• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Optimization of photocatalytic materials with a combination of analytical data and machine learning

Research Project

Project/Area Number 22K05158
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 34020:Analytical chemistry-related
Research InstitutionChuo University

Principal Investigator

KATAYAMA KENJI  中央大学, 理工学部, 教授 (00313007)

Co-Investigator(Kenkyū-buntansha) 潘 振華  兵庫県立大学, 工学研究科, 准教授 (90870551)
Project Period (FY) 2022-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2024: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords光電気化学水分解 / 機械学習 / 分析化学データ / ヘマタイト / バナジン酸ビスマス / 分析科学データ / 太陽光水分解
Outline of Research at the Start

太陽光水分解は次世代エネルギーの産生法として期待されている。有望な新規物質が発見されると多くのグループで追試がおこわなれるが、同等な性能を再現することは容易ではない。たとえ、化学組成は同じでも、界面構造・不純物・厚みなどミクロからマクロにかけての状態が同じにならないと同様の性能を発揮できないからである。本研究では、デバイス性能に影響を及ぼす実験条件を、機械学習を用いて最適化し、高性能な材料・デバイスを提供する。デバイス材料の分析化学データを収集し、データの特徴量を介在変数としてデバイス性能値と実験条件を機械学習的方法により接続する。太陽光水分解材料に適用し、本法の有用性を示す。

Outline of Final Research Achievements

In this study, we developed and demonstrated a local machine learning approach using a small number of data to identify and improve the performance-determining factors of oxide semiconductor electrodes for photoelectrochemical (PEC) water splitting. Spectral data from XRD, Raman, UV/Vis, and PEIS were converted into descriptors to accurately predict PEC performance. Classification learning enabled distinction between high- and low-performing samples and extraction of dominant factors for performance enhancement. By combining multivariate analysis and clustering, we proposed an integrated strategy linking theory and experiment. Furthermore, we introduced subtraction descriptors to quantify modification effects and applied SHAP analysis to achieve performance improvement. CNN-based prediction using only SEM images was also explored, highlighting the potential of image-based evaluation methods.

Academic Significance and Societal Importance of the Research Achievements

光電気化学水分解における半導体電極の性能評価と最適化に、少数データに基づくローカル機械学習手法を初めて体系的に導入した点において学術的に大きな意義を持つ。従来の物性記述子に依存しない分光データや画像情報から直接性能を予測し、さらにはその要因を可視化・定量化する手法(SHAP解析)を確立したことで、材料科学におけるブラックボックス問題を解消する手段を提示した。また、分光法に限らず、SEM画像のみによる性能予測にも成功しており、視覚的データに基づく材料設計という新たな学術的展開を拓いた。グリーン水素製造に貢献する光水分解技術の実用化に向けて、データ駆動型で材料改良を進める重要な知見となる。

Report

(4 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • Research Products

    (32 results)

All 2025 2024 2023 2022 Other

All Int'l Joint Research (1 results) Journal Article (14 results) (of which Peer Reviewed: 7 results) Presentation (17 results) (of which Int'l Joint Research: 9 results,  Invited: 11 results)

  • [Int'l Joint Research] Chungbuk National University(韓国)

    • Related Report
      2024 Annual Research Report
  • [Journal Article] Direct Visualization of Interfacial Charge Transfer in CsPbBr<sub>3</sub> Perovskite Solar Cells Using Pattern-Illumination Time-Resolved Phase Microscopy2025

    • Author(s)
      Ito Tatsuki、Katayama Kenji
    • Journal Title

      ACS Applied Materials and Interfaces

      Volume: 17 Issue: 18 Pages: 26740-26750

    • DOI

      10.1021/acsami.5c02923

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Insight into Charge Transport Behaviors in Hematite Photoanodes via Potential-Dependent Impedance Spectroscopy and Machine Learning2025

    • Author(s)
      Shoda Hiroomi、Pan Zhenhua、Sohn Woon Yong、Katayama Kenji
    • Journal Title

      ACS Applied Materials and Interfaces

      Volume: 17 Issue: 5 Pages: 7830-7837

    • DOI

      10.1021/acsami.4c19865

    • Related Report
      2024 Annual Research Report
  • [Journal Article] Tailoring Hematite Photoanodes for Improved PEC Performance: The Role of Alcohol Species Revealed by SHAP Analysis2024

    • Author(s)
      Idei Takumi、Nagai Yuya、Pan Zhenhua、Katayama Kenji
    • Journal Title

      ACS Omega

      Volume: 9 Issue: 44 Pages: 44837-44845

    • DOI

      10.1021/acsomega.4c08633

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Illumination-Induced Solute Uptake in Liquid Crystal Droplets: The Role of 5CB Excimers2024

