo; Takashi Hisatomi; Jabor Rabeah; Mamiko Nakabayashi; Zheng Wang; Qi Xiao; Huihui Li; Zhenhua Pan; Mary Krause; Nick Yin; Gordon Smith; Naoya Shibata; Angelika Brückner; Akira Yamakata; Tsuyoshi Takata; Kazunari Domen
Journal of the American Chemical Society, 143(27), 10059-10064, Jul. 2021, Refereed

Buckyball as an Electron Donor in a Dyad of C60 and Xanthene Dye
Haruka Kano; Kyohei Matsuo; Hironobu Hayashi; Kosaku Kato; Akira Yamakata; Hiroko Yamada; Naoki Aratani
European Journal of Organic Chemistry, 2021(23), 3377-3381, Jun. 2021, Refereed

Titanium Dioxide/Polyvinyl Alcohol/Cork Nanocomposite: A Floating Photocatalyst for the Degradation of Methylene Blue under Irradiation of a Visible Light Source
Nurul Hidayah Mohamad Idris; Jayalakshmi Rajakumar; Kuan Yew Cheong; Brendan J. Kennedy; Teruhisa Ohno; Akira Yamakata; Hooi Ling Lee
ACS Omega, 6(22), 14493-14503, Jun. 2021, Refereed

(Invited) Core-Shell Double Doping for the Remarkable Photocatalytic Water Splitting on Ga2O3
Akira Yamakata; Junie Jhon M. Vequizo; Kosaku Kato; Yoshihisa Sakata
ECS Meeting Abstracts, {MA}2021-01(15), 725-725, May 2021

Atomically dispersed antimony on carbon nitride for the artificial photosynthesis of hydrogen peroxide
Zhenyuan Teng; Qitao Zhang; Hongbin Yang; Kosaku Kato; Wenjuan Yang; Ying-Rui Lu; Sixiao Liu; Chengyin Wang; Akira Yamakata; Chenliang Su; Bin Liu; Teruhisa Ohno
Nature Catalysis, 4(5), 374-384, May 2021, Refereed

A Na-containing Pt cocatalyst for efficient visible-light-induced hydrogen evolution on BaTaO2N
Huihui Li; Daling Lu; Shanshan Chen; Takashi Hisatomi; Junie Jhon M. Vequizo; Jiadong Xiao; Zheng Wang; Lihua Lin; Qi Xiao; Yuliang Sun; Yugo Miseki; Kazuhiro Sayama; Akira Yamakata; Tsuyoshi Takata; Kazunari Domen
Journal of Materials Chemistry A, 9(24), 13851-13854, Apr. 2021, Refereed

Utilization of Perovskite-Type Oxynitride La0.5Sr0.5Ta0.5Ti0.5O2N as an O2-Evolving Photocatalyst in Z-Scheme Water Splitting
Hiromu Kumagai; Ryosuke Aoyagi; Kosaku Kato; Akira Yamakata; Masato Kakihana; Hideki Kato
ACS Applied Energy Materials, Mar. 2021, Refereed

Core–Shell Double Doping of Zn and Ca on β-Ga2O3 Photocatalysts for Remarkable Water Splitting
Akira Yamakata; Junie Jhon M. Vequizo; Takafumi Ogawa; Kosaku Kato; Shoya Tsuboi; Naohiro Furutani; Masahiro Ohtsuka; Shunsuke Muto; Akihide Kuwabara; Yoshihisa Sakata
ACS Catalysis, 11(4), 1911-1919, Feb. 2021, Refereed
Lead

Sequential cocatalyst decoration on BaTaO2N towards highly-active Z-scheme water splitting
Zheng Wang; Ying Luo; Takashi Hisatomi; Junie Jhon M. Vequizo; Sayaka Suzuki; Shanshan Chen; Mamiko Nakabayashi; Lihua Lin; Zhenhua Pan; Nobuko Kariya; Akira Yamakata; Naoya Shibata; Tsuyoshi Takata; Katsuya Teshima; Kazunari Domen
Nature Communications, 12(1), 1005, Feb. 2021, Refereed

半導体光触媒粒子中の欠陥が及ぼす光励起キャリアの再結合促進と抑制効果
山方啓; 加藤康作
会報光触媒, 64, 27-36, Jan. 2021, Invited
Lead, Corresponding

Atomically dispersed antimony on carbon nitride for the artificial photosynthesis of hydrogen peroxide (vol 4, pg 374, 2021)
Akira Yamakata
Nature Catalysis, 2021

Cocatalyst engineering of a narrow bandgap Ga-La5Ti2Cu0.9Ag0.1O7S5 photocatalyst towards effectively enhanced water splitting
Qi Xiao; Jiadong Xiao; Junie Jhon M. Vequizo; Takashi Hisatomi; Mamiko Nakabayashi; Shanshan Chen; Zhenhua Pan; Lihua Lin; Naoya Shibata; Akira Yamakata; Tsuyoshi Takata; Kazunari Domen
Journal of Materials Chemistry A, 9(48), 27485-27492, 2021, Refereed

Earth-abundant iron(iii) species serves as a cocatalyst boosting the multielectron reduction of IO3−/I− redox shuttle in Z-scheme photocatalytic water splitting
Katsuya Murofushi; Kanta Ogawa; Hajime Suzuki; Ryota Sakamoto; Osamu Tomita; Kosaku Kato; Akira Yamakata; Akinori Saeki; Ryu Abe
Journal of Materials Chemistry A, 9(19), 11718-11725, 2021, Refereed

Heavy Metal Effects on the Photovoltaic Properties of Metallocorroles in Dye-Sensitized Solar Cells
Tomohiro Higashino; Yuma Kurumisawa; Abraham B. Alemayehu; Rune F. Einrem; Debashis Sahu; Daniel Packwood; Kosaku Kato; Akira Yamakata; Abhik Ghosh; Hiroshi Imahori
ACS Applied Energy Materials, 3(12), 12460-12467, Dec. 2020, Refereed
Corresponding

Time-Resolved Spectroscopy of Defect-Induced Effects on Photocarrier Dynamics in SrTiO3 Powder
Akira Yamakata; Kosaku Kato
ECS Meeting Abstracts, {MA}2020-02(56), 3873-3873, Nov. 2020

Optically Transparent Colloidal Dispersion of Titania Nanoparticles Storable for Longer than One Year Prepared by Sol/Gel Progressive Hydrolysis/Condensation
Keito Sano; Fazalurahman Kuttassery; Tetsuya Shimada; Tamao Ishida; Shinsuke Takagi; Bunsho Ohtani; Akira Yamakata; Tetsuo Honma; Hiroshi Tachibana; Haruo Inoue
ACS Applied Materials & Interfaces, 12(40), 44743-44753, Oct. 2020, Refereed

Investigation on the highly active SrTiO3 photocatalyst toward overall H2O splitting by doping Na ion
Junzhe Jiang; Kosaku Kato; Hirotaka Fujimori; Akira Yamakata; Yoshihisa Sakata
Journal of Catalysis, 390, 81-89, Aug. 2020, Refereed

Synthesis of Three-Layer Perovskite Oxynitride K2Ca2Ta3O9N·2H2O and Photocatalytic Activity for H2 Evolution under Visible Light
Ya Tang; Kosaku Kato; Takayoshi Oshima; Hiroto Mogi; Akinobu Miyoshi; Kotaro Fujii; Kei-ichi Yanagisawa; Koji Kimoto; Akira Yamakata; Masatomo Yashima; Kazuhiko Maeda
Inorganic Chemistry, 59(15), 11122-11128, Aug. 2020, Refereed

Heteroatom Dopants Promote Two‐Electron O 2 Reduction for Photocatalytic Production of H 2 O 2 on Polymeric Carbon Nitride
Peng Zhang; Yawen Tong; Yong Liu; Junie Jhon M. Vequizo; Hongwei Sun; Can Yang; Akira Yamakata; Fengtao Fan; Wei Lin; Xinchen Wang; Wonyong Choi
Angewandte Chemie International Edition, 59, 16209-16217, Jun. 2020, Refereed

Activation of a Pt-loaded Pb2Ti2O5.4F1.2 photocatalyst by alkaline chloride treatment for improved H2 evolution under visible light
Wakayama, H.; Kato, K.; Kashihara, K.; Uchiyama, T.; Miyoshi, A.; Nakata, H.; Lu, D.; Oka, K.; Yamakata, A.; Uchimoto, Y.; Maeda, K.
Journal of Materials Chemistry A, 8(18), 9099-9108, Apr. 2020, Refereed

Efficient photocatalytic hydrogen evolution on single-crystalline metal selenide particles with suitable cocatalysts
Shanshan Chen; Junie Jhon; M. Vequizo; Takashi Hisatomi; Mamiko Nakabayashi; Lihua Lin; Zheng Wang; Akira Yamakata; Naoya Shibata; Tsuyoshi Takata; Taro Yamada; Kazunari Domen
Chemical Science, 11(25), 6436-6441, Apr. 2020, Refereed

How g-C3N4 Works and Is Different from TiO2 as an Environmental Photocatalyst: Mechanistic View
Jonghun Lim; Hyejin Kim; Jihee Park; Gun-Hee Moon; Junie Jhon M Vequizo; Akira Yamakata; Jinwoo Lee; Wonyong Choi
Environmental science & technology, 54(1), 497-506, Jan. 2020

時間分解分光測定による粉末欠陥への光励起キャリアー捕捉過程と光触媒活性に及ぼす影響
山方啓* and Junie Jhon M. Vequizo,
触媒 【特集号: 触媒設計を拓く欠陥構造のキャラクタリゼーション】, 62(1), 22-28, Jan. 2020, Refereed
Lead, Corresponding

Identification of Individual Electron- and Hole-Transfer Kinetics at CoOx/BiVO4/SnO2 Double Heterojunctions
Akira Yamakata; Chandana Sampath; Kumara Ranasinghe; Naruki Hayashi; Kosaku Kato; Junie Jhon; M. Vequizo
ACS Applied Energy Materials, 3(1), 1207-1214, Jan. 2020, Refereed
Lead, Corresponding

Synthesis of Copolymerized Carbon Nitride Nanosheets from Urea and 2-Aminobenzonitrile for Enhanced Visible-Light CO2 Reduction with a Ruthenium(II) Complex Catalyst
Kengo Shibata; Kosaku Kato; Constantine Tsounis; Tomoki Kanazawa; Daling Lu; Shunsuke Nozawa; Akira Yamakata; Osamu Ishitani; Kazuhiko Maeda
Solar RRL, 4(8), 1900461, Jan. 2020, Refereed

How g-C3N4 Works and Is Different from TiO2 as Environmental Photocatalyst: Mechanistic View
Jonghun Lim; Hyejin Kim; Jihee Park; Gun-hee Moon; Junie Jhon; M. Vequizo; Akira Yamakata; Jinwoo Lee; Wonyong Choi
Environmental Science & Technology, 54(1), 497-506, Jan. 2020, Refereed

Enhancement of UV-responsive photocatalysts aided by visible-light responsive photocatalysts: Role of WO3 for H2 evolution on CuCl
Takagi, M.; Kawaguchi, M.; Yamakata, A.
Applied Catalysis B: Environmental, 263, 118333-118333, 2020, Refereed

Nano vs. bulk rutile TiO2:N,F in Z-scheme overall water splitting under visible light
Akinobu Miyoshi; Kosaku Kato; Toshiyuki Yokoi; Jan J. Wiesfeld; Kiyotaka Nakajima; Akira Yamakata; Kazuhiko Maeda
Journal of Materials Chemistry A, 8(24), 11996-12002, 2020, Refereed

Enhancement of photoelectrochemical activity of TiO2 electrode by particulate/dense double-layer formation
Hayashi, N.; Kato, K.; Yamakata, A.
The Journal of chemical physics, 152(24), 241101-241101, 2020, Refereed, Invited
Corresponding

Defect-Induced Acceleration and Deceleration of Photocarrier Recombination in SrTiO3Powders
Kato, K.; Yamakata, A.; Yamakata, A.
Journal of Physical Chemistry C, 124(20), 11057-11063, 2020, Refereed
Corresponding

Cobalt Aluminate Spinel as a Cocatalyst for Photocatalytic Oxidation of Water: Significant Hole-Trapping Effect
Kanazawa, T.; Kato, K.; Yamaguchi, R.; Uchiyama, T.; Lu, D.; Nozawa, S.; Yamakata, A.; Uchimoto, Y.; Maeda, K.
ACS Catalysis, 10(9), 4960-4966, 2020, Refereed
Corresponding

Synthesis of three-component C3N4/rGO/C-TiO2 photocatalyst with enhanced visible-light responsive photocatalytic deNOx activity
Noda, C.; Asakura, Y.; Shiraki, K.; Yamakata, A.; Yin, S.
Chemical Engineering Journal, 390, 124616-124616, 2020, Refereed

