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Improvement of Z-scheme photocatalysis based on control of electron transfer utilizing electrochemical techniques

Research Project

Project/Area Number 21K05240
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 36020:Energy-related chemistry
Research InstitutionThe University of Tokyo (2022-2023)
Tohoku University (2021)

Principal Investigator

Kumagai Hiromu  東京大学, 先端科学技術研究センター, 特任准教授 (80761311)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords半導体光触媒 / 人工光合成 / 電気化学 / 電子伝達 / Zスキーム / 光触媒 / 半導体
Outline of Research at the Start

可視光を用いた2光子励起(Zスキーム)型光触媒反応について,光触媒間の光励起電子の伝達過程に着目した反応系とその解析手法の開発を行う。光触媒とそれをつなぐ電子伝達剤の電位関係を詳細に設計し,触媒活性に及ぼす影響について系統的な知見を確立する。加えて,実反応に近い条件下での電気化学手法による電子伝達過程の解析・制御手法の開発を行う。これらを通じて高い活性と機能を発現する光触媒系の実現を目指す。

Outline of Final Research Achievements

The study focused on deepening knowledge of the transfer process of photoexcited electrons between photocatalysts, which is assumed to be a bottleneck in improving the activity and functionality of artificial photosynthesis-type Z-scheme photocatalytic systems. Electron transfer redox mediators with varying potentials were synthesized, and the difference in photocatalytic activity using these regents was investigated. In addition, an analytical method to directly evaluate the electron transfer process using electrochemical measurement was developed. Combining these findings established the evaluation method that serves as the basis for building design guidelines for highly functional photocatalytic systems.

Academic Significance and Societal Importance of the Research Achievements

無尽蔵な太陽光のエネルギーを用いた化学資源の創出は、持続可能なエネルギー利用と将来の炭素循環型社会の実現に向けた重要な課題の一つである。2種の半導体光触媒と電子伝達剤を組み合わせた2光子励起(Zスキーム)型の光触媒系はエネルギー蓄積(人工光合成)型の物質変換反応系として期待されている。本研究ではその機能向上を目的として、光触媒間の光励起電子の伝達過程に着目をした開発を行った。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (21 results)

All 2024 2023 2022 2021

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (16 results) (of which Int'l Joint Research: 8 results)

  • [Journal Article] Z-scheme water splitting utilizing CuLi<sub>1/3</sub>Ti<sub>2/3</sub>O<sub>2</sub> as a hydrogen-evolving photocatalyst with photo-response up to 600 nm2024

    • Author(s)
      Yoshino Shunya、Kurutach Tanya、Liu Qingshan、Yamanaka Toshiki、Nozawa Shunsuke、Kobayashi Makoto、Kumagai Hiromu、Kato Hideki
    • Journal Title

      Sustainable Energy &amp; Fuels

      Volume: 8 Issue: 6 Pages: 1260-1268

    • DOI

      10.1039/d3se01622f

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Hydrogen-evolving photocathodes consisting of Cu2SnxGe1-xS3 particles synthesized by polymerized complex method and sulphurization2023

    • Author(s)
      Kageshima Yosuke、Ooka Yusuke、Kumagai Hiromu、Takagi Fumiaki、Teshima Katsuya、Domen Kazunari、Nishikiori Hiromasa
    • Journal Title

      Sustainable Energy & Fuels

      Volume: 7 Issue: 22 Pages: 5342-5351

    • DOI

      10.1039/d3se00871a

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Photothermal Boosting of Photocatalytic Hydrogen Evolution Induced by Defects and Cocatalysts on TiO22023

    • Author(s)
      Kageshima Yosuke、Inuzuka Hiroto、Kumagai Hiromu、Ohtani Bunsho、Teshima Katsuya、Nishikiori Hiromasa
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 127 Issue: 37 Pages: 18327-18339

    • DOI

      10.1021/acs.jpcc.3c05049

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Photocatalytic Systems for CO<sub>2</sub> Reduction: Metal-Complex Photocatalysts and Their Hybrids with Photofunctional Solid Materials2022

    • Author(s)
      Kumagai Hiromu、Tamaki Yusuke、Ishitani Osamu
    • Journal Title

      Accounts of Chemical Research

      Volume: 55 Issue: 7 Pages: 978-990

    • DOI

      10.1021/acs.accounts.1c00705

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Influences of pulverization and annealing treatment on photocatalytic activity of BiVO4 for oxygen evolution2022

    • Author(s)
      Kazuya Okuno, Hiromu Kumagai, Junie Jhon M. Vequizo, Kosaku Kato, Makoto Kobayashi, Akira Yamakata, Masato Kakihana, Hideki Kato
    • Journal Title

      Sustainable Energy & Fuels

      Volume: 6 Issue: 7 Pages: 1698-1707

    • DOI

      10.1039/d2se00065b

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 錯体重合法で調製したAl,K添加CuO触媒によるCO2電解還元2023

    • Author(s)
      熊谷啓、嶺岸耕、江部広治、杉山正和
    • Organizer
      電気化学会2023電気化学秋季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 多孔質構造を持つCu電極を用いたCO2電解還元2023

    • Author(s)
      関良朝、嶺岸耕、熊谷啓、杉山正和
    • Organizer
      電気化学会2023電気化学秋季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Back contact modification on CdTe-based photocathode for efficient hydrogen evolution under simulated sunlight2023

    • Author(s)
      Lionel Veiga, Hiromu Kumagai, Masakazu Sugiyama, Tsutomu Minegishi
    • Organizer
      電気化学会2023電気化学秋季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Ball-Milled P-CuGaO2 Particles As a Semitransparent Scaffolding Material for Dye-Sensitized Molecular Photocathodes2023

    • Author(s)
      Hiromu Kumagai, Yasuomi Yamazaki, Osamu Ishitani
    • Organizer
      244th ECS Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Influences of cocatalysts deposited on perovskite-type oxynitrides as O2-evolving photocatalysts in Z-scheme water splitting2022

    • Author(s)
      Hideki Kato, Tsuyoshi Sekine, Naoto Morishita, Ryosuke Aoyagi, Kosaku Kato, Akira Yamakata, Hiromu Kumagai
    • Organizer
      The 9th Tokyo Conference on Advanced Catalytic Science and Technology (TOCAT9)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Improvement of Ir-doped SrTiO3 photocatalyst for H2 evolution by synthesis using polymerizable complex method2022

    • Author(s)
      Pei Hsuan Hung, Shunya Yoshino, Hiromu Kumagai, Hideki Kato
    • Organizer
      Post-symposium of TOCAT9 in Sendai
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Z-scheme water splitting utilizing CuLi1/3Ti2/3O2 as a H2-evolving photocatalysts2022

    • Author(s)
      Tanya Kurutach, Toshiki Yamanaka, Shunya Yoshino, Hiromu Kumagai, Hideki Kato
    • Organizer
      Post-symposium of TOCAT9 in Sendai
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 錯体重合法で合成したSrTiO3:Irの光触媒活性2022

    • Author(s)
      Hung Pei Hsuan, 吉野 隼矢, 熊谷 啓, 加藤 英樹
    • Organizer
      第130回触媒討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] Zスキーム型水分解のためのCuLi1/3Ti2/3O2光触媒に対する助触媒の検討2022

    • Author(s)
      クルタト タンヤー, 熊谷 啓, 吉野 隼矢, 加藤 英樹
    • Organizer
      第130回触媒討論会
    • Related Report
      2022 Research-status Report
  • [Presentation] BiVO4へのボールミル処理効果2022

    • Author(s)
      宮崎健志郎, 奥野和哉, 加藤康作, 山方啓, 熊谷啓, 加藤英樹
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] Zスキーム系の拡張に向けた酸窒化物光触媒への助触媒検討2021

    • Author(s)
      森下 直人, 小林 亮, 加藤 康作, 山方 啓, 熊谷 啓, 加藤 英樹
    • Organizer
      第40回光がかかわる触媒化学シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] CuLi1/3Ti2/3O2光触媒の Zスキーム型水分解への応用2021

    • Author(s)
      Kurutach Tanya, 山中 俊輝, 小林 亮, 熊谷 啓, 加藤 英樹
    • Organizer
      第128回触媒討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] Z-scheme photocatalytic water splitting using perovskite-type oxynitrides as oxygen-evolving photocatalysts2021

    • Author(s)
      Hideki Kato, Ryosuke Aoyagi, Naoto Morishita, Makoto Kobayashi, Hiromu Kumagai
    • Organizer
      International Conference on Materials and Systems for Sustainability 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Water splitting by Z-scheme system employing perovskite-type oxynitride photocatalysts2021

    • Author(s)
      Hideki Kato, Makoto Kobayashi, Hiromu Kumagai
    • Organizer
      3rd 5+2 International Joint Symposium
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Visible-light-driven Particulate Z-scheme Water Splitting Employing Perovskite Oxynitride as an O2-Evolving Photocatalyst2021

    • Author(s)
      Hiromu Kumagai, Ryosuke Aoyagi, Naoto Morishita, Makoto Kobayashi, Hideki Kato
    • Organizer
      The 5th Symposium for The Core Research Clusters for Materials Science and Spintronics, and the 4th Symposium on International Joint Graduate Program in Materials Science
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Particulate Z-scheme water splitting system with perovskite oxynitride as a visible-light-responsive O2-evolving photocatalyst2021

    • Author(s)
      Hiromu Kumagai, Ryosuke Aoyagi, Naoto Morishita, Makoto Kobayashi, Kosaku Kato, Akira Yamakata, Hideki Kato
    • Organizer
      Pacifichem 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2021-04-28   Modified: 2025-01-30  

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