    • Author(s)
      Kido Haruka、Kusaki Hinako、Sakai Yota、Ikeda Tomiki、Katayama Kenji
    • Journal Title

      Langmuir

      Volume: 40 Issue: 41 Pages: 21824-21831

    • DOI

      10.1021/acs.langmuir.4c03046

    • Related Report
      2024 Annual Research Report
  • [Journal Article] A robust methodology for PEC performance analysis of photoanodes using machine learning and analytical data2024

    • Author(s)
      Tajima Moeko、Nagai Yuya、Chen Siyan、Pan Zhenhua、Katayama Kenji
    • Journal Title

      The Analyst

      Volume: 149 Issue: 16 Pages: 4193-4207

    • DOI

      10.1039/d4an00439f

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Pattern-illumination time-resolved phase microscopy and its applications for photocatalytic and photovoltaic materials2024

    • Author(s)
      Katayama Kenji
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 26 Issue: 13 Pages: 9783-9815

    • DOI

      10.1039/d3cp06211b

    • Related Report
      2023 Research-status Report
  • [Journal Article] Roles of Surface States in Cocatalyst-Loaded Hematite Photoanodes for Water Oxidation2023

    • Author(s)
      Pan Zhenhua、Chen Siyan、Katayama Kenji
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 127 Issue: 7 Pages: 3904-3909

    • DOI

      10.1021/acs.jpcc.3c00592

    • Related Report
      2023 Research-status Report 2022 Research-status Report
  • [Journal Article] Identification of dominant factors contributing to photocurrent density of BiVO4 photoanodes using Machine learning2023

    • Author(s)
      Kobayashi Kazuki、Nagai Yuya、Pan Zhenhua、Katayama Kenji
    • Journal Title

      Journal of Photochemistry and Photobiology A: Chemistry

      Volume: 440 Pages: 114651-114651

    • DOI

      10.1016/j.jphotochem.2023.114651

    • Related Report
      2023 Research-status Report 2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Identification of the Contributing Factors to the Photoelectric Conversion Efficiency for Hematite Photoanodes by Using Machine Learning2023

    • Author(s)
      Idei Takumi、Nagai Yuya、Pan Zhenhua、Katayama Kenji
    • Journal Title

      ACS Applied Materials &amp; Interfaces

      Volume: 15 Issue: 48 Pages: 55644-55651

    • DOI

      10.1021/acsami.3c11295

    • Related Report
      2023 Research-status Report
    • Peer Reviewed
  • [Journal Article] Convolutional neural network prediction of the photocurrent?voltage curve directly from scanning electron microscopy images2023

    • Author(s)
      Hayashi Yuta、Nagai Yuya、Pan Zhenhua、Katayama Kenji
    • Journal Title

      Journal of Materials Chemistry A

      Volume: 11 Issue: 41 Pages: 22522-22532

    • DOI

      10.1039/d3ta05282f

    • Related Report
      2023 Research-status Report
    • Peer Reviewed
  • [Journal Article] Elucidating the Role of Surface Energetics on Charge Separation during Photoelectrochemical Water Splitting2022

    • Author(s)
      Pan Zhenhua、Nandal Vikas、Pihosh Yuriy、Higashi Tomohiro、Liu Tian、R?hr Jason A.、Seki Kazuhiko、Chu Chiheng、Domen Kazunari、Katayama Kenji
    • Journal Title

      ACS Catalysis

      Volume: 12 Issue: 23 Pages: 14727-14734

    • DOI

      10.1021/acscatal.2c04225

    • Related Report
      2022 Research-status Report
  • [Journal Article] Effect of CoO<sub><i>x</i></sub> and Rh Cocatalysts on Local Charge Carrier Dynamics of BiVO<sub>4</sub> Particles by Pattern-Illumination Time-Resolved Phase Microscopy2022

    • Author(s)
      Chugenji Tatsuya、Pan Zhenhua、Katayama Kenji
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 126 Issue: 45 Pages: 19319-19326

    • DOI

      10.1021/acs.jpcc.2c06834

    • Related Report
      2022 Research-status Report
  • [Journal Article] Local charge carrier dynamics of a particulate Ga-doped La<sub>5</sub>Ti<sub>2</sub>Cu<sub>0.9</sub>Ag<sub>0.1</sub>O<sub>7</sub>S<sub>5</sub> photocatalyst and the impact of Rh cocatalysts2022

    • Author(s)
      Chugenji Tatsuya、Pan Zhenhua、Nandal Vikas、Seki Kazuhiko、Domen Kazunari、Katayama Kenji
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 24 Issue: 29 Pages: 17485-17495

    • DOI

      10.1039/d2cp02808e

    • Related Report
      2022 Research-status Report
  • [Journal Article] Prediction of the photoelectrochemical performance of hematite electrodes using analytical data2022