Fe/Ru Oxide as Versatile and Effective Cocatalyst for Boosting Z-Scheme Water Splitting: Suppressing Undesirable Backward Electron Transfer
Akinobu Nakada; Hajime Suzuki; Junie Jhon; M. Vequizo; Kanta Ogawa; Masanobu Higashi; Akinori Saeki; Akira Yamakata; Hiroshi Kageyama; Ryu Abe
ACS Applied Materials & Interfaces, 11(49), 45606-45611, Nov. 2019, Refereed

Crucial impact of reduction on the photocarriers dynamics on SrTiO3 powders studied by transient absorption spectroscopy
Junie Jhon; M. Vequizo; Shunta Nishioka; Junji Hyodo; Yoshihiro Yamazaki; Kazuhiko Maeda; Akira Yamakata
J. Mater. Chem. A, 7(45), 26139-26146, Oct. 2019, Refereed

Effect of Na-doping on Electron Decay kinetics in SrTiO3 Photocatalyst
Kosaku Kato; Junzhe Jiang; Yoshihisa Sakata; Akira Yamakata
ChemCatChem, 11(24), 6349-6354, Oct. 2019, Refereed

Achievement of High Photocatalytic Performance to BaTi4O9 toward Overall H2O Splitting
Yuichi Hiramachi; Hirotaka Fujimori; Akira Yamakata; Yoshihisa Sakata
ChemCatChem, 11(24), 6213-6217, Oct. 2019, Refereed

Solar-Driven Photoelectrochemical Water Oxidation over an n-Type Lead-Titanium Oxyfluoride Anode
Naoki Hirayama; Hiroko Nakata; Haruki Wakayama; Shunta Nishioka; Tomoki Kanazawa; Ryutaro Kamata; Yosuke Ebato; Kosaku Kato; Hiromu Kumagai; Akira Yamakata; Kengo Oka; Kazuhiko Maeda
J. Am. Chem. Soc., 141(43), 17158-17165, Oct. 2019, Refereed

Enhanced water splitting through two-step photoexcitation by sunlight using tantalum/nitrogen-codoped rutile titania as a water oxidation photocatalyst
Shunta Nishioka; Kei-ichi Yanagisawa; Daling Lu; Junie Jhon; M. Vequizo; Akira Yamakata; Koji Kimoto; Miki Inada; Kazuhiko Maeda
Sustainable Energy & Fuels, 3(9), 2337-2346, Jul. 2019, Refereed

Enhanced Visible Light Response of TiO2 Codoped with Cr and Ta Photocatalysts by Electron Doping
Fumiaki Amano; Masashi Nakata; Junie Jhon M. Vequizo; Akira Yamakata
ACS Applied Energy Materials, 2(5), 3274-3282, May 2019, Refereed

Oxygen-Doped Ta3N5 Nanoparticles for Enhanced Z-Scheme Carbon Dioxide Reduction with a Binuclear Ruthenium(II) Complex under Visible Light
Kanemichi Muraoka; Junie Jhon; M. Vequizo; Ryo Kuriki; Akira Yamakata; Tomoki Uchiyama; Daling Lu; Yoshiharu Uchimoto; Osamu Ishitani; Kazuhiko Maeda
ChemPhotoChem, 3(10), 1027-1033, May 2019, Refereed

Construction of Spatial Charge Separation Facets on BaTaO2N Crystals by Flux Growth Approach for Visible-Light-Driven H2 Production
Ying Luo; Sayaka Suzuki; Zheng Wang; Kunio Yubuta; Junie Jhon; M. Vequizo; Akira Yamakata; Hiromasa Shiiba; Takashi Hisatomi; Kazunari Domen; Katsuya Teshima
ACS Applied Materials & Interfaces, 11(25), 22264-22271, May 2019, Refereed

Effect of CuFe2O4 ferrite on photocatalysis and carrier dynamics of electrospun α-Fe2O3 nanofibers by time-resolved transient absorption spectroscopy
Pei-Hsuan Hung; Junie Jhon; M. Vequizo; Ren-An Wu; Akira Yamakata; Wenjea J. Tseng
Ceram. Int., 45(12), 15676-15680, May 2019, Refereed

Improvement of photocatalytic activity under visible-light irradiation by heterojunction of Cu ion loaded WO3 and Cu ion loaded N-TiO2
Tomoya Iihoshi; Takeshi Ohwaki; Junie Jhon; M. Vequizo; Akira Yamakata
Applied Catalysis B: Environmental, 248, 249-254, Feb. 2019, Refereed

Sodium titanium oxide bronze nanoparticles synthesized via concurrent reduction and Na+-doping into TiO2(B)
Hasegawa, George; Tanaka, Moeko; Vequizo, Junie Jhon M.; Yamakata, Akira; Hojo, Hajime; Kobayashi, Makoto; Kakihana, Masato; Inada, Miki; Akamatsu, Hirofumi; Hayashi, Katsuro
NANOSCALE, 11(3), 1442-1450, Jan. 2019, Refereed

Clear and transparent nanocrystals for infrared-responsive carrier transfer
Sakamoto, M.; Kawawaki, T.; Kimura, M.; Vequizo, J.J.M.; Matsunaga, H.; Ranasinghe, C.S.K.; Yamakata, A.; Matsuzaki, H.; Furube, A.; Teranishi, T.
Nature communications, 10(1), 406-406, 2019, Refereed

Near infrared light induced plasmonic hot hole transfer at a nano-heterointerface
Zichao Lian; Masanori Sakamoto; Hironori Matsunaga; Junie Jhon M. Vequizo; Akira Yamakata; Mitsutaka Haruta; Hiroki Kurata; Wataru Ota; Tohru Sato; Toshiharu Teranishi
Nature Communications, 9(1), 2314-2314, Dec. 2018, Refereed

Plasmonic p–n Junction for Infrared Light to Chemical Energy Conversion
Zichao Lian; Masanori Sakamoto; Junie Jhon; M. Vequizo; Chandana Sampath; Kumara Ranasinghe; Akira Yamakata; Takuro Nagai; Koji Kimoto; Yoichi Kobayashi; Naoto Tamai; Toshiharu Teranishi
J. Am. Chem. Soc., 141(6), 2446-2450, Dec. 2018, Refereed

Curious Behaviors of Photogenerated Electrons and Holes at the Defects on Anatase, Rutile, and Brookite TiO2 Powders: A Review
Akira Yamakata; Junie Jhon; M. Vequizo
J. Photochem. Photobiol. C-Photochem. Rev., 40, 234-243, Dec. 2018, Refereed, Invited

Expansion of the photoresponse window of a BiVO4 photocatalyst by doping with chromium(VI)
Kazuya Okuno; Hideki Kato; Junie Jhon; M. Vequizo; Akira Yamakata; Hisayoshi Kobayashi; Makoto Kobayashi; Masato Kakihana
RSC Advances, 8(67), 38140-38145, Nov. 2018, Refereed

A Copolymerization Approach to Improving Ru(II)-Complex/C3N4 Hybrid Photocatalysts for Visible-Light CO2 Reduction
Constantine Tsounis; Ryo Kuriki; Kengo Shibata; Junie Jhon; M. Vequizo; Daling Lu; Akira Yamakata; Osamu Ishitani; Rose Amal; Kazuhiko Maeda
ACS Sustainable Chemistry & Engineering, 6(11), 15333-15340, Oct. 2018, Refereed

Effects of Interfacial Electron Transfer in Metal Complex−Semiconductor Hybrid Photocatalysts on Z‑Scheme CO2 Reduction under Visible Light
Akinobu Nakada; Ryo Kuriki; Keita Sekizawa; Shunta Nishioka; Junie Jhon; M. Vequizo; Tomoki Uchiyama; Nozomi Kawakami; Daling Lu; Akira Yamakata; Yoshiharu Uchimoto; Osamu Ishitani; Kazuhiko Maeda
ACS Catalysis, 8(10), 9744-9754, Sep. 2018, Refereed

Undoped Layered Perovskite Oxynitride Li2 LaTa2 O6 N for Photocatalytic CO2 Reduction with Visible Light.
Takayoshi Oshima; Tom Ichibha; Ken Sinkou Qin; Kanemichi Muraoka; Junie Jhon M Vequizo; Keisuke Hibino; Ryo Kuriki; Shunsuke Yamashita; Kenta Hongo; Tomoki Uchiyama; Kotaro Fujii; Daling Lu; Ryo Maezono; Akira Yamakata; Hideki Kato; Koji Kimoto; Masatomo Yashima; Yoshiharu Uchimoto; Masato Kakihana; Osamu Ishitani; Hiroshi Kageyama; Kazuhiko Maeda
Angewandte Chemie (International ed. in English), 57(27), 8154-8158, Jul. 2018, Refereed

Enhanced photocatalytic NOx decomposition of visible-light responsive F-TiO2/(N,C)-TiO2 by charge transfer between F-TiO2 and (N,C)-TiO2through their doping levels
Shio Komatsuda; Yusuke Asakura; Junie Jhon; M. Vequizo; Akira Yamakata; Shu Yin
Appl. Catal. B-Environ., 238, 358-364, Jul. 2018, Refereed

Binary flux-promoted formation of trigonal ZnIn2S4 layered crystals using ZnS-containing industrial waste and their photocatalytic performance for H2 production
Mirabbos Hojamberdiev; Yanfei Cai; Junie Jhon; M. Vequizo; Mohammad Mansoob Khan; Ronald Vargas; Kunio Yubuta; Akira Yamakata; Katsuya Teshima; Masashi Hasegawa
Green Chemistry, 20(16), 3845-3856, Jul. 2018, Refereed

Excited-State Dynamics of Graphitic Carbon Nitride Photocatalyst and Ultrafast Electron Injection to a Ru(II) Mononuclear Complex for Carbon Dioxide Reduction
Ryo Kuriki; Chandana Sampath; Kumara Ranasinghe; Yasuomi Yamazaki; Akira Yamakata; Osamu Ishitani; Kazuhiko Maeda
J. Phys. Chem. C., 122(29), 16795-16802, Jun. 2018, Refereed

Homogeneous Electron Doping into Non-Stoichiometric Strontium Titanate Improves Its Photocatalytic Activity for Hydrogen and Oxygen Evolution
Shunta Nishioka; Junji Hyodo; Junie Jhon; M. Vequizo; Shunsuke Yamashita; Hiromu Kumagai; Koji Kimoto; Akira Yamakata; Yoshihiro Yamazaki; Kazuhiko Maeda
ACS Catal., 8(8), 7190-7200, Jun. 2018, Refereed

Role of CoOx cocatalyst on Ta3N5 photocatalysts studied by transient visible to mid-infrared absorption spectroscopy
Junie Jhon M. Vequizo; Mirabbos Hojamberdiev; Katsuya Teshima; Akira Yamakata
Journal of Photochemistry and Photobiology A: Chemistry, 358, 315-319, May 2018, Refereed

Fabrication of robust TiO2 thin films by atomized spray pyrolysis deposition for photoelectrochemical water oxidation
Chandana Sampath Kumara Ranasinghe; Junie Jhon M. Vequizo; Akira Yamakata
Journal of Photochemistry and Photobiology A: Chemistry, 358, 320-326, May 2018, Refereed

Structural changes of water molecules during photoelectrochemical water oxidation on TiO2 thin film electrodes
Chandana Sampath Kumara Ranasinghe; Akira Yamakata
Physical Chemistry Chemical Physics, 20(5), 3388-3394, Feb. 2018, Refereed

Oxygen induced enhancement of NIR emission in brookite TiO2 powders: Comparison with rutile and anatase TiO2 powders
Junie Jhon M. Vequizo; Sunao Kamimura; Teruhisa Ohno; Akira Yamakata
Physical Chemistry Chemical Physics, 20(5), 3241-3248, Feb. 2018, Refereed

Nitrogen/fluorine-codoped rutile titania as a stable oxygen-evolution photocatalyst for solar-driven Z-scheme water splitting
Akinobu Miyoshi; Junie Jhon M. Vequizo; Shunta Nishioka; Yuma Kato; Muneaki Yamamoto; Shunsuke Yamashita; Toshiyuki Yokoi; Akihide Iwase; Shunsuke Nozawa; Akira Yamakata; Tomoko Yoshida; Koji Kimoto; Akihiko Kudo; Kazuhiko Maeda
Sustainable Energy & Fuels, 2, 2025-2035, 2018, Refereed

Visible-light CO2 reduction over a ruthenium(ii)-complex/C3N4 hybrid photocatalyst: The promotional effect of silver species
Kazuhiko Maeda; Daehyeon An; Chandana Sampath Kumara Ranasinghe; Tomoki Uchiyama; Ryo Kuriki; Tomoki Kanazawa; Daling Lu; Shunsuke Nozawa; Akira Yamakata; Yoshiharu Uchimoto; Osamu Ishitani
Journal of Materials Chemistry A, 6(20), 9708-9715, 2018, Refereed

Engaging the flux-grown La1-xSrxFe1-yTiyO3 crystals in visible-light-driven photocatalytic hydrogen generation
Mirabbos Hojamberdiev; Kenta Kawashima; Mahesh Kumar; Akira Yamakata; Kunio Yubuta; Aleksander Gurlo; Masashi Hasegawa; Kazunari Domen; Katsuya Teshima
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 42(44), 27024-27033, Nov. 2017, Refereed

Elucidating the impact of A-site cation change on photocatalytic H-2 and O-2 evolution activities of perovskite-type LnTaON(2) (Ln = La and Pr)
Mirabbos Hojamberdiev; Maged F. Bekheet; Judy N. Hart; Junie Jhon M. Vequizo; Akira Yamakata; Kunio Yubuta; Aleksander Gurlo; Masashi Hasegawa; Kazunari Domen; Katsuya Teshima
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 19(33), 22210-22220, Sep. 2017, Refereed

Cation-dependent restructure of the electric double layer on CO-covered Pt electrodes: Difference between hydrophilic and hydrophobic cations
Akira Yamakata; Masatoshi Osawa
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 800, 19-24, Sep. 2017, Refereed

Interfacial Manipulation by Rutile TiO2 Nanoparticles to Boost CO2 Reduction into CO on a Metal-Complex/Semiconductor Hybrid Photocatalyst
Keisuke Wada; Chandana Sampath Kumara Ranasinghe; Ryo Kuriki; Akira Yamakata; Osamu Ishitani; Kazuhiko Maeda
ACS APPLIED MATERIALS & INTERFACES, 9(28), 23869-23877, Jul. 2017, Refereed

Solar-driven Z-scheme water splitting using tantalum/nitrogen co-doped rutile titania nanorod as an oxygen evolution photocatalyst
Akinobu Nakada; Shunta Nishioka; Junie Jhon M. Vequizo; Kanemichi Muraoka; Tomoki Kanazawa; Akira Yamakata; Shunsuke Nozawa; Hiromu Kumagai; Shin-ichi Adachi; Osamu Ishitani; Kazuhiko Maeda
JOURNAL OF MATERIALS CHEMISTRY A, 5(23), 11710-11719, Jun. 2017, Refereed

Trapping-Induced Enhancement of Photocatalytic Activity on Brookite TiO2 Powders: Comparison with Anatase and Rutile TiO2 Powders
Junie Jhon M. Vequizo; Hironori Matsunaga; Tatsuya Ishiku; Sunao Karnimura; Teruhisa Ohno; Akira Yamakata
ACS CATALYSIS, 7(4), 2644-2651, Apr. 2017, Refereed

The contrasting effect of the Ta/Nb ratio in (111)-layered B-site deficient hexagonal perovskite Ba5Nb4-xTaxO15 crystals on visible-light-induced photocatalytic water oxidation activity of their oxynitride derivatives
Mirabbos Hojamberdiev; Maged F. Bekheet; Ehsan Zahedi; Hajime Wagata; Junie Jhon M. Vequizo; Akira Yamakata; Kunio Yubuta; Aleksander Gurlo; Kazunari Domen; Katsuya Teshima
DALTON TRANSACTIONS, 45(31), 12559-12568, Aug. 2016, Refereed

Photocatalytic property of metal ion added SrTiO3 to Overall H2O splitting
Yoshihisa Sakata; Yoshiko Miyoshi; Tatsuya Maeda; Kohki Ishikiriyama; Yuki Yamazaki; Hayao Imamura; Yeilin Ham; Takashi Hisatomi; Jun Kubota; Akira Yamakata; Kazunari Domen
APPLIED CATALYSIS A-GENERAL, 521, 227-232, Jul. 2016, Refereed

Enhancement of photoelectrochemical activity of SnS thin-film photoelectrodes using TiO2, Nb2O5, and Ta2O5 metal oxide layers
Junie Jhon M. Vequizo; Masanori Yokoyama; Masaya Ichimura; Akira Yamakata
APPLIED PHYSICS EXPRESS, 9(6), 067101, Jun. 2016, Refereed

Dynamics of Photogenerated Charge Carriers on Ni- and Ta-Doped SrTiO3 Photocatalysts Studied by Time-Resolved Absorption and Emission Spectroscopy
Akira Yamakata; Masayuki Kawaguchi; Ryosuke Murachi; Masahiro Okawa; Itaru Kamiya
JOURNAL OF PHYSICAL CHEMISTRY C, 120(15), 7997-8004, Apr. 2016, Refereed

Nature-Inspired, Highly Durable CO2 Reduction System Consisting of a Binuclear Ruthenium(II) Complex and an Organic Semiconductor Using Visible Light
Ryo Kuriki; Hironori Matsunaga; Takuya Nakashima; Keisuke Wada; Akira Yamakata; Osamu Ishitani; Kazuhiko Maeda
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 138(15), 5159-5170, Apr. 2016, Refereed

酸化チタン光触媒のキャリアーダイナミクス－粉末におけるアナターゼとルチルの特異的な挙動－
山方啓
光化学, 47(1), 25-32, Apr. 2016, Refereed

KCl flux-induced growth of isometric crystals of cadmium-containing early transition-metal (Ti4+, Nb5+, and Ta5+) oxides and nitridability to form their (oxy)nitride derivatives under an NH3 atmosphere for water splitting application
Mirabbos Hojamberdiev; Hajime Wagata; Kunio Yubuta; Kenta Kawashima; Junie Jhon M. Vequizo; Akira Yamakata; Shuji Oishi; Kazunari Domen; Katsuya Teshima
APPLIED CATALYSIS B-ENVIRONMENTAL, 182, 626-635, Mar. 2016, Refereed

Transient Absorption and FT-IR Analysis of the Carrier Dynamics of TiO2 Photocatalysts
Vequizo Junie Jhon; Matsunaga Hironori; Okamura Shou; Ohno Teruhisa; Yamakata Akira
表面科学学術講演会要旨集, 36(0), 217-217, Jan. 2016

Behavior of photogenerated charge carriers on metal-particle loaded photocatalysts studied by time-resolved absorption spectroscopy
Yamakata Akira
Abstract of annual meeting of the Surface Science of Japan, 36, 216-216, 2016

Femto-second time-resolved absorption study on photocatalysts
Matsunaga Hironori; Vequizo Junie Jhon; Yamakata Akira
Abstract of annual meeting of the Surface Science of Japan, 36, 218-218, 2016

Flux-mediated doping of SrTiO3 photocatalysts for efficient overall water splitting
Yeilin Ham; Takashi Hisatomi; Yosuke Goto; Yosuke Moriya; Yoshihisa Sakata; Akira Yamakata; Jun Kubota; Kazunari Domen
JOURNAL OF MATERIALS CHEMISTRY A, 4(8), 3027-3033, 2016, Refereed

Morphology-sensitive trapping states of photogenerated charge carriers on SrTiO3 particles studied by time-resolved visible to Mid-IR absorption spectroscopy: The effects of molten salt flux treatments
Akira Yamakata; Ham Yeilin; Masayuki Kawaguchi; Takashi Hisatomi; Jun Kubota; Yoshihisa Sakata; Kazunari Domen
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 313, 168-175, Dec. 2015, Refereed

Distinctive Behavior of Photogenerated Electrons and Holes in Anatase and Rutile TiO2 Powders
Akira Yamakata; Junie Jhon M. Vequizo; Hironori Matsunaga
JOURNAL OF PHYSICAL CHEMISTRY C, 119(43), 24538-24545, Oct. 2015, Refereed

NH3-Assisted Flux Growth of Cube-like BaTaO2N Submicron Crystals in a Completely Ionized Nonaqueous High-Temperature Solution and Their Water Splitting Activity
Mirabbos Hojamberdiev; Kunio Yubuta; Junie Jhon M. Vequizo; Akira Yamakata; Shuji Oishi; Kazunari Domen; Katsuya Teshima
CRYSTAL GROWTH & DESIGN, 15(9), 4663-4671, Sep. 2015, Refereed

NH3-Assisted Flux-Mediated Direct Growth of LaTiO2N Crystallites for Visible-Light-Induced Water Splitting
Kenta Kawashirna; Mirabbos Hojamberdiev; Hajirne Wagata; Kunio Yubuta; Junie Jhon M. Vequizo; Akira Yamakata; Shuji Oishi; Kazunari Domen; Katsuya Teshima
JOURNAL OF PHYSICAL CHEMISTRY C, 119(28), 15896-15904, Jul. 2015, Refereed

時間分解可視中赤外分光法を用いた光励起キャリアーの反応活性評価
山方啓; 久保田純; 堂免一成
触媒, 115, 52-54, Mar. 2015

Behavior and Energy State of Photogenerated Charge Carriers in Single-Crystalline and Polycrystalline Powder SrTiO3 Studied by Time-Resolved Absorption Spectroscopy in the Visible to Mid-Infrared Region
Akira Yamakata; Junie Jhon M. Vequizo; Masayuki Kawaguchi
JOURNAL OF PHYSICAL CHEMISTRY C, 119(4), 1880-1885, Jan. 2015, Refereed

Surface-enhanced IR absorption spectroscopy of the KcsA potassium channel upon application of an electric field
Akira Yamakata; Hirofumi Shimizu; Shigetoshi Oiki
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 17(33), 21104-21111, 2015, Refereed

Behavior and Energy States of Photogenerated Charge Carriers on Pt- or CoOx-Loaded LaTiO2N Photocatalysts: Time-Resolved Visible to Mid-Infrared Absorption Study
Akira Yamakata; Masayuki Kawaguchi; Naoyuki Nishimura; Tsutomu Minegishi; Jun Kubota; Kazunari Domen
JOURNAL OF PHYSICAL CHEMISTRY C, 118(41), 23897-23906, Oct. 2014, Refereed

電極界面におけるイオンの水和殻崩壊過程の時間分解赤外分光観察
山方啓; 大澤雅俊; 森田明弘
Electrochemistry 電気化学および工業物理化学, 82(9), 771-776, Sep. 2014, Refereed

Behavior of Photogenerated Charge Carriers on Several Photocatalysts Studied by Time-resolved IR Absorption Spectroscopy.
天野史章; 山方啓
触媒, 56(2), 88-94, Apr. 2014, Refereed

Properties of N-H Local Vibration Modes in GaAsN Grown by Chemical Beam Epitaxy
Kazuma Ikeda; Akira Yamakata; Koushiro Demizu; Nobuaki Kojima; Oshio Ohshita; Masafumi Yamaguchi
2014 IEEE 40TH PHOTOVOLTAIC SPECIALIST CONFERENCE (PVSC), 1821-1824, 2014

Effect of Particle Size on the Photocatalytic Activity of WO3 Particles for Water Oxidation
Fumiaki Amano; Eri Ishinaga; Akira Yamakata
JOURNAL OF PHYSICAL CHEMISTRY C, 117(44), 22584-22590, Nov. 2013, Refereed

Real-Time Observation of the Destruction of Hydration Shells
Akira Yamakata; Eiji Soeta; Tatsuya Ishiyama; Masatoshi Osawa; Akihiro Morita
J. Am. Chem. Soc., 135(40), 977-988, Oct. 2013, Refereed

Real-Time Observation of the Destruction of Hydration Shells under Electrochemical Force
Akira Yamakata; Eiji Soeta; Tatsuya Ishiyama; Masatoshi Osawa; Akihiro Morita
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 135(40), 15033-15039, Oct. 2013, Refereed

Photocatalytic activity of titania particles calcined at high temperature: Investigating deactivation
Fumiaki Amano; Masashi Nakata; Kenji Asami; Akira Yamakata
Chemical Physics Letters, 579, 111-113, Jul. 2013, Refereed

Structural changes of the KcsA potassium channel upon application of the electrode potential studied by surface-enhanced IR absorption spectroscopy
Akira Yamakata; Hirofumi Shimizu; Masatoshi Osawa; Shigetoshi Oiki
CHEMICAL PHYSICS, 419, 224-228, Jun. 2013, Refereed

Electronically cross-linked PbS quantum dot networks using polymers as surface ligands
Wei Lü; Yue Yang; Akira Yamakata; Itaru Kamiya
Nano, 8(2), 1350013.1-1350013.7, Apr. 2013, Refereed

Cobalt-Modified Porous Single-Crystalline LaTiO2N for Highly Efficient Water Oxidation under Visible Light
Fuxiang Zhang; Akira Yamakata; Kazuhiko Maeda; Yosuke Moriya; Tsuyoshi Takata; Jun Kubota; Katsuya Teshima; Shuji Oishi; Kazunari Domen
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 134(20), 8348-8351, May 2012, Refereed

Infrared Spectroscopic Study of the Potential Change at Cocatalyst Particles on Oxynitride Photocatalysts for Water Splitting by Visible Light Irradiation
Xuwang Lu; Athula Bandara; Masao Katayama; Akira Yamakata; Jun Kubota; Kazunari Domen
JOURNAL OF PHYSICAL CHEMISTRY C, 115(48), 23902-23907, Dec. 2011, Refereed

Effect of Photoexcited Electron Dynamics on Photocatalytic Efficiency of Bismuth Tungstate
Fumiaki Amano; Akira Yamakata; Kohei Nogami; Masatoshi Osawa; Bunsho Ohtani
JOURNAL OF PHYSICAL CHEMISTRY C, 115(33), 16598-16605, Aug. 2011, Refereed

Potential-Dependent Recombination Kinetics of Photogenerated Electrons in n- and p-Type GaN Photoelectrodes Studied by Time-Resolved IR Absorption Spectroscopy
Akira Yamakata; Masaaki Yoshida; Jun Kubota; Masatoshi Osawa; Kazunari Domen
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 133(29), 11351-11357, Jul. 2011, Refereed

Quantum Dots and Wells for Novel Light-Energy Conversions
YAMAKATA Akira
触媒, 53(3), 201-201, Apr. 2011

Structure and Behavior of Water at the Electrochemical Interface Studied by Surface-Enhanced Infrared Absorption Spectroscopy
Masatshi Osawa; Akira Yamakata
BUNSEKI KAGAKU, 60(1), 1-9, Jan. 2011, Refereed

Destruction of the Water Layer on a Hydrophobic Surface Induced by the Forced Approach of Hydrophilic and Hydrophobic Cations
Akira Yamakata; Masatoshi Osawa
JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 1(9), 1487-1491, May 2010, Refereed

Correlation between Photoexcited Electron Lifetimes and Photocatalytic Activities of Bismuth Tungstate Particles
AMANO Fumiaki; YAMAKATA Akira; NOGAMI Kohei; OSAWA Masatoshi; OHTANI Bunsho
触媒, 52(2), 128-130, Mar. 2010, Refereed

Dynamics of photogenerated charge carriers on photocatalysts for the water splitting reaction : relation between the carrier dynamics and the steady state reactions
YAMAKATA Akira
分光研究 = Journal of the spectroscopical research of Japan, 59(1), 12-19, Feb. 2010, Refereed

ATR-SEIRAS Investigation of the Fermi Level of Pt Cocatalyst on a GaN Photocatalyst for Hydrogen Evolution under Irradiation
Masaaki Yoshida; Akira Yamakata; Kazuhiro Takanabe; Jun Kubota; Masatoshi Osawa; Kazunari Domen
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 131(37), 13218-13219, Sep. 2009, Refereed

Photoexcited processes on metal surfaces : from gas/solid toward liquid/solid interfaces
YAMAKATA Akira; OSAWA Masatoshi
Photochemistry, 40(2), 78-84, Aug. 2009, Refereed

Destruction of the hydration shell around tetraaolkylammonium ions at the electrochemical interface
Akira Yamakata; Masatoshi Osawa
Journal of the American Chemical Society, 131(20), 6892-6893, May 2009, Refereed

Acceleration of electrolysis of water by the adsorption of 4, 4'-bipyridine on Ag electrode : creation of reaction center by organic molecules
UCHIDA Taro; YAMAKATA Akira; SASAKI Youichi; OSAWA Masatoshi
觸媒 = Catalyst, 51(2), 129-131, Mar. 2009, Refereed

Electrocatalytic Reactions Studied by Time-resolved Surface-enhanced Infrared Spectroscopy
SAMJESKE Gabor; YAMAKATA Akira; UCHIDA Taro; OSAWA Masatoshi
Journal of the Surface Science Society of Japan, 30(2), 68-74, Feb. 2009, Refereed

Visible Light Responsive Pristine Metal Oxide Photocatalyst: Enhancement of Activity by Crystallization under Hydrothermal Treatment
Fumiaki Amano; Akira Yamakata; Kohei Nogami; Masatoshi Osawa; Bunsho Ohtani
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 130(52), 17650-+, Dec. 2008, Refereed

Dynamics of the Electric Double Layer of CO-covered Pt Electrode
YAMAKATA Akira; OSAWA Masatoshi
J. Surf. Sci. Soc. Jpn., 29(9), 526-531, Sep. 2008, Refereed

Hydrogen evolution reaction catalyzed by proton-coupled redox cycle of 4,4 '-bipyridine monolayer adsorbed on silver electrodes
Taro Uchida; Hirokazu Mogami; Akira Yamakata; Yoichi Sasaki; Masatoshi Osawa
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 130(33), 10862-+, Aug. 2008, Refereed

Dynamics of double-layer restructuring on a platinum electrode covered by CO: Laser-induced potential transient measurement
Akira Yamakata; Masatoshi Osawa
JOURNAL OF PHYSICAL CHEMISTRY C, 112(30), 11427-11432, Jul. 2008, Refereed

Surface-enhanced infrared absorption spectroscopic studies of adsorbed nitrate, nitric oxide, and related compounds 2: Nitrate ion adsorption at a platinum electrode
Kou Nakata; Yota Kayama; Katsuaki Shimazu; Akira Yamakata; Shen Ye; Masatoshi Osawa
LANGMUIR, 24(8), 4358-4363, Apr. 2008, Refereed

Surface-enhanced infrared absorption spectroscopic studies of adsorbed nitrate, nitric oxide, and related compounds 1: Reduction of adsorbed NO on a platinum electrode
Kou Nakata; Akinori Okubo; Katsuaki Shimazu; Akira Yamakata; Shen Ye; Masatoshl Osawa
LANGMUIR, 24(8), 4352-4357, Apr. 2008, Refereed

表面増強赤外吸収分光法による電極界面の超高速ダイナミクスの追跡
山方 啓; 大澤 雅俊
Electrochemistry 電気化学および工業物理化学 : denki kagaku, 76(3), 208-213, Mar. 2008, Refereed

Structure of water at the electrified platinum-water interface: A study by surface-enhanced infrared absorption spectroscopy
Masatoshi Osawa; Minoru Tsushima; Hirokazu Mogami; Gabor Samjeske; Akira Yamakata
JOURNAL OF PHYSICAL CHEMISTRY C, 112(11), 4248-4256, Mar. 2008, Refereed

固液界面の水分子の構造とエネルギー移動ダイナミクス
山方 啓
分光研究, 57(1), 23-24, 2008, Refereed

Time-resolved infrared absorption study of nine TiO2 photocatalysts
Akira Yamakata; Taka-aki Ishibashi; Hiroshi Onishi
CHEMICAL PHYSICS, 339(1-3), 133-137, Oct. 2007, Refereed

How the Molecules Reach the Reaction Center?
YAMAKATA AKIRA
触媒 = Catalysts & Catalysis, 48(8), 611-611, Dec. 2006, Refereed

Study on photogenerated charge carriers dynamics in sulfur-doped titanium dioxide by transient IR absorption
Kan Takeshita; Akira Yamakata; Taka-aki Ishibashi; Hiroshi Onishi; Kazumoto Nishijima; Teruhisa Ohno
J. photochem. Photobiol. B. Chemistry, 117, 269-275, Apr. 2006, Refereed

Laser-induced potential jump at the electrochemical interface probed by picosecond time-resolved surface-enhanced infrared absorption spectroscopy
A Yamakata; T Uchida; J Kubota; M Osawa
JOURNAL OF PHYSICAL CHEMISTRY B, 110(13), 6423-6427, Apr. 2006, Refereed

Adsorbed structures of 4,4 '-bipyridine on Cu(111) in acid studied by STM and IR
YX Diao; MJ Han; LJ Wan; K Itaya; T Uchida; H Miyake; A Yamakata; M Osawa
LANGMUIR, 22(8), 3640-3646, Apr. 2006, Refereed

Transient IR absorption study of charge carriers photogenerated in sulfur-doped TiO2
K Takeshita; A Yamakata; T Ishibashi; H Onishi; K Nishijima; T Ohno
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 177(2-3), 269-275, Jan. 2006, Refereed

Potential oscillations in galvanostatic electrooxidation of formic acid on platinum: A time-resolved surface-enhanced infrared study
G Samjeske; A Miki; S Ye; A Yamakata; Y Mukouyama; H Okamoto; M Osawa
JOURNAL OF PHYSICAL CHEMISTRY B, 109(49), 23509-23516, Dec. 2005, Refereed

Time-Resolved IR Absorption Study on Solid Surfaces
YAMAKATA AKIRA; OSAWA MASATOSHI
触媒 = Catalysts & Catalysis, 47(5), 334-340, Aug. 2005, Refereed

Time-resolved infrared absorption study of photochemical reactions over metal oxides
A Yamakata; T Ishibashi; K Takeshita; H Onishi
TOPICS IN CATALYSIS, 35(3-4), 211-216, Jul. 2005, Refereed

Carrier dynamics in TiO2 and Pt/TiO2 powders observed by femtosecond time-resolved near-infrared spectroscopy at a spectral region of 0.9-1.5 mu m with the direct absorption method
K Iwata; T Takaya; H Hamaguchi; A Yamakata; TA Ishibashi; H Onishi; H Kuroda
JOURNAL OF PHYSICAL CHEMISTRY B, 108(52), 20233-20239, Dec. 2004, Refereed

In situ surface-enhanced infrared study of hydrogen bond pairing of complementary nucleic acid bases at the electrochemical interface
Y Sato; H Noda; F Mizutani; A Yamakata; M Osawa
ANALYTICAL CHEMISTRY, 76(18), 5564-5569, Sep. 2004, Refereed

Effect of annealing temperature on back electron transfer and distribution of deep trap sites in dye-sensitized TiO2, studied by time-resolved infrared spectroscopy
K Takeshita; Y Sasaki; M Kobashi; Y Tanaka; S Maeda; A Yamakata; TA Ishibashi; H Onishi
JOURNAL OF PHYSICAL CHEMISTRY B, 108(9), 2963-2969, Mar. 2004, Refereed

Photodynamics of NaTaO3 catalysts for efficient water splitting
A Yamakata; T Ishibashi; H Kato; A Kudo; H Onishi
JOURNAL OF PHYSICAL CHEMISTRY B, 107(51), 14383-14387, Dec. 2003, Refereed

Time-Resolved Infrared Absorption Study of Reaction Intermediate on Pt/TiO_2 Photocatalyst
YAMAKATA Akira; ISHIBASHI Taka-aki; ONISHI Hiroshi
J. Surf. Sci. Soc. Jpn., 24(9), 563-567, Sep. 2003, Refereed

Effects of water addition on the methanol oxidation on Pt/TiO2 photocatalyst studied by time-resolved infrared absorption spectroscopy
A Yamakata; TA Ishibashi; J Onishi
JOURNAL OF PHYSICAL CHEMISTRY B, 107(36), 9820-9823, Sep. 2003, Refereed

Effects of accumulated electrons on the decay kinetics of photogenerated electrons in Pt/TiO2 photocatalyst studied by time-resolved infrared absorption spectroscopy
A Yamakata; TA Ishibashi; H Onishi
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 160(1-2), 33-36, Aug. 2003, Refereed

Microsecond kinetics of photocatalytic oxidation on Pt/TiO2 traced by vibrational spectroscopy
A Yamakata; T Ishibashi; H Onishi
CHEMICAL PHYSICS LETTERS, 376(5-6), 576-580, Jul. 2003, Refereed

Photophysics and electron dynamics in dye-sensitized semiconductor film studied by time-resolved mid-IR spectroscopy
Kan Takeshita; Yutaka Sasaki; Masahiro Kobashi; Yuki Tanaka; Shuichi Maeda; Akira Yamakata; Taka-Aki Ishibashi; Hiroshi Onishi
Journal of Physical Chemistry B, 107(17), 4156-4161, May 2003, Refereed

Kinetics of the photocatalytic water-splitting reaction on TiO2 and Pt/TiO2 studied by time-resolved infrared absorption spectroscopy
A Yamakata; T Ishibashi; H Onishi
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 199(1-2), 85-94, May 2003, Refereed

Photophysics and electron dynamics in dye-sensitized semiconductor film studied by time-resolved mid-IR spectroscopy
K Takeshita; Y Sasaki; M Kobashi; Y Tanaka; S Maeda; A Yamakata; T Ishibashi; H Onishi
JOURNAL OF PHYSICAL CHEMISTRY B, 107(17), 4156-4161, May 2003, Refereed

Studies on the electron transfer reaction between TiO_2 and adsorbed dyes by time-resolved infrared spectroscopy
TAKESHITA Kan; SASAKI Yutaka; KOBASHI Masahiro; TANAKA Yuki; MAEDA Shuichi; YAMAKATA Akira; ISHIBASHI Taka-aki; ONISHI Hiroshi
触媒, 45(2), 181-183, Mar. 2003

Electron-and Hole-transfer from TiO_2 Particles to Adsorbates Studied by Time-Resolved Infrared Absorption Spectroscopy
YAMAKATA Akira; ISHIBASHI Takaki; ONISHI Hiroshi
J. Surf. Sci. Soc. Jpn., 24(1), 46-52, Jan. 2003, Refereed

Time-resolved infrared absorption study of electron- and hole-capture reactions on photoexcited Pt/TiO2 in the presence of methanol-water vapor mixture
A Yamakata; TA Ishibashi; H Onishi
SCIENCE AND TECHNOLOGY IN CATALYSIS 2002, 145, 157-160, 2003, Refereed

Pressure dependence of electron- and hole-consuming reactions in photocatalytic water splitting on Pt/TiO2 studied by time-resolved IR absorption spectroscopy
A Yamakata; T Ishibashi; H Onishi
INTERNATIONAL JOURNAL OF PHOTOENERGY, 5(1), 7-9, 2003, Refereed

Microscopic identification of a bimolecular reaction intermediate
Hiroshi Uetsuka; Akira Sasahara; Akira Yamakata; Hiroshi Onishi
Journal of Physical Chemistry B, 106(44), 11549-11552, Nov. 2002, Refereed

Microscopic identification of a bimolecular reaction intermediate
H Uetsuka; A Sasahara; A Yamakata; H Onishi
JOURNAL OF PHYSICAL CHEMISTRY B, 106(44), 11549-11552, Nov. 2002, Refereed

Electron- and hole-capture reactions on Pt/TiO2 photocatalyst exposed to methanol vapor studied with time-resolved infrared absorption spectroscopy
Akira Yamakata; Taka-Aki Ishibashi; Hiroshi Onishi
Journal of Physical Chemistry B, 106(35), 9122-9125, Sep. 2002, Refereed

Electron- and hole-capture reactions on Pt/TiO2 photocatalyst exposed to methanol vapor studied with time-resolved infrared absorption spectroscopy
A Yamakata; T Ishibashi; H Onishi
JOURNAL OF PHYSICAL CHEMISTRY B, 106(35), 9122-9125, Sep. 2002, Refereed

Time-resolved infrared absorption studies of surface OH groups on TiO2 particles irradiated by UV pulses
A Yamakata; T Ishibashi; H Onishi
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 75(5), 1019-1022, May 2002, Refereed

時間分解赤外分光法を用いた二酸化チタン上の光励起電子と吸着分子への電荷移動反応の観察
山方 啓; 石橋 孝章; 大西 洋
触媒, 43(6), 396-398, Sep. 2001, Refereed

Water- and oxygen-induced decay kinetics of photogenerated electrons in TiO2 and Pt/TiO2: A time-resolved infrared absorption study
A Yamakata; T Ishibashi; H Onishi
JOURNAL OF PHYSICAL CHEMISTRY B, 105(30), 7258-7262, Aug. 2001, Refereed

Time-resolved infrared absorption spectroscopy of photogenerated electrons in platinized TiO2 particles
A Yamakata; T Ishibashi; H Onishi
CHEMICAL PHYSICS LETTERS, 333(3-4), 271-277, Jan. 2001, Refereed

Transport channels of X-ray beamlines at SPring-8
Akira Yamakata
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2001

Transport channels of X-ray beamlines at SPring-8
Goto, S; Ohashi, H; Takeshita, K; Yabashi, M; Yamakata, A; Asano, Y; Ishikawa, T
Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment, 467, 2001

Exchange reaction of formate with gas-phase acetic acid on Ni(110)
A Yamakata; J Kubota; JN Kondo; C Hirose; K Domen; F Wakabayashi; K Tamaru
SURFACE SCIENCE, 433, 210-214, Aug. 1999, Refereed

In situ observation of the exchange reaction of formate with molecular formic acid on Ni(110)
A Yamakata; J Kubota; JN Kondo; C Hirose; K Domen; F Wakabayashi; K Tamaru
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 141(1-3), 73-82, May 1999, Refereed

Exchange reaction of adsorbed formate with gaseous formic acid on Ni(110) studied by time-resolved Fourier transform infrared reflection absorption spectroscopy
A Yamakata; J Kubota; JN Kondo; C Hirose; K Domen; F Wakabayashi; K Tamaru
JOURNAL OF PHYSICAL CHEMISTRY B, 102(22), 4401-4403, May 1998, Refereed

The IRAS Study of the Exchange Reaction of Formate with Gaseous Formic Acid on Ni(110)
YAMAKATA Akira; KUBOTA Jun; NOMURA Junko; HIROSE Chiaki; DOMEN Kazunari; WAKABAYASHI Fumitaka
J. Surf. Sci. Soc. Jpn., 19(7), 441-445, 1998, Refereed

An IRAS Study of the Decomposition of Formate Adsorbed on Ni(110)
YAMAKATA Akira; KUBOTA Jun; NOMURA Junko; HIROSE Chiaki; DOMEN Kazunari; WAKABAYASHI Fumitaka
Journal of the Surface Science Society of Japan, 18(7), 417-423, Jul. 1997, Refereed

In situ observation of the dehydration of formate on Ni(110)
A Yamakata; J Kubota; JN Kondo; C Hirose; K Domen; F Wakabayashi
JOURNAL OF PHYSICAL CHEMISTRY B, 101(26), 5177-5181, Jun. 1997, Refereed

Isotope exchange reaction of formate with molecular hydrogen on Ni(110) by IRAS
A Yamakata; J Kubota; JN Kondo; K Domen; C Hirose
JOURNAL OF PHYSICAL CHEMISTRY, 100(46), 18177-18182, Nov. 1996, Refereed

SFG study of formic acid on a Pt(110)-(1x2) surface
N Watanabe; K Iwatsu; A Yamakata; T Ohtani; J Kubota; JN Kondo; A Wada; K Domen; C Hirose
SURFACE SCIENCE, 357(1-3), 651-655, Jun. 1996, Refereed

フラックス法で合成したBaTaO₂Nの光触媒活性と反応条件の検討
久富隆史; WANG Zheng; LUO Ying; VEQUIZO Junie Jhon; 鈴木清香; 山方啓; 高田剛; 手嶋勝弥; 堂免一成; 堂免一成
触媒討論会講演予稿集(CD-ROM), 127th, 2021

Pt助触媒が高分散担持されたBaTaO₂Nによる高効率水素生成反応
久富隆史; 久富隆史; WANG Zheng; LUO Ying; VEQUIZO Junie Jhon; 鈴木清香; 山方啓; 高田剛; 手嶋勝弥; 堂免一成; 堂免一成
光がかかわる触媒化学シンポジウム(Web), 40th, 2021

Impact of well-dispersed Pt nanoparticles on photocarriers’dynamics of BaTaO₂N for photocatalytic H₂ generation
VEQUIZO Junie Jhon M.; 加藤康作; 久富隆史; WANG Zheng; LUO Ying; 高田剛; 山方啓; 手嶋勝弥; 手嶋勝弥; 堂免一成; 堂免一成
光がかかわる触媒化学シンポジウム(Web), 39th, 2020

Inorganic assembly catalysts for artificial photosynthesis: general discussion
Hiromu Kumagai; Leif Hammarstrom; Dong Ryeol Whang; Yuki Shinohara; Jose Martinez; Joshua Karlsson; Peter Summers; Christopher D. Windle; Masanori Kodera; Richard Cogdell; Kristine Rodulfo Tolod; Dogukan Hazar Apaydin; Etsuko Fujita; Alexander Kibler; Fengtao Fan; Elizabeth A. Gibson; Hisanao Usami; Akihide Iwase; Haruo Inoue; Akihiko Kudo; Devens Gust; Kazunari Domen; Flavia Cassiola; Katsuhiko Takagi; Sang Ook Kang; Akira Yamakata; Can Li; Licheng Sun; Hyunwoong Park; Young Soo Kang; Rengui Li; Fabio Di Fonzo; Tohru Setoyama; Osamu Ishitani
FARADAY DISCUSSIONS, 198, 481 - 507, Jun. 2017, Refereed

時間分解可視中赤外分光測定でみた光触媒のキャリアーダイナミクス
山方啓; 山方啓; HAM Yeilin; 久富隆史; 久保田純; 堂免一成
光化学討論会要旨集(CD-ROM), 2015, 2015

「研究現場発」【光触媒を使って水素を製造する】山方 啓
中部経済新聞, 02 Sep. 2014

「拓く研究人」【光触媒で水素安く合成】山方 啓
日刊工業新聞, 28 May 2014

可視光で励起したAu/TiO₂光触媒のキャリアーダイナミクス
山方啓; VEQUIZO Junie Jhon M.; 松永大典; 田中淳皓; 古南博
触媒討論会討論会A予稿集, 114th, 2014

Naイオンを添加したSrTiO₃の水の完全分解反応に対する光触媒特性
酒多喜久; 三好喜子; 田中修平; 前田竜也; 田中英之; 今村速夫; YEILIN Ham; 久富隆史; 久保田純; 堂免一成; 山方啓
触媒討論会討論会A予稿集, 112th, 2013

Research highlights
Šeila Selimović; Mark W. Tibbitt; Mehmet R. Dokmeci; Ali Khademhosseini
Nature Chemistry, 13(8), 1453 - 1456, 2013
https://www.nature.com/articles/nchem.692

光励起キャリアーの動きとエネルギー制御
山方啓
化学経済, 58(14), 75, Dec. 2011

Hydrogen Evolution Reaction Catalyzed by 4,4'-Bipyridine Adsorbed on Metal Electrodes: A Combined Infrared and DFT Study
Taro Uchida; Akira Yamakata; Yoichi Sasaki; Masatoshi Osawa
ECS Meeting Abstracts, May 2011, Refereed

News Letter
社団法人日本臓器移植ネットワーク
Photonics Spectra Magazine, Jul. 2010
https://www.photonics.com/Article.aspx?AID=26040

Hydrogen Evolution Reaction Catalyzed by The Redox Cycle of 4,4’-Bipyridine Adsorbed on Ag electrode
内田太郎; 山方啓; 佐々木陽一; 大澤雅俊
日本化学会講演予稿集, 89th(1), 2009

電極表面に吸着した4,4’ビピリジンが触媒する水素発生促進反応機構
内田太郎; 山方啓; 佐々木陽一; 大澤雅俊
電気化学秋季大会講演要旨集, 2009, 2009

Enhanced Hydrogen Evolution Reaction on an Ag Electrode Catalyzed by Proton-coupled Redox of 4,4'-Bipyridine Adsorbed on the Surface
Uchida, T; Mogami, H; Yamakata, A; Sasaki, Y; Osawa, M
ECS Meeting Abstracts, 2008, Refereed

ビピリジン電極修飾による電解水素発生の促進効果
内田太郎; 山方啓; 大澤雅俊
触媒討論会討論会A予稿集, 100th, 2007

表面増強赤外吸収分光による吸着水素が関与した4,4′-ビピリジンの酸化還元反応の追跡
内田太郎; 山方啓; 大澤雅俊
日本化学会北海道支部研究発表会講演要旨集, 2007, 2007

電極表面への4,4′-ビピリジンの吸着に伴なう水素発生の促進:表面増強赤外吸収分光による検討
内田太郎; 山方啓; 大澤雅俊
電気化学会大会講演要旨集, 74th, 2007

固体表面キャラクタリゼーション 機能性材料・ナノマテリアルのためのスペクトロスコピー (KS化学専門書)
山下 弘巳; 吉田 寿雄; 田中 庸裕, Contributor
講談社, Mar. 2022
ISBN:4065261260

エネルギー変換型光触媒
Takafumi Hisatomi; Jun Kubota; Kazunari Domen; Akira Yamakata, Contributor, コラム９ ｢時間分解過渡吸収分光法によるキャリアダイナミクスの解明｣
共立出版㈱, P106-107 Jun. 2017

光触媒/光半導体を利用した人工光合成－最先端科学から実装技術への発展を目指して－
Akira Yamakata, Joint work, 第3編第5章 光半導体による水分解の反応機構 時間分解分光測定を用いた光触媒のキャリアーダイナミクス
㈱NTS, p158-167 Jan. 2017

触媒の設計・反応制御 事例集－高活性、長寿命、低コスト化の実現－
Akira Yamakata, Joint work, 第8節 赤外分光法を用いた光触媒・光電極反応の解析
㈱技術情報協会, P761-769 Apr. 2013

人工光合成 実用化に向けた最新技術～水素利用・有機物合成・エネルギー・CO2還元～
Akira Yamakata, Joint work, 第6章第3節 光励起キャリアーの動きから見る水分解光触媒と水素貯蔵
㈱情報機構, p235-247 Mar. 2013

触媒技術の動向と展望2010
Akira Yamakata, Joint work, 第3-8章 時間分解赤外分光法を用いた触媒反応ダイナミクス －光触媒の光励起ダイナミクス－
触媒学会, p78-88 Apr. 2010

太陽電池と部材の開発・製造技術～構造・プロセスから見る、耐久性向上・高効率化を目指した各種事例～
Akira Yamakata, Joint work, 第4-3項 太陽電池用TiO2透明導電膜の製造技術
㈱情報機構, p227-236 Mar. 2010

色材・顔料・色素の設計と開発ー発色・着色メカニズムから各種応用製品まで
Akira Yamakata, Joint work, 第2-4章 酸化チタン
㈱情報機構, p267-280 Feb. 2008

光触媒材料の時間分解分光計測”
山方 啓
学術変革領域（A）超セラミックス公開シンポジウム, Jan. 2026, Invited

光触媒材料の時間分解分光計測
山方 啓
学術変革領域（A）超セラミックス公開シンポジウム, Jan. 2026, Invited

時間分解赤外分光法を用いた光触媒反応ダイナミクス
山方啓
日本分光学会中国四国支部令和7年度年次講演会, Jan. 2026, Invited

光触媒の過渡吸収スペクトル分析
山方啓
第 63 回触媒研究懇談会, Jul. 2025, Invited

光でつくる未来のエネルギー：水素製造材料の評価と潜在能力
山方啓
岡山大学ー信州大学 J-PEAKS連携シンポジウム, Mar. 2025, Invited

Time-Resolved IR Absorption Spectroscopy on Charge Carrier Dynamics in Non-Fullerene Acceptor
Akira Yamakata
ISDyEx 2024 the 12th International Symposium on Dynamic Exciton, Dec. 2024, Invited

The role of vacancies for the enhancement of photocatalytic activity
Akira Yamakata
5th International Conference on Emerging Advanced Nanomaterials ICEAN 2024, Nov. 2024, Invited

エネルギーと環境問題への挑戦～夢は実現可能か～
山方啓
岡山大学：公開講座, Nov. 2024, Invited

Behaviors of Photogenerated Charge Carriers at the Defects on Photocatalysts
Akira Yamakata
PRiME 2024, Oct. 2024, Invited

光触媒反応の活性向上を目指した欠陥制御
山方 啓
公益社団法人日本セラミックス協会 第 37 回秋季シンポジウム, Sep. 2024, Invited

Minimizing Voltage Loss of Organic Photovoltaics by Local Dipole Moment Change of Non-Fullerene Acceptors
Akira Yamakata
ICPAC MONGOLIA 2024, Aug. 2024, Invited

Defects Engineering for the Enhancement of Photocatalytic Reactions
Akira Yamakata
Taiwan International Conference on Catalysis 2024 (TICC 2024), Jun. 2024, Invited

Curious Behaviors of Photogenerated Charge Carriers on Particulate Photocatalysts
Akira Yamakata
AI-Mat International Workshop: Sustainable Energy Materials, Jun. 2024, Invited

Charge Separation Processes in Non-Fullerene Acceptors Studied By Time-Resolved IR
Akira Yamakata
245th Meeting of the Electrochemical Society, May 2024, Invited

時間分解赤外分光法を用いた光触媒と有機太陽電池の動作機構解明
山方啓
日本分光学会・赤外ラマン分光部会シンポジウム「機能性分子・材料の赤外ラマン分光による解析」, Mar. 2024, Invited

Femtosecond time-resolved IR absorption study of the charge carrier dynamics in NFAs
Akira Yamakata
International Symposium on Dynamic Exciton (ISDyEx) and International Symposium on Chiral Nanostructures for Photonique Applications, Dec. 2023, Invited

Binding States of Photogenerated Charge Carriers in Non-Fullerene Acceptors Studied by Broadband Transient Absorption Spectroscopy
Akira Yamakata
International Symposium on Dynamic Exciton (ISDyEx), Nov. 2023, Invited

Wideband Transient Absorption Spectroscopy of Dynamics Exciton
Akira Yamakata
International Summer Course of National Yang Ming Chiao Tung Univeristy (NYCY) 2023, Jun. 2023, Invited

Defects for the Enhancement of Photocatalytic Activity
Akira Yamakata
The 28th North American Catalysis Society Meeting, Jun. 2023, Invited

Observation of Free Carriers in Non-Fullerene Acceptors with Broadband Mid-Infrared Transient Absorption Spectroscopy
Akira Yamakata; Kosaku Kato; T. Urakami; M. Higashi; H. Sato; T. Umeyama; H. Imahori
243rd Meeting of the Electrochemical Society, May 2023, Invited

高速赤外分光を用いる光励起キャリアの挙動および光触媒反応機構の解明
山方 啓
日本化学会第103春季年会, Mar. 2023, Invited

時間分解分光計測を利用した高性能光触媒の開発
山方 啓
界面科学コロキウム「光物質変換をささえる分光計測」, Dec. 2022, Invited

Properties of Defects That Determine the Charge Carrier Dynamics in Photocatalysts
Akira Yamakata; Kosaku Kato; U. Uemura; K. Asakura
241st Meeting of the Electrochemical Society, May 2022, Invited

高性能光触媒の実現を目指した反応機構の解明
山方啓
光化学協会応用講座2021－社会実装が進む光触媒：基礎から人工光合成、新型コロナ対応まで－, Jan. 2022, Invited

太陽光を使って水から水素を製造できる光触媒の研究
山方啓
2021年度南山大学・豊田工業大学連携講演会, Nov. 2021, Invited

時間分解分光計測を利用した光触媒の高活性化因子の解明
山方啓
2021年度日本表面真空学会中部支部研究会「金属酸化物表面の成長・反応・計測」, Nov. 2021, Invited

Behavior of Photocarriers for the Remarkable Water Splitting Photocatalysts
Akira Yamakata; Kosaku Kato
The 11th Asian Photochemistry Conference (APC 2021), Nov. 2021, Invited

Charge Carrier Dynamics at the Heterojunctions Studied by Transient Absorption Spectroscopy
Akira Yamakata; Kosaku Kato
The 11th International Conference on Flexible and Printed Electronics (ICFPE) 2021, Oct. 2021, Invited

(JPA Award 2020 Award Lecture) Development of novel transient absorption spectroscopy and reaction dynamics for highly efficient photocatalysis
Akira Yamakata
2021年光化学討論会, Sep. 2021, Invited

Core-shell Double Doping for the Remarkable Photocatalytic Water Splitting on Ga2O3”
Akira Yamakata; Junie Jhon; M. Vequizo; Kosaku Kato; Yoshihisa Sakata
Light Energy Conversion with Metal Halide Perovskites, Semiconductor Nanostructures, and Inorganic/Organic Hybrid Materials symposium at 239th Meeting of the Electrochemical Society, Jun. 2021, Invited

半導体光触媒粒子中の欠陥が及ぼす光励起キャリアの再結合促進と抑制効果
山方啓
光機能材料研究会 第81回講演会 「光触媒材料の設計開発と光触媒反応解析の最新動向」, Mar. 2021, Invited

広帯域時間分解分光による動的エキシトン時間発展の追跡
山方啓
科研費・学術変⾰領域研究(A) 「動的エキシトン」 公募説明会・Kick‐off領域会議, Jan. 2021, Invited

Behavior of Photogenerated Charge Carriers on Powder Photocatalysts
Akira Yamakata
Materials Research Meeting 2019, Dec. 2019, Invited

Defects-induced enhancement of photocatalytic activity of Ga2O3 studied by time-resolved visible to mid-IR absorption spectroscopy
Akira Yamakata
The 36th International Japan-Korea Seminar on Ceramics (JK-Ceramics 36), Nov. 2019, Invited

レーザー分光を用いた光触媒反応機構の解明
Akira Yamakata
第29回キャラクタリゼーション講習会「触媒および表面の解析に役立つキャラクタリゼーションの基礎と実際」, Nov. 2019, Invited

Enhancement of photocatalytic activity of Ga2O3 by impurity doping
Akira Yamakata; Junie Jhon; M. Vequizo; Shouta Ishiyama; Taishi Hiramine; Yoshihisa Sakata
The 13th Pacific Rim Conference of Ceramic Societies (PACRIM13), Oct. 2019, Invited

Charge Carrier Dynamics on Powder Photocatalysts Studied by Time-resolved Visible to Mid-IR absorption
Akira Yamakata; Junie Jhon; M. Vequizo
International Conference on Photochemistry and Sustainable Energy (ICPSE 2019), Oct. 2019, Invited

Enhancement of photocatalytic activity of Ga2O3 based photocatalysts studied by time-resolved absorption spectroscopy
Akira Yamakata
The 24th International Conference on Semiconductor Photocatalysis and Solar Energy Conversion (SPASEC-24), Oct. 2019, Invited

Impurity Induced Enhancement of Photocatalytic Activity on Ga2O3
Akira Yamakata
International Congress on Pure & Applied Chemistry (ICPAC) Yangon 2019, Aug. 2019, Invited

Behaviour of Photogenerated Charge Carriers at the Defects on Photocatalysts
Akira Yamakata
The First Symposium on Photo (electro) catalysis (SOP-1), Jun. 2019, Invited

Defects for the Enhancement of Photocatalytic Activity
Akira Yamakata; Junie Jhon; M. Vequizo; Shouta Ishiyama; Taishi Hiramine; Yoshihisa Sakata
International Conference on Photocatalysis and Photoenergy 2019 (ICoPP2019), May 2019, Invited

高性能光触媒の設計を目指した反応機構の解明
Akira Yamakata
中央大学理工学部・研究セミナー, Jan. 2019, Invited

Curious Behaviors of Photogenerated Charge Carriers at the Defects on Powder Photocatalysts
Akira Yamakata
(Keynote) International Workshop on Crystalline Materials and Applications (IWCMA-2019), Jan. 2019, Invited

時間分解分光測定による高活性光触媒反応のメカニズム解明
Akira Yamakata
熊本大学工学部研究セミナー, Dec. 2018, Invited

Time-Resolved Visible to mid-IR Absorption Study of Photodynamics on Powder Photocatalysts
Akira Yamakata
Research Seminar at National Chiao Tung University, Nov. 2018, Invited

Curious Behavior of Photogenerated Electrons and Holes in Single-crystalline and Powder Photocatalysts
Akira Yamakata
Research Seminar at National Chung Hsing University, Nov. 2018, Invited

Time-resolved Absorption Study on the Behavior of Photogenerated Electrons and Holes in Highly Active Photocatalysts
Akira Yamakata; Junie Jhon; M. Vequizo
Functional Ceramics forum for the upcoming Annual Materials Science Conference, Nov. 2018, Invited

高活性光触媒の実現を目指した新しい分光測定技術の開発
Akira Yamakata
第11回ワークショップ 固体材料合成および評価技術の新展開, Nov. 2018, Invited

ポンププローブ法による界面ダイナミクス
Akira Yamakata
2018年電気化学会関東支部セミナー 先端計測技術による電極界面分析の新展開, Nov. 2018, Invited

過渡吸収分光測定を用いた光触媒粒子の光励起ダイナミクス
Akira Yamakata
第49回中部化学関係学協会支部連合秋季大会, Nov. 2018, Invited

時間分解分光測定を利用した高活性光触媒の反応機構解明
Akira Yamakata
第31回 日本セラミックス協会 秋季シンポジウム 特定セッション「先進的な構造科学と分析技術」, Sep. 2018, Invited

Behavior of Photogenerated Charge Carriers on Highly Efficient Photocatalysts
Akira Yamakata; Junie Jhon; M. Vequizo
The 8th Advanced Functional Materials and Devices (AFMD 2018), Aug. 2018, Invited

Effects of Surface Defects on Powder Photocatalysts Studied by Time-resolved Visible to Mid-IR Absorption Spectroscopy
Akira Yamakata; Junie Jhon; M. Vequizo
International Workshop on Water Splitting: Challenges and Opportunity, Aug. 2018, Invited

The Role of Powder Defects for Efficient Photocatalytic Reactions
Akira Yamakata
(Keynote) The 22nd International Conference on Photochemical Conversion and Storage of Solar Energy (IPS-22), Aug. 2018, Invited

Defects Induced Enhancement of Ga2O3 Based Photocatalysts Studied by Time-Resolved Absorption Spectroscopy
Akira Yamakata; Junie Jhon; M. Vequizo; Yoshihisa Sakata
2018 International Symposium on Advancement and Prospect of Catalysis Science & Technology, Jul. 2018, Invited

How the Defects Affects the Photocatalytic Activity on Powder and Single crystalline TiO2
Akira Yamakata
International Conference on Ceramic Materials and Components for Energy and Environmental Applications (CMCEE-12), Jul. 2018, Invited

Trapping-Induced Enhancement of Photocatalytic Activity on TiO2 Powders
Akira Yamakata; Junie Jhon; M. Vequizo
International Congress on Pure & Applied Chemistry (ICPAC) 2018, Mar. 2018, Invited

Behaviors of Photogenerated Electrons and Holes on TiO2 Powder Photocatalysts
Akira Yamakata
The 22nd International Conference on Semiconductor Photocatalysis & Solar Energy Conversion (SPASEC-22), Nov. 2017, Invited

Behaviors of Electrons and Holes in Photocatalysts Studied by Time-resolved Visible to Mid-IR Absorption Spectroscopy
Akira Yamakata
International Conference on Photochemistry and Its Applications (ICPA 2017), Nov. 2017, Invited

Mechanism of Photocatalytic Reactions on TiO2 Powders
Akira Yamakata
(Plenary) 19th SPVM National Physics Conference, 2017 ASEAN Conference on Advanced Functional Materials and Nanotechnology (ASEAN-AFMN), and 5th International Meeting on Complex Systems (IMCS), Oct. 2017, Invited

Impact of Metal Ion Doping on Ga2O3 Photocatalysts Studied by Transient Absorption Spectroscopy
Junie Jhon; M. Vequizo; Akira Yamakata
2017 ASEAN Conference on Advanced Functional Materials and Nanotechnology (ASEAN-AFMN), Oct. 2017, Invited

金属酸窒化物複合アニオン型光触媒のキャリアーダイナミクス
Akira Yamakata
新学術領域研究 (平成28〜32年度) 複合アニオン化合物の創製と新機能 第2回トピカル会議 (機能), Aug. 2017, Invited

Reaction dynamics at the liquid/solid soft-interfaces
Akira Yamakata
KAKENHI International Symposium on “Studying the Function of Soft Molecular Systems”, Jun. 2017, Invited

Behaviors of Photogenerated Electrons and Holes in Photoelectrochemical Interfaces
Akira Yamakata
International Symposium on Pure & Applied Chemistry (ISPAC) 2017, Jun. 2017, Invited

Dynamics of Photocarriers of Brookite TiO2 Studied by Spectroscopic Techniques: A Comparison with Anatase and Rutile TiO2 Photocatalysts
Junie Jhon; M. Vequizo; Hironori Matsunaga; Teruhisa Ohno; ○Akira Yamakata
第26回日本MRS年次大会, Dec. 2016, Invited

新しい分光技術を利用した光触媒反応の機構解明
Akira Yamakata
山口大学 光・エネルギー研究センターシンポジウム 光科学が生み出す新しい世界－光制御と分光技術の最前線－, Dec. 2016, Invited

時間分解分光測定を利用した金属微粒子を担持した光触媒のキャリアーダイナミクス
Akira Yamakata
第36回表面科学学術講演会, Nov. 2016, Invited

Dynamics of Photocarriers of Metal Nitrides/Oxynitrides Studied by Transient Absorption Spectroscopy: Controlling the Effects of Defects
Junie Jhon; M. Vequizo; Akira Yamakata; Mirabbos Hojamberdiev; Kenta Kawashima; Hajime Wagata; Kunio Yubuta; Shuji Oishi; Kazunari Domen; Katsuya Teshima
2016 International Conference on Materials Science and Nanotechnology (ICMSN), Oct. 2016, Invited

半導体光触媒の光励起ダイナミクス
Akira Yamakata
第2回 半導体による太陽光－水素エネルギー変換技術研究会, Oct. 2016, Invited

Curious Behaviors of Photogenerated e- and h+ in Anatase and Rutile TiO2 Powders
Akira Yamakata
IKM International Symposium on Pure & Applied Chemistry (ISPAC) 2016, Aug. 2016, Invited

Behavior of Photogenerated Electrons and Holes on Anatase and Rutile TiO2 Powders
Akira Yamakata
Collaborative Conference on 3D and Materials Research (CC3DMR) 2016, Jun. 2016, Invited

Behaviors of Photogenerated Charge Carriers in Single-Crystalline and Polycrystalline Powder SrTiO3
Akira Yamakata
2015 EMN Meeting on Photocatalysis (Energy Materials Nanotechnology), Nov. 2015, Invited

Control of behavior and energy state of photogenerated charge carriers on photocatalysts
Akira Yamakata
JSTさきがけ 光エネルギーと物質変換 領域研究成果報告会, Mar. 2015, Invited

時間分解分光測定を利用した光触媒の開発
Akira Yamakata
第32回無機材料に関する最近の研究成果発表会, Jan. 2015, Invited

時間分解赤外分光法を用いた光触媒反応ダイナミクス
Akira Yamakata
平成26年度日本分光学会中部支部講演会 (愛知地区), Dec. 2014, Invited

Behavior of Photogenerated Charge Carriers on Transition Metal Doped Visible-light Responsive SrTiO3 Photocatalysts
Akira Yamakata
Vietnam Malaysia International Chemical Congress (VMICC), Nov. 2014, Invited

光励起キャリアーの動きを制御した光触媒の開発
Akira Yamakata
日本表面科学会中部支部研究会, Oct. 2014, Invited

Charge Carrier Dynamics on Visible-Light Responsive Water-Splitting Photocatalysts
Akira Yamakata
(Plenary) 16th Samahang Pisika ng Visayas at Mindanao (SPVM) National Physics Conference, 2014 International Conference on Applied Physics and Materials Science (ICAMS2014), Oct. 2014, Invited

Behavior of Photogenerated Charge Carriers in the Visible Light Responsive Water Splitting LaTiO2N Photocatalysts Studied by Time-Resolved Visible to mid-IR Absorption Spectroscopy
Akira Yamakata
UK-Japan Solar Driven Fuel Synthesis Workshop: Materials, Understanding and Reactor Design, Sep. 2014, Invited

Electron and Hole Transfer from Photocatalyst to Cocatalysts Studied by Time-resolved Absorption Spectroscopy
Akira Yamakata; Masayuki Kawaguchi; Jun Kubota; Kazunari Domen
International Peradeniya University Research Sessions (iPURSE), Jul. 2014, Invited

Behavior of Photogeneraged Charge Carriers in Water Splitting Photocatalysts Studied by Timeresolved Absorption Spectroscopy
Akira Yamakata; Masayuki Kawaguchi; Jun Kubota; Kazunari Domen
EMN Spring Meeting (Energy Materials Nanotechnology) 2014, Mar. 2014, Invited

可視から赤外域の過渡吸収測定による光触媒反応の機構解明
Akira Yamakata
学術講演会 (神戸大学), Jan. 2014, Invited

Real-time observation of destruction of hydration shells around several cations at electrochemical interface
Akira Yamakata
Seventh International Conference on Advanced Vibrational Spectroscopy (ICAVS-7), Aug. 2013, Invited

Real-time observation of destruction processes of hydrophobic hydration shells at the electrified hydrophobic interface
Akira Yamakata
The 15th Asian Chemical Congress (15ACC), Aug. 2013, Invited

光触媒を利用した化学反応
Akira Yamakata
名工大オープンキャンパス4大学合同アフタヌーンセミナー, Jun. 2013, Invited

光触媒反応の時間分解赤外分光観察
Akira Yamakata
第43回中部化学関係学協会支部連合秋季大会, Nov. 2012, Invited

Time-resolved IR absorption study on water-splitting photoelectrodes
Akira Yamakata; Masaaki Yoshida; Jun Kubota; Masatoshi Osawa; Kazunari Domen
Cambodian Malaysian Chemical Conference (CMCC) 2012, Oct. 2012, Invited

Dynamics of photogenerated electrons in GaN photoelectrochemical systems
Akira Yamakata; Masaaki Yoshida; Jun Kubota; Masatoshi Osawa; Kazunari Domen
17th Malaysian Chemical Congress (17MCC), Oct. 2012, Invited

赤外分光法を用いた光触媒反応の解析
Akira Yamakata
第22回キャラクタリゼーション講習会 －触媒および表面のキャラクタリゼーションの原理と実例ー, Oct. 2012, Invited

FD講習を受けた二年目の常微分方程式
Akira Yamakata
FD推進ワークショップ, Aug. 2012, Invited

時間分解赤外分光法でみた光触媒のキャリアーダイナミクス
Akira Yamakata
ISSP ワークショップ 「表面・界面における輸送と変換」, Jul. 2012, Invited

Development and Mechanism of Water Splitting Photocatalysts
Akira Yamakata
Seminar at Department of Electrical Engineering, National Chung Hsing University, Jun. 2012, Invited

Real-time Observation of Destruction of Hydration Shells at Electrified Interfaces
Akira Yamakata
Workshop on Exploring the Structures and Dynamics of Water at Interfaces, Jun. 2012, Invited

電極表面に固定したKcsAの構造変化
山方 啓; 清水 啓史; 大澤 雅俊; 老木 成稔
第15回 ミニ公開シンポジウム イオンチャネル研究の現状とこれからについて考える, Jan. 2012, Invited

Surface-enhanced IR study on the dynamics of hydration shells around several cations at the electrochemical interface
Akira Yamakata; Masatoshi Osawa
The 14th Asian Chemical Congress 2011, Sep. 2011, Invited

Time-resolved IR absorption study on the destruction processes of hydration shells at electrode surfaces
Akira Yamakata; Masatoshi Osawa
The 14th Asian Chemical Congress 2011 –Cambodia Satellite Meeting, Sep. 2011, Invited

Time-resolved surface-enhanced infrared absorption study on destruction of hydration shells at the electrochemical interface
Akira Yamakata
Symposium on Advanced Spectroscopy, Oct. 2010, Invited

固液界面における溶質の水和殻崩壊過程の赤外分光観察
Akira Yamakata; Masatoshi Osawa
第106回触媒討論会, Sep. 2010, Invited

時間分解赤外分光法を用いた触媒反応機構の解明
Akira Yamakata
第50回オーロラセミナー, Aug. 2010, Invited

赤外分光法を用いた表面反応機構の解明
Akira Yamakata
2010年日本化学会北海道支部冬季研究発表会（北海道支部奨励賞受賞講演）, Jan. 2010, Invited

Structural changes of water layers between ions and a hydrophobic solid surface by their close contact
Akira Yamakata; Masatoshi Osawa
The second Asian Spectroscopy Conference, Nov. 2009, Invited

Reaction dynamics on catalysis studied by time-resolved IR absorption spectroscopy
Akira Yamakata; Masatoshi Osawa
日本分光学会年次講演会 (日本分光学会奨励賞受賞講演）, Nov. 2009, Invited

固液界面における準束縛溶媒分子の配向緩和ダイナミクス
Akira Yamakata
特定領域研究高次系分子科学公開シンポジウム, Nov. 2009, Invited

Orientation Dynamics of Solvent Molecules on Liquid/Solid Interfaces
Akira Yamakata
特定領域研究高次系分子科学公開シンポジウム, Jun. 2009, Invited

赤外分光・和周波発生分光法を用いた電極界面分子のダイナミクス
Akira Yamakata
科研費特定領域研究 高次系分子科学 第6回ミニ公開シンポジウム 表面・界面を観る非線形分光の新しい展開, Mar. 2009, Invited

電極界面における水分子の反応とダイナミクス
Akira Yamakata
触媒学会北海道地区札幌講演会 「触媒研究の近未来を語る」, Dec. 2008, Invited

時間分解赤外分光法を用いた電極表面に固定したタンパク質の構造とダイナミクス
Akira Yamakata
ミニ公開シンポジウム イオンチャネルの構造ダイナミクス, Jul. 2008, Invited

時間分解赤外分光法を用いた電極・触媒表面ダイナミクスの追跡
Akira Yamakata
神戸大学セミナー, Nov. 2007, Invited

Probing Ultrafast Electrode Dynamics by Picosecond Time-Resolved Surface-Enhanced Infrared Spectroscopy
Akira Yamakata; Jun Kubota; Masatoshi Osawa
Workshop on Electrocatalysis: Surface science approaches, Oct. 2006, Invited

Picosecond Time-resolved Surface Enhanced IR Absorption Study on Electrochemical Interface
Akira Yamakata; Jun Kubota; Masatoshi Osawa
Seminar at Department of Chemical Physics of Fritz-Haber-Institut der Max-Planck-Gesellschaft, Jul. 2006, Invited

時間分解赤外分光法でみた光触媒反応ダイナミクス
Akira Yamakata
上智大学物理学科談話会, Mar. 2005, Invited

時間分解赤外分光法を用いた二酸化チタン光触媒反応の観察
Akira Yamakata
第4回東京工業大学資源化学研究所フォーラム, Mar. 2005, Invited

時間分解赤外分光法を用いた二酸化チタン光触媒反応中間体の観察
Akira Yamakata
第24回表面科学講演大会, Nov. 2004, Invited

赤外分光法を用いた酸化チタン参照触媒の光励起ダイナミクス
Akira Yamakata; Taka-aki Ishibashi; Hiroshi Onishi
第25回参照触媒討論会, Sep. 2004, Invited

時間分解赤外分光法を用いた二酸化チタン光触媒反応中間体の観察
Akira Yamakata
第21回ライラックセミナー・第10回若手研究者交流会, Jun. 2004, Invited

二酸化チタン新規参照触媒の時間分解赤外分光測定
Akira Yamakata; Taka-aki Ishibashi; Hiroshi Onishi
第24回参照触媒討論会, Sep. 2003, Invited

Time-resolved Infrared Study of Photocatalytic Reactions on TiO2 Particles
Akira Yamakata; Taka-aki Ishibashi; Hiroshi Onishi
Seminar at Department of Physical Chemistry of Fritz-Haber-Institut der Max-Planck-Gesellschaft, Jun. 2003, Invited

酸化チタン参照触媒の時間分解赤外分光測定
Akira Yamakata; Taka-aki Ishibashi; Hiroshi Onishi
第23回参照触媒討論会, Sep. 2002, Invited

The Reactions of Photogenerated Carriers on Photocatalysts Studied by Time-resolved IR Spectroscopy
Akira Yamakata; Taka-aki Ishibashi; Hiroshi Onishi
CRC International Symposium on photochemistry @interfaces, Aug. 2002, Invited

広帯域時間分解分光による電荷分離過程の解析
山方啓
日本化学会第106春季年会・有機太陽電池を基軸とする有機エレクトロニクスの新展開, Invited

キャリアダイナミクスに立脚した光触媒の高活性化因子の解明
山方啓
2025年度日本化学会学術賞 受賞講演『日本化学会第106春季年会』, Invited

Defect Engineering From Recombination Centers to Functional Traps
Akira Yamakata
The 2nd RIST International Symposium: Carbon Value Science and Technology, Invited

Unraveling Charge Carrier Dynamics to Boost Photocatalytic Activity
Akira Yamakata
2025 International G-LAMP Symposium on Renewable Energy Technologies, Invited

Role of Heteroatom Doping in Modulating Charge Carrier Dynamics for Photocatalysis
Akira Yamakata
44th Symposium on Chemical Kinetics and Dynamics, Invited

Charge Carrier Dynamics for the Development of Highly Active Photocatalysts
Akira Yamakata
18th Taiwan-Japan Joint Symposium on Catalysis, Invited

The role of vacancies for the enhancement of photocatalytic activity
Akira Yamakata
12th Singapore International Chemistry Conference (SICC12), Invited

The role of oxygen vacancies for the enhancement of photocatalytic activity
Akira Yamakata; Kosaku Kato
International Congress on Pure & Applied Chemistry Kota Kinabalu (ICPAC Kota Kinabalu 2022), Invited

時間分解分光計測による光触媒の高活性化因子の解明
山方 啓
2022年電気化学秋季大会, Invited

THE JAPANESE PHOTOCHEMISTRY ASSOCIATION

THE ELECTROCHEMICAL SOCIETY OF JAPAN

THE SPECTROSCOPICAL SOCIETY OF JAPAN

CATALYSIS SOCIETY OF JAPAN

THE CHEMICAL SOCIETY OF JAPAN

THE SURFACE SCIENCE SOCIETY OF JAPAN

The Ceramic Society of Japan

分子科学会

Fundamental Understanding of the Highest-Activity Photocatalyst Enabled by Crystal-Facet-Controlled Carrier Transfer to Cocatalysts
Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B)
Yamaguchi University
01 Apr. 2025 - 31 Mar. 2029

Engineering of Charge Transfer at the Heterojunction
Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Research (Exploratory)
Okayama University
28 Jun. 2024 - 31 Mar. 2027

Development of remarkable photocatalysts based on charge carrier dynamics
Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A)
Okayama University
01 Apr. 2024 - 31 Mar. 2028

粉末系光触媒材料における欠陥の理解と制御
研究助成, 泉科学技術振興財団
泉科学技術振興財団
Oct. 2022 - Sep. 2024

反応機構に立脚した高活性可視光応答型光触媒の開発
環境研究助成, 八雲環境科学振興財団
Jun. 2022 - Mar. 2023

励起キャリア移動の指向性制御による高効率光触媒表面の構築
科学研究費助成事業, 日本学術振興会, 基盤研究(B)
山口大学
01 Apr. 2021 - 31 Mar. 2024

Dynamic Exciton: Emerging Science and Innovation
Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Grant-in-Aid for Transformative Research Areas (A)
Kyoto University
19 Nov. 2020 - 31 Mar. 2025

Wideband transient absorption spectroscopy for the analysis of dynamic exciton
Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Grant-in-Aid for Transformative Research Areas (A)
岡山大学
Nov. 2020 - Mar. 2025

表面欠陥準位を制御した新しい光触媒の開発
ENEOS水素基金
Nov. 2020 - Oct. 2021

人工光合成を実現する異種接合界面の光励起ダイナミクス
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
Toyota Technological Institute
Apr. 2020 - Mar. 2022

異種接合光触媒界面の光励起ダイナミクス
豊田工業大学・学内競争的資金 研究促進費
Jan. 2020 - Dec. 2020

欠陥準位を制御した高活性光触媒の開発
科研費・基盤研究B, 文科省
Apr. 2019 - Mar. 2022

複合アニオン化合物の光励起ダイナミクス
科研費・新学術領域研究, 文科省
Apr. 2019 - Mar. 2021

金属酸窒化物光触媒の光励起ダイナミクス
科研費・新学術領域研究, 文科省
Apr. 2017 - Mar. 2019

光触媒粒子のキャリアダイナミクス
共同利用・共同研究公募（戦略型）, 北海道大学触媒科学研究所
Apr. 2017 - Mar. 2018

原子層堆積装置を用いた光触媒の活性向上
研究促進費, 豊田工業大学・学内競争的資金
Oct. 2016 - Sep. 2017

表面欠陥の構造とエネルギーを制御した可視光応答型光触媒の高性能化
科研費・基盤研究B, 文科省
Apr. 2016 - Mar. 2019

柔らかな固液界面における化学反応ダイナミクス
科研費・新学術領域研究, 文科省
Apr. 2016 - Mar. 2018

粉末系光触媒の光励起ダイナミクス
共同利用・共同研究公募（課題設定型）, 北海道大学触媒科学研究所
Apr. 2016 - Mar. 2017

赤外分光を用いた酸化物光触媒の表面欠陥サイトの同定
物質･デバイス領域共同研究拠点共同研究, 東京工業大学資源化学研究所
Apr. 2015 - Mar. 2016

可視光応答型光触媒の開発
研究促進費, 豊田工業大学・学内競争的資金
Oct. 2011 - Mar. 2013

光励起キャリアーの動きとエネルギー制御
さきがけ研究, 科学技術振興機構
Apr. 2011 - Mar. 2017

固液界面での光励起キャリアダイナミクスに基づいた革新的水分解光触媒の開発
科研費・特別推進研究, 文科省
Apr. 2011 - Mar. 2016

可視光応答型光触媒のキャリア制御
科研費・基盤研究B, 文科省
Apr. 2011 - Mar. 2015

次代を担う超高効率集光型太陽光発電の日欧共同研究開発 (NGCPV)
革新的太陽光発電技術研究開発プロジェクト, NEDO
Apr. 2011 - Oct. 2014

酸化物半導体のバンドギャップ制御と光励起キャリアーの長寿命化
研究助成, 日本板硝子材料工学助成会
Apr. 2011 - Mar. 2012

ピコ秒時間分解赤外分光法を用いた可視光型光触媒の光励起キャリアーダイナミクス
研究助成, 豊田理研スカラー
Apr. 2011 - Mar. 2012

Development of intensity modulated infrared spectroscopy for analysis of photocatalytic reactions
Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Exploratory Research
The University of Kitakyushu
2011 - 2012

電極界面におけるイオンの水和構造ダイナミクス
科研費・特定領域研究, 文科省
Apr. 2010 - Mar. 2012

固液界面における準束縛溶媒分子の配向緩和ダイナミクス
科研費・特定領域研究, 文科省
Apr. 2008 - Mar. 2010

高活性水素発生電極触媒の開発と機構解明
若手教員イノベーション事業, 北海道大学ＧＣＯＥプログラム
Oct. 2007 - Mar. 2008

超高速電位ジャンプ法を用いた電子移動・電極反応ダイナミクスの赤外分光解析
科研費・若手研究A, 文科省
Apr. 2007 - Mar. 2010

会議名【210th Electrochemical Society (ECS) Meeting】・メキシコ
海外渡航費用, 電気化学会
Oct. 2006

固液界面反応の赤外分光イメージング
科研費・基盤研究Ｂ, 文科省
Apr. 2006 - Mar. 2008

ピコ秒時間分解表面増強振動分光法を用いた電極表面キャリアーダイナミクス
科研費・特定領域研究, 文科省
Apr. 2006 - Mar. 2008

赤外表面増強場を用いた振動誘起表面反応の制御
科研費・若手研究B, 文科省
Apr. 2005 - Mar. 2007

触媒学会参照触媒酸化チタンを利用する光触媒の標準化
科研費・基盤研究C, 文科省
Apr. 2004 - Mar. 2005

会議名【11th International conference on Time-resolved Vibrational Spectroscopy】・ イタリア
海外渡航費用, 吉田科学振興財団
Jun. 2003

光励起キャリアーの動的過程を観測した光触媒活性評価法の確立と触媒探索への応用
科研費・萌芽研究, 文科省
Apr. 2003 - Mar. 2005

微小電極界面における高速反応ダイナミクスの振動分光解析
科研費・基盤研究A, 文科省
Apr. 2002 - Mar. 2005

和周波分光法と赤外吸収分光法を用いたイオン液体(常温溶融塩)の界面分子構造の研究
科研費・基盤研究Ｂ, 文科省
Apr. 2002 - Mar. 2004

アナターゼ型およびルチル型二酸化チタン単結晶薄膜の合成と原子スケール評価
科研費・特定領域研究 公募, 文科省
Apr. 2002 - Mar. 2003

会議名【International Conference of Vibrations at Surfaces 10】・フランス
海外渡航費用, 新世代研究所
Jun. 2001

時間分解マルチプレックス表面和周波分光装置の開発
科研費・基盤研究Ｂ, 文科省
Apr. 2001 - Mar. 2004

時間分解赤外分光法による光触媒上の励起キャリアーによる吸着分子の反応過程観察
科研費・奨励研究A, 文科省
Apr. 2000 - Mar. 2002

赤外反射吸収分光法による反応条件下の表面反応の研究
科研費・特別研究員奨励費, 文科省
Apr. 1998 - Mar. 1999

構造物及びその製造方法, PCT国際特許 K04002US, Patent right
山方啓; Junie Jhon; M. Vequizo; Chandana Sampath; Kumara Ranasinghe

構造物及びその製造方法, 特願2017-013478, Patent right
山方啓; Junie Jhon; M. Vequizo; Chandana Sampath; Kumara Ranasinghe

拡散反射配置による時間分解分光装置, 特開2005-156229, 特願2003-392026, Patent right
大西 洋; 山方 啓; 石橋 孝章

時間分解赤外分光法による光触媒の迅速評価法, 特開2004-205256, 特願2002-371956, Patent right
大西 洋; 山方 啓; 石橋 孝章

プラズモンを用いたエネルギーアップコンバージョン -未使用エネルギー赤外光の活用方法に道-
京都大学化学研究所広報, 18 Oct. 2022, Internet

再生可能エネルギー実現の社会に向けて研究
タウンニュースてんぱくNo.823, 29 Jul. 2021, Paper

水・酸素から過酸化水素生成 九州工大と豊田工大、光触媒を開発
日刊工業新聞, 日刊工業新聞, ニュースリリース, 11 Jun. 2021, Paper

水と酸素から過酸化水素を生成する高性能光触媒の開発に成功 ― 次世代燃料の製造プロセス開発に向けて ―
九州工業大学・豊田工業大学, 25 May 2021, Internet

赤外光を電気エネルギーや信号に変換する無色透明な材料の開発 ―見えない電子デバイスの開発へ道―
京都大学化学研究所広報, 24 Jan. 2019, Internet

新しい赤外光誘起キャリア移動機構の発見 －赤外光のエネルギー利用に期待－
京都大学化学研究所広報, 13 Jun. 2018, Internet

「研究現場発」【光触媒を使って水素を製造する】
中部経済新聞朝刊, 28 May 2014, Paper

拓く研究人【光触媒で水素安く合成】
日刊工業新聞, 28 May 2014, Paper

“光励起キャリアーの動きとエネルギー制御”
化学経済, Dec. 2011, Paper