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

Characterization of Ag-modified photocatalysts and investigation of their mechansims for photocatalytic conversion of CO2 by H2O

Research Project

Project/Area Number 21H01716
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 27030:Catalyst and resource chemical process-related
Research InstitutionKyoto University

Principal Investigator

Teramura Kentaro  京都大学, 工学研究科, 教授 (80401131)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2023: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2022: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2021: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
KeywordsAgナノ粒子 / 光触媒 / CO2光還元 / 光電析法
Outline of Research at the Start

本研究の目的はH2Oを電子源とするCO2光還元に必要な光触媒への銀(Ag)ナノ粒子の修飾の意味を明らかにすることである.CO2の還元反応は電子だけでなくプロトン(H+)も必要であるが,活性サイト付近でのH+の還元を抑制することは難しい.これまでの検討により,Agナノ粒子の修飾を行うと,H2の生成が抑制され,CO2の還元が選択的に進行することが知られていた.しかし,単純にAgナノ粒子の修飾を行えばどのような光触媒を用いてもCO2が還元されるわけではない.本研究では反応機構を提案し,それに基づく特性評価を行い,提案している反応機構の妥当性を議論し,Agナノ粒子修飾について論理的な解釈を提案する.

Outline of Final Research Achievements

The formation rate of CO is normally lower than that of H2 for the photocatalytic conversion of CO2 by H2O as an electron donor because the redox potential of CO2 to CO is more negative than the H+/H2 redox potential. Thus, the reduction of CO2 competes with the production of H2 from H2O (overall water splitting) even in the presence of CO2. In this study, we focused on Ag nanoparticle co-catalysts, which are essential for CO2 photoreduction, and modified them on the surface of photocatalysts by various methods such as impregnation, photodeposition, and chemical reduction methods, and compared their activity for the photocatalytic conversion of CO2 by H2O as an electron donor. Ag nanoparticles were mainly dispersed on the reduction surface of the photocatalyst and functioned as a CO2 reduction site.

Academic Significance and Societal Importance of the Research Achievements

今後,人類が持続可能な社会を構築するためには,太陽光などの再生可能エネルギーを利用して,人類に必要な資源やエネルギーを作り出していく必要がある.本研究で対象にした「H2Oを電子源とするCO2光還元」は植物が行っている光合成を模倣しており,CO2とH2Oから化学物質を得られる人工光合成技術として注目を浴びている.この化学反応はH2Oの光還元による水素生成と競争するためにその制御が求められている.本研究では新規光触媒の開発とAgナノ粒子助触媒機能の解明によってCO生成速度を向上させることに成功した.

Report

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

    (45 results)

All 2024 2023 2022 2021

All Journal Article (12 results) (of which Peer Reviewed: 12 results,  Open Access: 1 results) Presentation (33 results) (of which Int'l Joint Research: 9 results,  Invited: 5 results)

  • [Journal Article] Photocatalytic conversion of CO2 using K2YTa5O15 photocatalyst in the presence of silver-iron dual cocatalyst2024

    • Author(s)
      Iguchi Shoji、Ikeda Yuki、Naniwa Shimpei、Tanaka Tsunehiro、Teramura Kentaro
    • Journal Title

      Bulletin of the Chemical Society of Japan

      Volume: 97 Issue: 4

    • DOI

      10.1093/bulcsj/uoae033

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Mg-doped SrTiO<sub>3</sub> photocatalyst with Ag?Co cocatalyst for enhanced selective conversion of CO<sub>2</sub> to CO using H<sub>2</sub>O as the electron donor2023

    • Author(s)
      Nakamoto Takechi、Iguchi Shoji、Naniwa Shimpei、Tanaka Tsunehiro、Teramura Kentaro
    • Journal Title