    • Author(s)
      Nagai Yuya、Katayama Kenji
    • Journal Title

      The Analyst

      Volume: 147 Issue: 7 Pages: 1313-1320

    • DOI

      10.1039/d2an00227b

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] Pattern-illumination time-resolved phase microscopy and mehanistic study on photocatalytic materials2025

    • Author(s)
      Kenji Katayama
    • Organizer
      5th NCU/CHUO Chemistry Workshop
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Microfluidic formation of topological defects in liquid crystals and their application2024

    • Author(s)
      Kenji Katayama
    • Organizer
      SPIE OPTO/Photonics West
    • Related Report
      2024 Annual Research Report 2023 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 「研究段階から使える機械学習と分析科学データを組み合わせた材料最適化」―光電気化学水分解材料を例に―2024

    • Author(s)
      片山建二
    • Organizer
      電気学会
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] 「研究段階から使える機械学習と分析科学データを組み合わせた材料最適化」―光電気化学水分解材料を例に―2024

    • Author(s)
      片山建二
    • Organizer
      光機能材料研究会25周年記念
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] Convolutional Neural Network Prediction of the photocurrent-voltage curve directly from scanning electron microscopic image for bismuth vanadate2024

    • Author(s)
      Kenji Katayama, Yuta Hayashi, Yuya Nagai, Zhenhua Pan
    • Organizer
      日本化学会第104春季年会
    • Related Report
      2023 Research-status Report
  • [Presentation] Local charge carrier dynamics of photocatalytic materials using the pattern-illumination time-resolved phase microscopy2023

    • Author(s)
      Kenji Katayama
    • Organizer
      25th SPVM National Physics Conference
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 光触媒水分解材料開発のためのソフト・ ハードアプローチ~時間分解顕微鏡から機械学習まで~2023

    • Author(s)
      片山建二
    • Organizer
      九州大学セミナー
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] Local charge carrier dynamics of photocatalytic materials using the pattern-illumination time-resolved phase microscopy2023

    • Author(s)
      Kenji Katayama
    • Organizer
      Laser Physics 2023
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Controlled formation of topological defects at liquid/liquid crystal interfaces and their application2023

    • Author(s)
      Kenji Katayama
    • Organizer
      SPIE Optics + Photonics 2023, Liquid crystals XXVII
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Identification of Dominant Factors Contributing to Photocurrent Density of BiVO4 Photoanodes Using Machine Learning2023

    • Author(s)
      Kenji Katayama, Kazuki Kobayashi, Yuya Nagai, Zhenhua Pan
    • Organizer
      International Conference of Photochemistry 2023
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research
  • [Presentation] 今から研究現場で使える機械学習を利用した材料最適化―光触媒材料を例に-2023

    • Author(s)
      片山建二
    • Organizer
      光機能材料研究会 第93回ウェブ講演会
    • Related Report
      2023 Research-status Report 2022 Research-status Report
    • Invited
  • [Presentation] 機械学習と分析科学データを組み合わせた水分解光触媒材料の最適化(2)2023

    • Author(s)
      片山建二、小林和祈、潘振華
    • Organizer
      第83回分析化学討論会
    • Related Report
      2023 Research-status Report
  • [Presentation] Local charge-carrier dynamics of a particulate Ga-doped La5Ti2Cu0.9Ag0.1O7S5 photocatalyst and the impact of Rh cocatalyst2023

    • Author(s)
      Kenji Katayama
    • Organizer
      日本化学会第103春季年会
    • Related Report
      2022 Research-status Report
  • [Presentation] Microscopic Interfacial Charge Transfer at Perovskite / Hole Transport Layer Interfaces Clarified by the Pattern-illumination Time-resolved Phase Microscopy Microscopy2022

    • Author(s)
      Kenji Katayama
    • Organizer
      International Photovoltaic Science and Engineering Conference
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Microfluidic formation of topological defects in liquid crystals and their application2022

    • Author(s)
      Kenji Katayama
    • Organizer
      Optics of Liquid Crystals Satellite Workshop
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Microscopic interfacial charge transfer at perovskite / hole transport layer interfaces clarified by the pattern-illumination time-resolved phase microscopy2022

    • Author(s)
      Kenji Katayama, Tatsuya Chugenji, Zhenhua Pan
    • Organizer
      ACS Fall 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] パターン光光照射時間分解位相差顕微鏡を用いた光触媒水分解材料の活性度マッピング2022

    • Author(s)
      片山建二
    • Organizer
      第19回 関東光科学若手研究会
    • Related Report
      2022 Research-status Report
    • Invited

URL: 

Published: 2022-04-19   Modified: 2026-01-16  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi