Electrochemistry at the Non-aqueous Liquid-Liquid Interface between Ionic Liquids and Oils: Scientific Principle Construction and Nanomaterial Fabrication

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H02046
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 36020:Energy-related chemistry
• Research Institution: Kyoto University
• Principal Investigator: Nishi Naoya 京都大学, 工学研究科, 准教授 (10372567)
• Co-Investigator(Kenkyū-buntansha): 作花 哲夫 京都大学, 工学研究科, 教授 (10196206)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: イオン液体 / 液液界面 / 金属ナノ構造 / 卑金属 / 界面電荷移動

Outline of Final Research Achievements

Nanostructures of base metals have been fabricated at the water-free liquid-liquid interface between an ionic liquid consisting only of ions and an organic solvent (oil) as a new electrochemical reaction field. It has been demonstrated that not only Cu, which can be deposited at the conventional liquid-liquid interface, but also Zn and Al, which cannot be deposited, can be reductively deposited at the water-free liquid-liquid interface in the present study. The reaction mechanism of metallic Al deposition was clarified by identifying product species in the liquids and and in the gas.

Free Research Field

界面物理化学

Academic Significance and Societal Importance of the Research Achievements

液液界面を利用する金属還元析出は反応速度や反応ジオメトリを制御できる方法として魅力的であるにもかかわらず、その利用は、従来型の液液界面では、水の存在により、貴金属に限られていた。本研究では、イオン液体と油との間の非水液液界面を新奇な電気化学反応場とすることにより、液液界面金属析出法の対象を、貴金属のみならず卑金属にまで拡張することに成功した。