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Artificial Photosynthesis by Sodium Tantalate Photocatalysts: Multinational Collaboration in Fundamental Science

Research Project

Project/Area Number 18KK0161
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 36:Inorganic materials chemistry, energy-related chemistry, and related fields
Research InstitutionKobe University

Principal Investigator

Onishi Hiroshi  神戸大学, 理学研究科, 教授 (20213803)

Co-Investigator(Kenkyū-buntansha) 一國 伸之  千葉大学, 大学院工学研究院, 教授 (40261937)
丸山 伸伍  東北大学, 工学研究科, 准教授 (80732362)
橘田 晃宜  国立研究開発法人産業技術総合研究所, エネルギー・環境領域, 主任研究員 (90586546)
長嶋 宏樹  埼玉大学, 理工学研究科, 助教 (60814027)
Project Period (FY) 2018-10-09 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2021: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2020: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2019: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Keywords金属酸化物 / 半導体 / ドーピング / ペロブスカイト構造 / 電子-正孔再結合 / オペランド計測 / 人工光合成 / 放射光 / 電子励起状態 / 電子-正孔再結合 / 水素燃料 / 半導体光触媒 / 金属ドーピング / X線吸収分光 / 電荷分離 / 国際共同研究 / ヘテロエピタキシャル成長 / 濃度傾斜
Outline of Final Research Achievements

Metal cations, doped into semiconductor photocatalysts for artificial photosynthesis, are impurities that compromise the periodic structure of the host semiconductor. The cations curiously reduce electron-hole recombination and enhance the yield of photocatalytic reactions. To unravel this intriguing phenomenon, a multinational team was assembled to scrutinize the structure of the doped photocatalysts. Two metal-oxide semiconductors, sodium tantalate and strontium titanate, were doped with hetero-metal cations such as lanthanum, strontium, barium, iron, manganese, and others. The local structures of these infused cations were detailed using techniques such as fluorescence X-ray holography, X-ray absorption fine structure, and scanning transmission electron microscopy.

Academic Significance and Societal Importance of the Research Achievements

太陽光を用いて水を水素燃料に変換する化学反応(2H2O→2H2+O2)は広い意味での人工光合成である。CO2排出をともなわない持続可能な化学エネルギー供給の社会実装をめざして半導体光触媒の開発研究がすすんでいる。本研究ではこれまでに開発されてきた光触媒材料のうち最も反応収率が高いタンタル酸ナトリウムとチタン酸ストロンチウムに注目して、収率向上の鍵となる金属ドーピングの学理の一端を明らかにした。半導体光触媒が太陽光エネルギーを化学エネルギーへ転換するメカニズムを理解し、社会実装へむけたさらなる高機能化を支える知的基盤を提供する意義がある。

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (118 results)

All 2023 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (16 results) Journal Article (20 results) (of which Int'l Joint Research: 7 results,  Peer Reviewed: 19 results,  Open Access: 16 results) Presentation (57 results) (of which Int'l Joint Research: 17 results,  Invited: 19 results) Remarks (25 results)

  • [Int'l Joint Research] Wien Institute of Technology(オーストリア)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] National Research and Innovation Agency(インドネシア)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Karlsruhe Institute of Technology(ドイツ)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Jember University/National Research and Innovation Agency(インドネシア)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Wien Institute of Technology(オーストリア)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Universitas Jember(インドネシア)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Max Plank Institute/Bielefeld University/Karlsruhe Institute of Technology(ドイツ)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Eindhoven University of Technology(オランダ)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Benha University(エジプト)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Universitat Wien(オーストリア)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] カールスルーエ工科大学/ビーレフェルト大学/マックスプランク研究所(ドイツ)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] ウィーン大学(オーストリア)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] ノースウェスタン大学/プリンストン大学(米国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] ミラノビコッカ大学(イタリア)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] タンマサート大学(タイ)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] カールスルーエ工科大学/マックスプランク高分子研究所/ビーレフェルト大学(ドイツ)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Infrared and Near-Infrared Spectrometry of Anatase and Rutile Particles Bandgap Excited in Liquid2022