      Catalysis Science &amp; Technology

      Volume: 13 Issue: 15 Pages: 4534-4541

    • DOI

      10.1039/d3cy00576c

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Kinetic Study of Heterogeneous Photocatalytic CO<sub>2</sub> Reduction: Development of a General Formula for Relations between Activity and Reaction Conditions2023

    • Author(s)
      Morishita Masashige、Asakura Hiroyuki、Hosokawa Saburo、Tanaka Tsunehiro、Teramura Kentaro
    • Journal Title

      ACS Catalysis

      Volume: 13 Issue: 10 Pages: 6966-6973

    • DOI

      10.1021/acscatal.2c05823

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] High selectivity toward CO evolution for the photocatalytic conversion of CO2 by H2O as an electron donor over Ag-loaded β-Ga2O32023

    • Author(s)
      Xu, Xuanwen; Tanaka, Tsunehiro*; Teramura, Kentaro*
    • Journal Title

      Applied Catalysis, B: Environmental

      Volume: 321 Pages: 122027-122027

    • DOI

      10.1016/j.apcatb.2022.122027

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Tuning Ag-modified NaTaO3 to achieve high CO selectivity for the photocatalytic conversion of CO2 using H2O as the electron donor2023

    • Author(s)
      Xu, Xuanwen; Asakura, Hiroyuki; Hosokawa, Saburo; Tanaka, Tsunehiro*; Teramura, Kentaro*
    • Journal Title

      Applied Catalysis, B: Environmental

      Volume: 320 Pages: 121885-121885

    • DOI

      10.1016/j.apcatb.2022.121885

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of the in situ addition of chromate ions on H2 evolution during the photocatalytic conversion of CO2 using H2O as the electron donor2023

    • Author(s)
      Xu, Xuanwen; Asakura, Hiroyuki; Hosokawa, Saburo; Tanaka, Tsunehiro*; Teramura, Kentaro*
    • Journal Title

      Catalysis Today

      Volume: 410 Pages: 273-281

    • DOI

      10.1016/j.cattod.2022.05.045

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Exploring Effective Non-metal Inorganic Cocatalysts for the Photocatalytic Conversion of CO2 Using H2O as an Electron Donor2022

    • Author(s)
      Xu, Xuanwen; Asakura, Hiroyuki; Hosokawa, Saburo; Tanaka, Tsunehiro*; Teramura, Kentaro*
    • Journal Title

      ACS Applied Energy Materials

      Volume: 5 Issue: 9 Pages: 11379-11385

    • DOI

      10.1021/acsaem.2c01865

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of Zinc Hydroxide as an Abundant and Universal Cocatalyst for the Selective Photocatalytic Conversion of CO2 by H2O2021

    • Author(s)
      Xu, Xuanwen; Teramura, Kentaro*; Asakura, Hiroyuki; Hosokawa, Saburo; Tanaka, Tsunehiro*
    • Journal Title

      ChemCatChem

      Volume: 13 Issue: 20 Pages: 4313-4317

    • DOI

      10.1002/cctc.202100633

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Shift of active sites via in-situ photodeposition of chromate achieving highly selective photocatalytic conversion of CO2 by H2O over ZnTa2O62021

    • Author(s)
      Xu, Xuanwen; Teramura, Kentaro*; Asakura, Hiroyuki; Hosokawa, Saburo; Tanaka, Tsunehiro*
    • Journal Title

      Applied Catalysis, B: Environmental

      Volume: 298 Pages: 120508-120508

    • DOI

      10.1016/j.apcatb.2021.120508

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Highly Selective Photocatalytic Conversion of Carbon Dioxide by Water over Al-SrTiO3 Photocatalyst Modified with Silver-Metal Dual Cocatalysts2021

    • Author(s)
      Wang, Shuying; Teramura, Kentaro*; Hisatomi, Takashi; Domen, Kazunari; Asakura, Hiroyuki; Hosokawa, Saburo; Tanaka, Tsunehiro*
    • Journal Title

      ACS Sustainable Chemistry & Engineering

      Volume: 9 Issue: 13 Pages: 9327-9335

    • DOI

      10.1021/acs.inorgchem.1c00151

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dual Ag/Co cocatalyst synergism for the highly effective photocatalytic conversion of CO2 by H2O over Al-SrTiO32021

    • Author(s)
      Wang, Shuying; Teramura, Kentaro*; Hisatomi, Takashi; Domen, Kazunari; Asakura, Hiroyuki; Hosokawa, Saburo; Tanaka, Tsunehiro*
    • Journal Title

      Chemical Science

      Volume: 12 Issue: 13 Pages: 4940-4948

    • DOI

      10.1039/d1sc00206f

    • NAID

      120006975991

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of Zn in Ag-Loaded Zn-Modified ZnTa2O6 for Photocatalytic Conversion of CO2 by H2O2021

    • Author(s)
      Wang, Shuying; Teramura, Kentaro*; Asakura, Hiroyuki; Hosokawa, Saburo; Tanaka, Tsunehiro*
    • Journal Title

      Journal of Physical Chemistry C

      Volume: 125 Issue: 2 Pages: 1304-1312

    • DOI

      10.1021/acs.jpcc.0c08464

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] CO2光還元におけるSrTiO3光触媒への各種金属イオンのドープ効果2024

    • Author(s)
      中本嵩市,井口翔之,浪花晋平,田中庸裕,寺村謙太郎
    • Organizer
      日本化学会第104春季年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] ZnTa2O6光触媒のZn/Ta比がCO2光還元活性に及ぼす効果2024

    • Author(s)
      川田稀士, 西本大夢,井口翔之,浪花晋平,田中庸裕,寺村謙太郎
    • Organizer
      日本化学会第104春季年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 金属ドープSrTiO3光触媒を用いた正孔捕捉剤存在下でのCO2光還元2024

    • Author(s)
      小坂井明,中本嵩市,井口翔之,浪花晋平,田中庸裕,寺村謙太郎
    • Organizer
      電気化学会第91回大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 膜-光電極接合体の作製と光電気化学特性の評価2024

    • Author(s)
      大塚恭平,中本嵩市,井口翔之,浪花晋平,田中庸裕,寺村謙太郎
    • Organizer
      電気化学会第91回大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] CO2光還元におけるSrTiO3光触媒への各種金属イオンのドープ効果2024

    • Author(s)
      中本嵩市,井口翔之,浪花晋平,田中庸裕,寺村謙太郎
    • Organizer
      第133回触媒討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 金属ドープSrTiO3を用いたCO2光還元における正孔捕捉剤としてのアルコールの添加効果2023

    • Author(s)
      中本嵩市,小坂井明,井口翔之,浪花晋平,田中庸裕,寺村謙太郎
    • Organizer
      第42回固体・表面光化学討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Mg-doped SrTiO3 Photocatalyst with Ag-Co Cocatalyst for Enhanced Selective Conversion of CO2 to CO Using H2O as the Electron Donor2023

    • Author(s)
      Takechi Nakamoto, Shoji Iguchi, Shimpei Naniwa, Tsunehiro Tanaka, Kentaro Teramura
    • Organizer
      OKCAT2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] MgドープSrTiO3を用いたCO2光還元における正孔捕捉剤としてのアルコールの添加効果2023

    • Author(s)
      中本嵩市, 井口翔之, 浪花晋平, 田中庸裕, 寺村謙太郎
    • Organizer
      第17回触媒道場
    • Related Report
      2023 Annual Research Report
  • [Presentation] 超音波還元法によりAg助触媒を担持したZnTa2O6光触媒の水を電子源としたCO2光還元活性2023

    • Author(s)
      川田稀士,西本大夢,井口翔之,浪花晋平,田中庸裕,寺村謙太郎
    • Organizer
      第17回触媒道場
    • Related Report
      2023 Annual Research Report
  • [Presentation] AlドープSrTiO3を用いたCO2光還元における正孔捕捉剤としてのアルコールの添加効果2023

    • Author(s)
      小坂井 明,中本 嵩市,Wang Shuying,井口 翔之,浪花 晋平,田中 庸裕,寺村 謙太郎
    • Organizer
      第17回触媒道場
    • Related Report
      2023 Annual Research Report
  • [Presentation] MgドープSrTiO3を用いたCO2光還元における正孔捕捉剤の添加効果2023

    • Author(s)
      岡晋太朗, 浪花晋平, 井口翔之, 田中庸裕, 寺村謙太郎
    • Organizer
      第132回触媒討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 超音波還元法により Ag助触媒を担持した ZnTa2O6光触媒の CO2光還元活性2023

    • Author(s)
      川田稀士,西本大夢,井口翔之,浪花晋平,田中庸裕,寺村謙太郎
    • Organizer
      第132回触媒討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] AlドープSrTiO3を用いたCO2光還元における正孔捕捉剤の添加効果2023

    • Author(s)
      小坂井 明,中本 嵩市,Wang Shuying,井口 翔之,浪花 晋平,田中 庸裕,寺村 謙太郎
    • Organizer
      第132回触媒討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 水を電子源とするCO2光還元に活性を示すSrTiO3光触媒へのMgドープの効果2023

    • Author(s)
      中本嵩市, 井口翔之, 浪花晋平, 田中庸裕, 寺村謙太郎
    • Organizer
      第43回夏の研修会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 中本嵩市, 井口翔之, 浪花晋平, 田中庸裕, 寺村謙太郎2023

    • Author(s)
      水を電子源とするCO2光還元に活性を示すSrTiO3光触媒へのMgドープの効果
    • Organizer
      第19回触媒化学ワークショップ
    • Related Report
      2023 Annual Research Report
  • [Presentation] MgドープSrTiO3を用いたCO2光還元における正孔捕捉剤の添加効果2023

    • Author(s)
      中本嵩市・小坂井明・井口翔之・浪花晋平・田中庸裕・寺村謙太郎
    • Organizer
      第42回光がかかわる触媒化学シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] Development of photocatalysts for CO2 conversion with H2O2023

    • Author(s)
      Shoji Iguchi, Shimpei Naniwa, Tsunehiro Tanaka, and Kentaro Teramura
    • Organizer
      2023 Taiwan International Conference on Catalysis (TICC-2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] AlドープSrTiO3を用いたCO2光還元における犠牲剤添加効果2023

    • Author(s)
      小坂井 明,中本 嵩市,Wang Shuying,井口 翔之,浪花 晋平,田中 庸裕,寺村 謙太郎
    • Organizer
      触媒学会西日本支部第14回触媒科学研究発表会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Al-Doped SrTiO3 Photocatalyst for Selective CO2 Reduction with Water as a Reductant2023

    • Author(s)
      Shoji Iguchi, Shuying Wang, Shimpei Naniwa, Hiroyuki Asakura, Saburo Hosokawa, Tsunehiro Tanaka, Kentaro Teramura
    • Organizer
      243rd ECS Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Photocatalytic Conversion of CO2 by H2O as an Electron Donor over Mg-doped SrTiO32023

    • Author(s)
      Takechi Nakamoto, Shoji Iguchi, Shimpei Naniwa, Tsunehiro Tanaka, Kentaro Teramura
    • Organizer
      243rd ECS Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 水を電子源とするCO2光還元におけるSrTiO3光触媒へのMgドープの効果2023

    • Author(s)
      中本嵩市,井口翔之,浪花晋平,田中庸裕,寺村謙太郎
    • Organizer
      第131回触媒討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Effect of Fe addition to Ag / K2YTa5O15 photocatalyst on the conversion of CO2 using H2O as an electron donor2022

    • Author(s)
      池田有輝,井口翔之,浪花晋平,田中庸裕,寺村謙太郎
    • Organizer
      OKCAT2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] CO2光還元に活性を示すMgドープSrTiO3の調製法の検討2022

    • Author(s)
      中本嵩市,浪花晋平,田中庸裕,寺村謙太郎
    • Organizer
      第130回触媒討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] H2Oを電子源とするCO2光還元におけるAg-Fe助触媒の添加効果2022

    • Author(s)
      池田有輝,Shuying Wang, 浪花晋平,田中庸裕,寺村謙太郎
    • Organizer
      第130回触媒討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Development of Zinc Hydroxide as an Abundant and Universal Cocatalyst for the Selective Photocatalytic Conversion of CO2 by H2O2022

    • Author(s)
      Xuanwen XU, Kentaro TERAMURA, Hiroyuki ASAKURA, Saburo HOSOKAWA, Tsunehiro TANAKA
    • Organizer
      The 9 th Tokyo Conference on Advanced Catalytic Science and Technology (TOCAT9)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] MgドープSrTiO3を用いたH2Oを電子源とするCO2光還元2022

    • Author(s)
      中本嵩市,浪花晋平,田中庸裕,寺村謙太郎
    • 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] Catalyst Design and Development for Highly Selective Photocatalytic Conversion of CO2 by H2O as an Electron Donor2021

    • Author(s)
      Kentaro Teramura, Shuying Wang, Soichi Kikkawa, Rui Pang, Zeai Huang, Shoji Iguchi, Zheng Wang, Hiroyuki Asakura, Saburo Hosokawa, Tsunehiro Tanaka
    • Organizer
      239th ECS Meeting
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Artificial Photosynthesis by Heterogenous Photocatalysts -Photocatalytic Reduction of CO2 by H2O as an Electron Donor2021

    • Author(s)
      Kentaro Teramura, Shuying Wang, Soichi Kikkawa, Rui Pang, Zeai Huang, Shoji Iguchi, Zheng Wang, Hiroyuki Asakura, Saburo Hosokawa, Tsunehiro Tanaka
    • Organizer
      18th International Conference on Carbon Dioxide Utilization (ICCDU2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Highly concentrated CO evolution for phtoocatalytic conversion of CO2 by H2O as electron donor2021

    • Author(s)
      Kentaro Teramura, Shuying Wang, Soichi Kikkawa, Rui Pang, Zeai Huang, Shoji Iguchi, Zheng Wang, Hiroyuki Asakura, Saburo Hosokawa, Tsunehiro Tanaka
    • Organizer
      1st Japan-China Symposium on Catalysis (1stJCSC)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Development of Zinc Hydroxide as an Abundant and Universal Cocatalyst for the Selective Photocatalytic Conversion of CO2 by H2O2021

    • Author(s)
      Xuanwen XU, Kentaro TERAMURA, Hiroyuki ASAKURA, Saburo HOSOKAWA, Tsunehiro TANAKA
    • Organizer
      第128回触媒討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Ag-Fe助触媒を修飾したAlドープSrTiO3によるH2Oを電子源とするCO2光還元2021

    • Author(s)
      池田有輝,Shuying WANG,寺村謙太郎,朝倉博行,細川三郎,田中庸裕
    • Organizer
      第128回触媒討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Ag-Fe助触媒を修飾したAlドープSrTiO3によるH2Oを電子源とするCO2光還元2021

    • Author(s)
      池田有輝, Shuying WANG,寺村謙太郎,朝倉博行,細川三郎,田中庸裕
    • Organizer
      第129回触媒討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] MgドープSrTiO3を用いたH2Oを電子源とするCO2光還元2021

    • Author(s)
      中本嵩市,寺村謙太郎,朝倉博行,田中庸裕
    • Organizer
      第129回触媒討論会
    • Related Report
      2021 Annual Research Report

URL: 

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

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi