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Controling of interfacial structures of ionic liquids for high efficiency CO2 reduction

Research Project

Project/Area Number 18K14188
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 32020:Functional solid state chemistry-related
Research InstitutionNagoya Institute of Technology

Principal Investigator

Motobayashi Kenta  名古屋工業大学, 工学(系)研究科(研究院), 准教授 (60609600)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywordsイオン液体 / CO2電解還元 / 界面分光 / 反応中間体 / 分光電気化学 / CO2還元 / 電極界面 / 二酸化炭素還元 / 表面増強赤外吸収分光法 / 電気化学 / 表面界面科学 / 表面増強赤外分光
Outline of Final Research Achievements

For the electrochemical CO2 reduction, usage of room temperature ionic liquids (RTILs) electrolytes resulted in relatively low overpotentials, although the mechanism was under discussion. To elucidate the reaction mechanism, we performed in-situ observation of the structure of RTIL/electrode at which CO2 reduction reaction taking place. Interface-selective vibrational spectroscopic measurements revealed the one-electron-reductant of CO2, reaction intermediate of this reaction, stabilized by cyclic amide cation on the electrode. This stabilization should be the origin of the lowered overpotentials. In addition, interface observation also revealed the effect of water that accelerates the reaction without decomposition.

Academic Significance and Societal Importance of the Research Achievements

温室効果ガスの削減は世界でも喫緊の課題の一つであり、日本でも2050年のカーボンニュートラル(実質排出量0)実現を目指すなど、削減目標を大幅に引き上げた。CO2還元反応は、CO2を消費して有機合成の原料となるCOを生成する、カーボンニュートラルに大きく貢献する反応である。本研究では、この反応に伴うエネルギー損失が、イオン液体電解液により軽減されるメカニズムを解明し、さらなる効率向上への道筋を示した。学術的にも、長年議論が続いていた反応メカニズムに答えを出した意味で、大きな意義があった。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (23 results)

All 2020 2019 2018 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (18 results) (of which Int'l Joint Research: 6 results,  Invited: 5 results) Remarks (2 results)

  • [Journal Article] Origin of a High Overpotential of Co Electrodeposition in a Room-Temperature Ionic Liquid2020

    • Author(s)
      Motobayashi Kenta、Shibamura Yuhei、Ikeda Katsuyoshi
    • Journal Title

      The Journal of Physical Chemistry Letters

      Volume: 11 Issue: 20 Pages: 8697-8702

    • DOI

      10.1021/acs.jpclett.0c02605

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Potential-induced interfacial restructuring of a pyrrolidinium-based ionic liquid on an Au electrode: Effect of polarization of constituent ions2019

    • Author(s)
      Kenta Motobayashi, Yuhei Shibamura, and Katsuyoshi Ikeda
    • Journal Title

      Electrochemistry Communications

      Volume: 100 Pages: 117-120

    • DOI

      10.1016/j.elecom.2019.02.003

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Recent advances in spectroscopic investigations on ionic liquid/electrode interfaces2018

    • Author(s)
      Kenta Motobayashi, and Masatoshi Osawa
    • Journal Title

      Current Opinion in Electrochemistry

      Volume: 8 Pages: 147-155

    • DOI

      10.1016/j.coelec.2018.05.003

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] リチウム塩濃厚電解液の構造観測2020

    • Author(s)
      長坂昌憲, 池田勝佳, 本林健太
    • Organizer
      2020年度ヤングエレクトロケミスト研究会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 電極界面におけるリチウム塩濃厚電解液の構造観測2020

    • Author(s)
      長坂昌憲, 池田勝佳, 本林健太
    • Organizer
      イオン液体ワークショップ2020
    • Related Report
      2020 Annual Research Report
  • [Presentation] イオン液体中におけるCO2電解還元の反応メカニズム2020

    • Author(s)
      前野義貴, 池田勝佳, 本林健太
    • Organizer
      イオン液体ワークショップ2020
    • Related Report
      2020 Annual Research Report
  • [Presentation] 電極界面におけるイオン液体の挙動 -Liイオン電池への応用を見据えて-2020

    • Author(s)
      本林健太
    • Organizer
      半導体エネルギー研究所講演会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] イオン液体の電極界面構造 -電位応答と電気化学反応への影響-2020

    • Author(s)
      本林健太
    • Organizer
      2020年度イオン液体研究会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 電極表面における溶媒和イオン液体の Li+脱離挙動:アニオン種の影響2019

    • Author(s)
      松本 晃輔、池田 勝佳、本林 健太
    • Organizer
      第10回イオン液体討論会
    • Related Report
      2019 Research-status Report
  • [Presentation] イミダゾリウム系イオン液体中における CO2 電解還元の反応メカニズム2019

    • Author(s)
      前野 義貴・池田 勝佳・本林 健太
    • Organizer
      第10回イオン液体討論会
    • Related Report
      2019 Research-status Report
  • [Presentation] イオン液体中におけるCO2電解還元反応のメカニズム解析2019

    • Author(s)
      前野 義貴、池田 勝佳、本林 健太
    • Organizer
      第50回 中部化学関係学協会支部連合秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Potential-induced Interfacial Restructuring of Ionic Liquids Triggering Electrochemical Reactions2019

    • Author(s)
      Kenta Motobayashi, Yuhei Shibamura, and Katsuyoshi Ikeda
    • Organizer
      Okinawa Colloids 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] In-situ Observation of Li+ Desolvation Behavior at Solvate Ionic Liquid/Electrode Interfaces2019

    • Author(s)
      Kosuke Matsumoto, Katsuyoshi Ikeda, and Kenta Motobayashi
    • Organizer
      Okinawa Colloids 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 電極界面近傍における溶媒和イオン液体からのLi+脱離挙動の観測2019

    • Author(s)
      松本 晃輔、池田 勝佳、本林 健太
    • Organizer
      2019年 電気化学秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] In-Situ Seiras Observation of Co Electrodeposition in an Ionic Liquid: Correlation between the Reaction and Interfacial Restructuring2019

    • Author(s)
      K. Motobayashi, Y. Shibamura, and K. Ikeda
    • Organizer
      236th ECS meeting
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] イオン液体の界面科学:界面構造と連動して進行する電気化学反応2019

    • Author(s)
      本林健太
    • Organizer
      第42回溶液化学プレシンポジウム
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] In-situ observation of Ionic Liquid/Electrode Interfaces under reaction conditions2019

    • Author(s)
      Kenta Motobayashi
    • Organizer
      RIKEN symposium "Forefront of molecular science at surfaces & interfaces"
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] In-situ Spectroscopic Observation of Electrochemical Reactions Triggered by Interfacial Restructuring in Ionic Liquids2019

    • Author(s)
      Kenta Motobayashi
    • Organizer
      日本化学会 第99春季年会
    • Related Report
      2018 Research-status Report
  • [Presentation] In-situ Spectroscopic Observation of Metal Electrodeposition Correlated with Interfacial Restructuring in an Ionic Liquid2018

    • Author(s)
      Kenta Motobayashi, Yuhei Shibamura, Katsuyoshi Ikeda
    • Organizer
      The 6th Asian-Pacific Congress on Ionic Liquid & Green Processes
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] In-situ Spectroscopic Observation of Co Electrodeposition in an Ionic Liquid Correlated with Interfacial Restructuring2018

    • Author(s)
      16.Kenta Motobayashi, Yuhei Shibamura, Katsuyoshi Ikeda
    • Organizer
      27th EUCHEM Conference on Molten Salts and Ionic Liquids
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] イオン液体/電極界面の科学:界面構造の電位応答と反応への影響2018

    • Author(s)
      本林健太
    • Organizer
      2018年第2回関西電気化学研究会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Remarks] 名古屋工業大学研究者データベース

    • URL

      http://researcher.nitech.ac.jp/html/100000427_ja.html

    • Related Report
      2020 Annual Research Report
  • [Remarks]

    • URL

      http://kmotobayashi.web.nitech.ac.jp/

    • Related Report
      2018 Research-status Report

URL: 

Published: 2018-04-23   Modified: 2022-12-28  

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