    • Author(s)
      Fu Zhebin、Onishi Hiroshi
    • Journal Title

      The Journal of Physical Chemistry B

      Volume: 127 Issue: 1 Pages: 321-327

    • DOI

      10.1021/acs.jpcb.2c07433

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] KTaO3 Wafers Doped with Sr or La Cations for Modeling Water-Splitting Photocatalysts: 3D Atom Imaging around Doping Cations2022

    • Author(s)
      Sasahara Akira、Kimura Koji、Sudrajat Hanggara、Happo Naohisa、Hayashi Kouichi、Onishi Hiroshi
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 126 Issue: 46 Pages: 19745-19755

    • DOI

      10.1021/acs.jpcc.2c06080

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 自己紹介および今後分子研で展開したい研究について2022

    • Author(s)
      大西洋
    • Journal Title

      分子研レターズ

      Volume: 86 Pages: 19-20

    • Related Report
      2022 Annual Research Report
    • Open Access
  • [Journal Article] Long-Life Electrons in Metal-Doped Alkali-Metal Tantalate Photocatalysts Excited under Water2021

    • Author(s)
      Fu Zhebin、Hirai Takuya、Onishi Hiroshi
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 125 Issue: 48 Pages: 26398-26405

    • DOI

      10.1021/acs.jpcc.1c06618

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Microelectrode-based transient amperometry of O<sub>2</sub> adsorption and desorption on a SrTiO<sub>3</sub> photocatalyst excited under water2021

    • Author(s)
      Kosaka Takumu、Ando Tomohiro、Hisatomi Takashi、Nishiyama Hiroshi、Zhou Yuanshu、Domen Kazunari、Takahashi Yasufumi、Onishi Hiroshi
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 23 Issue: 35 Pages: 19386-19393

    • DOI

      10.1039/d1cp03264j

    • NAID

      120007144968

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Dependence of Photoexcited Electron Behavior on Octahedral Distortion in Barium-Doped NaTaO<sub>3</sub> Photocatalysts2021

    • Author(s)
      Sudrajat Hanggara、Kitta Mitsunori、Katoh Ryuzi、Ichikuni Nobuyuki、Onishi Hiroshi
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 125 Issue: 30 Pages: 16403-16412

    • DOI

      10.1021/acs.jpcc.1c03334

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Direct confirmation of the dopant site in indium-doped SrTiO<sub>3</sub> photocatalyst via atomic-scale analytical transmission electron microscopy imaging2021

    • Author(s)
      Kitta Mitsunori、Taguchi Noboru、Sudrajat Hanggara、Onishi Hiroshi
    • Journal Title

      Applied Physics Letters

      Volume: 118 Issue: 15 Pages: 153901-153901

    • DOI

      10.1063/5.0047290

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The role of the shell in core-shell-structured La-doped NaTaO3 photocatalysts2021

    • Author(s)
      Sudrajat Hanggara、Kitta Mitsunori、Ito Ryota、Yoshida Tomoko、Katoh Ryuzi、Ohtani Bunsho、Ichikuni Nobuyuki、Onishi Hiroshi
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 23 Issue: 14 Pages: 8868-8879

    • DOI

      10.1039/d1cp00375e

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] タンタル酸アルカリ光触媒:金属カチオンドーピングによる量子収率向上メカニズム2021

    • Author(s)
      大西洋
    • Journal Title

      触媒

      Volume: 63 Pages: 108-114

    • NAID

      40022577405

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Preparation of the NaTaO<sub>3</sub> Crystal from the KTaO<sub>3</sub> Substrate via Topotactic Alkaline Cation Substitution as Confirmed by Transmission Electron Microscopy2020

    • Author(s)
      Kitta Mitsunori、Onishi Hiroshi
    • Journal Title

      e-Journal of Surface Science and Nanotechnology

      Volume: 18 Issue: 0 Pages: 32-37

    • DOI

      10.1380/ejssnt.2020.32

    • NAID

      130007801503

    • ISSN
      1348-0391
    • Year and Date
      2020-02-22
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Water-Splitting Activity of La-Doped NaTaO3 Photocatalysts Sensitive to Spatial Distribution of Dopants2020

    • Author(s)
      Sudrajat Hanggara、Kitta Mitsunori、Ito Ryota、Nagai Sota、Yoshida Tomoko、Katoh Ryuzi、Ohtani Bunsho、Ichikuni Nobuyuki、Onishi Hiroshi
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 124 Issue: 28 Pages: 15285-15294

    • DOI

      10.1021/acs.jpcc.0c03822

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Dopant site in indium-doped SrTiO3 photocatalysts2020

    • Author(s)
      Sudrajat Hanggara、Fadlallah Mohamed M.、Tao Shuxia、Kitta Mitsunori、Ichikuni Nobuyuki、Onishi Hiroshi
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 22 Issue: 34 Pages: 19178-19187

    • DOI

      10.1039/d0cp02822c

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Artificially Designed Compositionally Graded Sr-Doped NaTaO3 Single-Crystalline Thin Films and the Dynamics of Their Photoexcited Electron?Hole Pairs2020

    • Author(s)
      Konno Rio、Maruyama Shingo、Kosaka Takumu、Katoh Ryuzi、Takahashi Ryota、Kumigashira Hiroshi、Ichikuni Nobuyuki、Onishi Hiroshi、Matsumoto Yuji
    • Journal Title

      Chemistry of Materials

      Volume: 33 Issue: 1 Pages: 226-233

    • DOI

      10.1021/acs.chemmater.0c03487

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Visible light responsive La and Fe co-doped NaTaO3 photocatalysts: Local structure around dopants2020

    • Author(s)
      Sudrajat Hanggara、Ichikuni Nobuyuki、Onishi Hiroshi
    • Journal Title

      Chemical Physics

      Volume: 531 Pages: 110648-110648

    • DOI

      10.1016/j.chemphys.2019.110648

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Single-Crystal Model of Highly Efficient Water-Splitting Photocatalysts: A KTaO3 Wafer Doped with Calcium Cations2020

    • Author(s)
      Fujiwara Tomoya、Sasahara Akira、Happo Naohisa、Kimura Koji、Hayashi Kouichi、Onishi Hiroshi
    • Journal Title

      Chemistry of Materials

      Volume: 32 Issue: 4 Pages: 1439-1447

    • DOI

      10.1021/acs.chemmater.9b04094

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Preparation of Visible-light Responsive Rutile-TiO<sub>2</sub>(110) Wafer with Well-defined Surface by Chromium and Antimony Codoping2019

    • Author(s)
      Kitta Mitsunori、Onishi Hiroshi
    • Journal Title

      e-Journal of Surface Science and Nanotechnology

      Volume: 17 Issue: 0 Pages: 5-9

    • DOI

      10.1380/ejssnt.2019.5

    • NAID

      130007595417

    • ISSN
      1348-0391
    • Year and Date
      2019-02-14
    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Electron Population and Water Splitting Activity Controlled by Strontium Cations Doped in KTaO3 Photocatalysts2019

    • Author(s)
      Sudrajat Hanggara、Dhakal Dikshya、Kitta Mitsunori、Sasaki Takuro、Ozawa Akiyo、Babel Sandhya、Yoshida Tomoko、Ichikuni Nobuyuki、Onishi Hiroshi
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 123 Issue: 30 Pages: 18387-18397

    • DOI

      10.1021/acs.jpcc.9b03640

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Double Doping of NaTaO3 Photocatalysts with Lanthanum and Manganese for Strongly Enhanced Visible-Light Absorption2019

    • Author(s)
      Sudrajat Hanggara、Kitta Mitsunori、Ichikuni Nobuyuki、Onishi Hiroshi
    • Journal Title

      ACS Applied Energy Materials

      Volume: 2 Issue: 10 Pages: 7518-7526

    • DOI

      10.1021/acsaem.9b01504

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Sodium Tantalate Photocatalysts Doped with Metal Cations: Why Are They Active for Water Splitting?2019

    • Author(s)
      Onishi Hiroshi
    • Journal Title

      ChemSusChem

      Volume: 印刷中 Issue: 9 Pages: 1825-1834

    • DOI

      10.1002/cssc.201802935

    • Related Report
      2019 Research-status Report 2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The atomic-scale structure of LaCrO3-NaTaO3 solid solution photocatalysts with enhanced electron population2019

    • Author(s)
      Sudrajat Hanggara、Zhou Yizhong、Sasaki Takuro、Ichikuni Nobuyuki、Onishi Hiroshi
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 21 Issue: 9 Pages: 5148-5157

    • DOI

      10.1039/c8cp07688j

    • NAID

      120006604669

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] アルミニウムをドープしたSrTiO3(100), (110), (111)単結晶面のAFM計測2023

    • Author(s)
      松井恭平; 大西洋
    • Organizer
      日本化学会第103春季年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 酸化チタンに吸着したピバル酸の液中全反射赤外分光計測2023

    • Author(s)
      付哲斌; 大西洋
    • Organizer
      第131回触媒討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 水中ですすむ触媒反応のオペランド計測:光触媒の事例2023

    • Author(s)
      大西洋
    • Organizer
      第445回触媒科学研究所コロキウム
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 水中で定常光励起した半導体光触媒の赤外-近赤外分光:ダイアモンドATRプリズムを用いたオペランド計測2022

    • Author(s)
      付哲斌; 大西洋
    • Organizer
      表面界面スペクトロスコピー2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] 大西洋. 半導体光触媒のオペランド界面計測:ダイアモンドプリズムを用いた光学分光と溶存酸素の高速検出2022

    • Author(s)
      大西洋
    • Organizer
      実用表面分析セミナー2022
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 半導体光触媒をもちいた人工光合成反応のオペランド計測:溶存酸素の高速検出とダイアモンドプリズムを用いた光学分光2022

    • Author(s)
      大西洋
    • Organizer
      日本オプトメカトロニクス協会第2回フォトンテクノロジー技術部会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 水中で定常光励起した酸化チタン光触媒の光吸収:ATRプリズムを用いた赤外-近赤外分光2022

    • Author(s)
      付哲斌; 大西洋
    • Organizer
      第130回触媒討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] アルミニウムドーピングによるチタン酸ストロンチウムの表面構造変化2022

    • Author(s)
      松井恭平; 大西洋
    • Organizer
      第130回触媒討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] タンタル酸ナトリウム光触媒から生成する溶存酸素のマイクロ電極による検出2022

    • Author(s)
      細川大地; 村上環; 大西洋
    • Organizer
      第130回触媒討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 電子スピン共鳴法を用いたチタン酸ストロンチウム光触媒におけるキャリアの励起電子構造の解明2022

    • Author(s)
      付哲斌; 平井琢也; 婦木正明; 小堀康博; 大西洋
    • Organizer
      第16回分子科学討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] AFM Imaging of Highly Efficient Semiconductor Photocatalysts for Artificial Photosynthesis: SrTiO3 Wafers Doped with Aluminum Cations2022

    • Author(s)
      Matsui, K.; Onishi, H.
    • Organizer
      The 22nd International Vacuum Congress (IVC-22)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Scanning Electrochemical Microscopy for Time-Resolved Detection of O2 Released on Semiconductor Photocatalysts under Water2022

    • Author(s)
      Kosaka, T.; Hosokawa, D.; Murakami, M.; Onishi, H.
    • Organizer
      The 22nd International Vacuum Congress (IVC-22)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Infrared Absorption of Semiconductor Photocatalysts Excited under Water: Operando Study with an ATR Prism2022

    • Author(s)
      Fu, Z.; Onishi, H.
    • Organizer
      12th International Conference on Environmental Catalysis (ICEC2022)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 水中拡散する酸素のマイクロ電極による時間分解検出2022

    • Author(s)
      大西洋
    • Organizer
      第4回先端膜工学研究センター成果発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Infrared Absorption of Metal-Oxide Photocatalysts Excited under Water2022

    • Author(s)
      Fu, Z.; Onishi, H.
    • Organizer
      9th Tokyo Conference on Advanced Catalytic Science and Technology (TOCAT9)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Semiconductor Photocatalysts for Artificial Photosynthesis: Operando Characterization under Water2022

    • Author(s)
      Onishi, H.
    • Organizer
      Seminar at RIKEN
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] タンタル酸ナトリウム光触媒による水全分解反応生成物の時間分解検出2022

    • Author(s)
      細川大地; 高坂拓夢; 安藤智洋; 高橋康史; 大西洋
    • Organizer
      第129回触媒討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] アルミニウムをドーピングしたチタン酸ストロンチウム光触媒の単結晶モデル構築2022

    • Author(s)
      松井恭平; 大西洋
    • Organizer
      第129回触媒討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] 全反射赤外分光で水中観測した酸化チタン光触媒の電子励起状態2022

    • Author(s)
      付哲斌; 大西洋
    • Organizer
      第129回触媒討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] 水の完全分解で生成する溶存酸素のマイクロ電極による時間分解検出2022

    • Author(s)
      大西洋; 髙坂拓夢; 高橋康史; 久富隆史; 堂免一成
    • Organizer
      第129回触媒討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] タンタル酸ナトリウム光触媒の軟X線吸収分光:紫外光励起による酸素K吸収端の変化2022

    • Author(s)
      平井琢也; 長坂将成; 一國伸之; 大西洋
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] タンタル酸カリウム単結晶基板上でのタンタル酸ナトリウムの配向制御2022

    • Author(s)
      橘田晃宜; 大西洋
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 半導体光触媒による水の全分解反応:マイクロ電極による生成酸素の時間分解検出2022

    • Author(s)
      大西洋
    • Organizer
      電気化学会第89回大会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] An ATR-IR Scheme for Operando Characterization of Semiconductor Photocatalysts2022

    • Author(s)
      Onishi, H.
    • Organizer
      International Iwasawa Conference 2022
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 半導体光触媒のオペランド計測:赤外分光とマイクロ電気化学2022

    • Author(s)
      大西洋
    • Organizer
      触媒学会西日本支部キャラクタリゼーション講習会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Time-Resolved Detection of Oxygen Released in Overall Water Splitting Reaction over SrTiO3 Photocatalysts,2021

    • Author(s)
      Kosaka, T.; Teduka, Y.; Ogura, T.; Zhou, Y.; Takahashi, Y.; Hisatomi, T.; Nishiyama, H.; Domen, K.; Onishi, H.
    • Organizer
      The International Chemical Congress of Pacific Basin Societies 2020 (Pacifichem2020)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Scanning Electrochemical Microscopy for Operand Detection of O2 Released on a SrTiO3 Photocatalyst Excited under Water,2021

    • Author(s)
      Kosaka, T.; Ando, T.; Takahashi, Y.; Hisatomi, T.; Nishiyama, H.; Domen, K.; Onishi, H.
    • Organizer
      29th International Colloquium on Scanning Probe Microscopy (ICSPM29)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Microelectrode-Based Transient Amperometry of O2 Evolution on a SrTiO3 Photocatalyst Excited under Water2021

    • Author(s)
      Kosaka, T.; Zhou, Y.; Hisatomi, T.; Nishiyama, H.; Domen, K.; Takahashi, Y.; Onishi, H.
    • Organizer
      International Symposium on Surface Science (ISSS-9)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] タンタル酸ナトリウム光触媒から生成する酸素の水中時間分解検出2021

    • Author(s)
      細川大地; 高坂拓夢; 周縁殊; 高橋康史; 大西洋
    • Organizer
      第128回触媒討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] 全反射赤外分光で観測した水中タンタル酸アルカリ光触媒の長寿命電子励起状態2021

    • Author(s)
      付哲斌; 平井琢也; 大西洋
    • Organizer
      第128回触媒討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] Metal Cation Doping to Perovskite-Structured Compounds for Artificial Photosynthesis2021

    • Author(s)
      Onishi, H.
    • Organizer
      The 1st Japan-China Symposium on Catalysis (1stJCSC)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] チタン酸ストロンチウム光触媒による水分解反応:マイクロ電極を用いた溶存酸素濃度変化の時間分解計測2021

    • Author(s)
      大西洋
    • Organizer
      日本セラミックス協会第34回秋季シンポジウム
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 原子分解能STEM-EDSマッピングによるSrTiO3格子内のインジウムドーパントサイトの直接観察2021

    • Author(s)
      橘田晃宜, 田口昇, Hanggara Sudrajat, 大西洋
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] NiO助触媒を担持したタンタル酸ナトリウム光触媒の電子スピン共鳴による計測評価2021

    • Author(s)
      平井琢也, 婦木正明, 長友敬晃, 付哲斌, 小堀康博, 大西洋
    • Organizer
      日本化学会第101春季年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Semiconductor photocatalysts for artificial photosynthesis2020

    • Author(s)
      Hiroshi Onishi
    • Organizer
      International Lecture Series: Chemical Innovation for Sustainable Future, Universitas Jember, Indonesia
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] ESRを用いたNaTaO3光触媒の光励起状態観測2020

    • Author(s)
      平井琢也, 婦木正明, 長友敬晃, 付哲斌, 小堀康博, 大西洋
    • Organizer
      第39回光がかかわる触媒化学シンポジウム
    • Related Report
      2020 Research-status Report
  • [Presentation] 金属カチオンドーピングによるタンタル酸ナトリウム光触媒の収率向上メカニズム2020

    • Author(s)
      大西洋
    • Organizer
      大阪市立大学人工光合成研究拠点共同利用・ 共同研究成果報告会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Interaction of Water with the Oxide Interfaces: Srtio3 and Mgo Viewed by Sumfrequencyx Generation Spectroscopy2020

    • Author(s)
      Buessler, M.; Maruyama, S.; Onishi, H.; Sun, S.; Backus, E.
    • Organizer
      Winter School, Investigating Solid-Liquid Interfaces: the Calcite-Water Interface at the Molecular Level, Bielefeld
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Water Splitting Activity of La-Doped Natao3 Photocatalysts Sensitive to Spatial Distribution of Dopants2020

    • Author(s)
      Sudrajat, H.; Kitta, M.; Ito, R.; Nagai, S.; Yoshida, T.; Katoh, R.; Ohtani, B.; Ichikuni, N.; Onishi, H.
    • Organizer
      化学系学協会北海道支部2020年冬季研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] 金属ドーピング光触媒の局所構造解析2019

    • Author(s)
      大西洋
    • Organizer
      「サステイナブル社会のための最先端触媒化学・表面科学」講演会~岩澤先生御受勲記念講演会~
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Fluorescence Study of Sodium Tantalate Photocatalysts Doped with Lanthanoid Cations2019

    • Author(s)
      Song, D.; Sudrajat, H.; Tachikawa, T.; Onishi, H.
    • Organizer
      International Workshop on Frontier of Science and Technology for Solar Energy Conversion
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Three-Dimensional Analysis of Ca Dopant Atoms in a KTaO3(100) Wafer2019

    • Author(s)
      Fujiwara, T.; Sasahara, A.; Kimura, K.; Sudrajat, H.; Happo, N.; Hayashi, K.; Onishi, H.
    • Organizer
      14th International Conference on the Structure of Non-Crystalline Materials (NMC-14)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Sodium Tantalate Photocatalysts Doped with Metal Cations: Why So Active for Water Splitting?2019

    • Author(s)
      Onishi, H.
    • Organizer
      15th Nanoscience and Nanotechnology Conference (NanoTR-15)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] PLD法を用いた傾斜組成srドープNaTaO3薄膜の作製2019

    • Author(s)
      金野莉央; 丸山伸伍; 大西洋; 松本祐司
    • Organizer
      2019年日本表面真空学会学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Natao3光触媒による水全分解反応:どうしてそんなに活性が高いのか2019

    • Author(s)
      大西洋
    • Organizer
      信州大学講演会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Artificially Designed Compositionally-Grade Sr-Doped NaTaO3 Thin Films2019

    • Author(s)
      Konno, R.; Maruyama, S.; Sato, T.; Kosaka, T.; Onishi, H.; Matsumoto, Y.
    • Organizer
      19th International Conference on Solid Films and Surfaces (ICSFS19)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Sr-Doped KTaO3 Photocatalysts, Calcination-Temperature-Dependent Properties2019

    • Author(s)
      Dai, N.; Onishi, H.
    • Organizer
      第124回触媒討論会
    • Related Report
      2019 Research-status Report
  • [Presentation] LaとCrをダブルドープしたNaTaO3光触媒のXAFSによる構造解析2019

    • Author(s)
      一國伸之; Sudrajat, H.; 周以重; 佐々木拓朗; 大西洋
    • Organizer
      第22回XAFS討論会
    • Related Report
      2019 Research-status Report
  • [Presentation] NaTaO3光触媒による人工光合成:どうしてそんなに活性が高いのか2019

    • Author(s)
      大西洋
    • Organizer
      界面分子変換研究会ワークショップ
    • Related Report
      2019 Research-status Report 2018 Research-status Report
    • Invited
  • [Presentation] 金属ドープタンタル酸カリウムの蛍光X線ホログラフィー解析2019

    • Author(s)
      笹原亮; 木村耕治; Sudrajat, H.; 八方直久; 林好一; 大西洋
    • Organizer
      第123回触媒討論会
    • Related Report
      2018 Research-status Report
  • [Presentation] Enhancing the Population of Photoexcited Electrons in NaTaO3 Via Codoping with Lanthanum and Manganese2019

    • Author(s)
      Sudrajat, H.; Sasaki, T.; Ichikuni, N.; Onishi, H.
    • Organizer
      第123回触媒討論会
    • Related Report
      2018 Research-status Report
  • [Presentation] Electron Population and Hydrogen Evolution Rate Controlled by Concentration Gradient of Strontium Cations Doped in KTaO3 Photocatalysts2019

    • Author(s)
      Sudrajat, H.; Dhakal, D.; Sasaki, T.; Ozawa, A.; Babel, S.; Yoshida, T.; Ichikuni, N.; Onishi, H.
    • Organizer
      Gordon Research Conference on Chemical Reactions at Surfaces, Instructive Surfaces: From Guiding Chemical Reactions to Controlling Protein Adhesion
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Atom-Scale and Nano-Scale Architectures of NaTaO3 Photocatalysts Doped with Guest Metal Cations2019

    • Author(s)
      Onishi, H.
    • Organizer
      Gordon Research Conference on Chemical Reactions at Surfaces, Instructive Surfaces: From Guiding Chemical Reactions to Controlling Protein Adhesion
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] NaTaO3光触媒による人工光合成:どうしてそんなに活性が高いのか2019

    • Author(s)
      大西洋
    • Organizer
      千葉大学工学研究院サブ領域勉強会:先端計測に学ぶ材料開発の指針
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] NaTaO3光触媒による人工光合成:どうしてそんなに活性が高いのか2019

    • Author(s)
      大西洋
    • Organizer
      日本大学工学部講演会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] 半導体光触媒による酸素生成反応:走査型電気化学顕微鏡による時間分解計測のシミュレーション2018

    • Author(s)
      高坂拓夢; 手塚裕也; 小椋拓也; 周縁殊; 高橋康史; 大西洋
    • Organizer
      2018年度第3回関西電気化学研究会
    • Related Report
      2018 Research-status Report
  • [Presentation] 半導体光触媒による酸素生成反応:走査型電気化学顕微鏡による溶存酸素の時間分解検出2018

    • Author(s)
      手塚裕也; 小椋拓也; 高坂拓夢; 周縁殊; 高橋康史; 大西洋
    • Organizer
      2018年度第3回関西電気化学研究会
    • Related Report
      2018 Research-status Report
  • [Remarks] 神戸大学理学研究科化学専攻 大西研究室

    • URL

      https://www.edu.kobe-u.ac.jp/sci-onishi/

    • Related Report
      2022 Annual Research Report
  • [Remarks] 神戸大学理学研究科化学専攻 大西研究室(英語版)

    • URL

      https://www.edu.kobe-u.ac.jp/sci-onishi/index-E.html

    • Related Report
      2022 Annual Research Report
  • [Remarks] 神戸大学理学研究科化学専攻 大西研究室(インドネシア語版)

    • URL

      https://www.edu.kobe-u.ac.jp/sci-onishi/index-I.html

    • Related Report
      2022 Annual Research Report
  • [Remarks] 神戸大学理学研究科化学専攻 大西研究室(中国語版)

    • URL

      https://www.edu.kobe-u.ac.jp/sci-onishi/index-C.html

    • Related Report
      2022 Annual Research Report
  • [Remarks] 神戸大学理学研究科化学専攻 大西研究室(タイ語版)

    • URL

      https://www.edu.kobe-u.ac.jp/sci-onishi/index-T.html

    • Related Report
      2022 Annual Research Report
  • [Remarks] 神戸大学理学研究科大西研究室(日本語版)

    • URL

      https://www.edu.kobe-u.ac.jp/sci-onishi/

    • Related Report
      2021 Research-status Report
  • [Remarks] 神戸大学理学研究科大西研究室(英語版)

    • URL

      https://www.edu.kobe-u.ac.jp/sci-onishi/index-E.html

    • Related Report
      2021 Research-status Report
  • [Remarks] 神戸大学理学研究科大西研究室(インドネシア語版)

    • URL

      https://www.edu.kobe-u.ac.jp/sci-onishi/index-I.html

    • Related Report
      2021 Research-status Report
  • [Remarks] 分子科学研究所物質分子科学研究領域大西グループ(日本語版)

    • URL

      https://www.ims.ac.jp/research/group/onishi/

    • Related Report
      2021 Research-status Report
  • [Remarks] 分子科学研究所物質分子科学研究領域大西グループ(英語版)

    • URL

      https://www.ims.ac.jp/en/research/group/onishi/

    • Related Report
      2021 Research-status Report
  • [Remarks] 神戸大学理学研究科化学専攻 大西研究室(日本語ページ)

    • URL

      http://www.edu.kobe-u.ac.jp/sci-onishi/

    • Related Report
      2020 Research-status Report
  • [Remarks] 神戸大学理学研究科化学専攻 大西研究室(英語ページ)

    • URL

      http://www.edu.kobe-u.ac.jp/sci-onishi/index-E.html

    • Related Report
      2020 Research-status Report
  • [Remarks] 神戸大学理学研究科化学専攻 大西研究室(中国語ページ)

    • URL

      http://www.edu.kobe-u.ac.jp/sci-onishi/index-C.html

    • Related Report
      2020 Research-status Report
  • [Remarks] 神戸大学理学研究科化学専攻 大西研究室(インドネシア語ページ)

    • URL

      http://www.edu.kobe-u.ac.jp/sci-onishi/index-I.html

    • Related Report
      2020 Research-status Report
  • [Remarks] 神戸大学理学研究科化学専攻 大西研究室(タイ語ページ)

    • URL

      http://www.edu.kobe-u.ac.jp/sci-onishi/index-T.html

    • Related Report
      2020 Research-status Report
  • [Remarks] 神戸大学理学研究科化学専攻 大西研究室

    • URL

      http://www.edu.kobe-u.ac.jp/sci-onishi/index.html

    • Related Report
      2019 Research-status Report
  • [Remarks] 同上(英語版)

    • URL

      http://www.edu.kobe-u.ac.jp/sci-onishi/index-E.html

    • Related Report
      2019 Research-status Report
  • [Remarks] 同上(中国語版)

    • URL

      http://www.edu.kobe-u.ac.jp/sci-onishi/index-C.html

    • Related Report
      2019 Research-status Report
  • [Remarks] 同上(韓国語版)

    • URL

      http://www.edu.kobe-u.ac.jp/sci-onishi/index-K.html

    • Related Report
      2019 Research-status Report
  • [Remarks] 同上(インドネシア語版)

    • URL

      http://www.edu.kobe-u.ac.jp/sci-onishi/index-I.html

    • Related Report
      2019 Research-status Report
  • [Remarks] 神戸大学理学研究科化学専攻大西研究室(日本語サイト)

    • URL

      http://www.edu.kobe-u.ac.jp/sci-onishi/

    • Related Report
      2018 Research-status Report
  • [Remarks] 神戸大学理学研究科化学専攻大西研究室(英語サイト)

    • URL

      http://www.edu.kobe-u.ac.jp/sci-onishi/index-E.html

    • Related Report
      2018 Research-status Report
  • [Remarks] 神戸大学理学研究科化学専攻大西研究室(中国語サイト)

    • URL

      http://www.edu.kobe-u.ac.jp/sci-onishi/index-C.html

    • Related Report
      2018 Research-status Report
  • [Remarks] 神戸大学理学研究科化学専攻大西研究室(韓国語サイト)

    • URL

      http://www.edu.kobe-u.ac.jp/sci-onishi/index-K.html

    • Related Report
      2018 Research-status Report
  • [Remarks] 神戸大学理学研究科化学専攻大西研究室(インドネシア語サイト)

    • URL

      http://www.edu.kobe-u.ac.jp/sci-onishi/index-I.html

    • Related Report
      2018 Research-status Report

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Published: 2018-10-12   Modified: 2024-01-30  

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