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Study on structure-activity relationship of oxyhalide photocatalysts for achieving highly efficient water splitting

Research Project

Project/Area Number 21K14719
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 36020:Energy-related chemistry
Research InstitutionKyoto University

Principal Investigator

Hajime Suzuki  京都大学, 工学研究科, 助教 (10862873)

Project Period (FY) 2021-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2022: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2021: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords人口光合成 / 光触媒 / 水分解 / 可視光 / 酸ハロゲン化物 / 水素製造
Outline of Research at the Start

本研究では、近年高効率水分解用光触媒として期待されている「層状酸ハロゲン化物」の構造活性相関を追究し、設計指針に関する知見を深めると共に、新規酸ハロゲン化物光触媒の開発とその活性向上に取り組む。DFT計算とマイクロ波分光を組み合わせた積層パターンの精密設計・バルク性能最適化や、STEM観察・各種時間分解分光・電気化学測定による表面構造の観察・最適助触媒担持によって、新規酸ハロゲン化物光触媒の探索と活性の向上を論理的・効率的に推し進め、高効率水分解の実証を目指す。

Outline of Final Research Achievements

The following two topics were intensively studied: (1) development of new Sillen-type oxyhalide photocatalysts and band structure analysis of them and (2) synthesis of new multi-layered perovskite oxyiodide photocatalysts. In the topic (1), a Sillen-type SrBi3O4Cl3 photocatalyst was newly developed. The origin of visible light absorption of SrBi3O4Cl3 was revealed via a detail analysis of its band structure. In the topic (2), new multi-layered perovskite oxyiodide photocatalysts were synthesized and their physicochemical properties were evaluated. Introduction of iodide was found to change the band levels, light absorption, and photocatalytic activity.

Academic Significance and Societal Importance of the Research Achievements

クリーンな水素製造技術の一つとして半導体光触媒を用いた水分解が注目され、太陽光スペクトルの大部分を占める可視光を利用可能な新規水分解用光触媒の開発が盛んに行われている。本研究では、Sillen(-Aurivillius)型層状酸ハロゲン化物の各層(フルオライト層、ペロブスカイト層、ハロゲン層)が電子物性や光触媒活性に与える影響の解明に取り組み、新規酸ハロゲン化物光触媒の開発とその物性・活性評価を通じて、その一端を明らかにした。得られた知見を今後の材料開発にフィードバックすることで、光触媒として最適な構造を有する酸ハロゲン化物を設計できれば、本系の水分解効率の大幅な向上も期待できる。

Report

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

    (13 results)

All 2023 2022 2021

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (10 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] Improved Photocatalytic O2 Evolution on a Sille-Aurivillius Perovskite Oxychloride Bi6NbWO14Cl by Rh2O3 Additives and Surface Modifications2023

    • Author(s)
      Suzuki Hajime、Takashima Takanori、Tomita Osamu、Kanazawa Tomoki、Nozawa Shunsuke、Kato Kosaku、Yamakata Akira、Nakashima Kouichi、Saeki Akinori、Abe Ryu
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 127 Issue: 17 Pages: 7965-7973

    • DOI

      10.1021/acs.jpcc.3c00846

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Improved water oxidation activity of a Sillen SrBi<sub>3</sub>O<sub>4</sub>Cl<sub>3</sub> photocatalyst by flux method with an appropriate binary-component molten salt2022

    • Author(s)
      Ishii Yusuke、Suzuki Hajime、Ogawa Kanta、Tomita Osamu、Saeki Akinori、Abe Ryu
    • Journal Title

      Sustainable Energy & Fuels

      Volume: 6 Issue: 13 Pages: 3263-3270

    • DOI

      10.1039/d2se00635a

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] PbBi<sub>3</sub>O<sub>4</sub>X<sub>3</sub> (X = Cl, Br) with Single/Double Halogen Layers as a Photocatalyst for Visible-Light-Driven Water Splitting: Impact of a Halogen Layer on the Band Structure and Stability2021

    • Author(s)
      Suzuki Hajime、Higashi Masanobu、Tomita Osamu、Ishii Yusuke、Yamamoto Takafumi、Kato Daichi、Kotani Tetsu、Ozaki Daichi、Nozawa Shunsuke、Nakashima Kouichi、Fujita Koji、Saeki Akinori、Kageyama Hiroshi、Abe Ryu
    • Journal Title

      Chemistry of Materials

      Volume: 33 Issue: 24 Pages: 9580-9587

    • DOI

      10.1021/acs.chemmater.1c02876

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] Development of water-splitting photocatalysts using time-resolved microwave conductivity measurements2023

    • Author(s)
      Hajime Suzuki, Ryu Abe
    • Organizer
      Seventeenth International Workshop on Supramolecular Nanoscience of Chemically Programmed Pigments (SNCPP22)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 二種類のハロゲン層を有する層状酸ハロゲン化物光触媒が示す可視光吸収の起源追究2023

    • Author(s)
      鈴木肇, 石井佑典, 阿部竜
    • Organizer
      日本化学会 第103春季年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] PbBi3O4X3 (X=Cl, Br) with Single/Double Halogen Layers as a Photocatalyst for Visible-light-driven Water Splitting: Impact of Halogen Layer on Band Structure and Stability2022

    • Author(s)
      Hajime Suzuki, Masanobu Higashi, Osamu Tomita, Yusuke Ishii, Akinori Saeki, Hiroshi Kageyama, Ryu Abe
    • Organizer
      TOCAT9
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 二種類の異なるハロゲン層を有する可視光水分解用層状酸ハロゲン化物光触媒PbBi3O4X32022

    • Author(s)
      鈴木肇, 石井佑典, 冨田修, 佐伯昭紀, 阿部竜
    • Organizer
      第41回光がかかわる触媒化学シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] 2種類のハロゲン層を含む水分解用層状酸塩化物光触媒PbBi3O4X32022

    • Author(s)
      鈴木 肇,佐伯 昭紀,阿部 竜
    • Organizer
      第69回応用物理学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 2種類のハロゲン層を含む水分解用層状酸塩化物光触媒PbBi3O4Cl32022

    • Author(s)
      鈴木肇、佐伯昭紀、阿部竜
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 希土類含有Sillen型層状酸ハロゲン化物光触媒Bi2REO4Clの可視光水素生成活性2022

    • Author(s)
      古田 雄大、鈴木 肇、冨田 修、阿部 竜
    • Organizer
      日本化学会 第102春季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] 層状酸ハロゲン化物SrBi3O4Cl3光触媒の塩化物混合フラックスを用いる単相合成と可視光酸素生成活性2022

    • Author(s)
      石井 佑典、鈴木 肇、冨田 修、阿部 竜
    • Organizer
      日本化学会 第102春季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] 可視光応答型酸ハロゲン化物光触媒SrBi3O4Cl3の高活性化にむけた物性制御2022

    • Author(s)
      石井 佑典、鈴木 肇、尾﨑 大智、冨田 修、坂本 良太、阿部 竜
    • Organizer
      第128回触媒討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] ペロブスカイト三、四、五層系Sillen-Aurivillius型酸ハロゲン化物の合成と光触媒特性2022

    • Author(s)
      鈴木 肇,尾﨑 大智,小川 幹太,坂本 良太,冨田 修,陰山 洋,阿部 竜
    • Organizer
      第128回触媒討論会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2024-12-25  

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