Selective and high-rate CO2 electroreduction by metal-doped covalent triazine frameworks

2022 Fiscal Year Final Research Report

• Project/Area Number: 20H02568
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 28030:Nanomaterials-related
• Research Institution: Osaka University
• Principal Investigator: Kamiya Kazuhide 大阪大学, 大学院基礎工学研究科, 准教授 (50716016)
• Co-Investigator(Kenkyū-buntansha): 岩瀬 和至 東北大学, 多元物質科学研究所, 助教 (90846437)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: CO2電解 / 有機構造体 / 高速電解 / 第一原理計算

Outline of Final Research Achievements

The electrochemical CO2 reduction reaction has attracted much attention. It is essential to achieve both high reaction rates and high selectivity simultaneously. Recently, there have been attempts to enhance the reaction rate through direct electrochemical reduction of gaseous CO2 using gas diffusion electrodes (GDEs). However, only a few materials, such as metallic copper, can function as efficient electrocatalysts at high rotational frequencies on GDEs. Developing new catalyst materials that can achieve both high selectivity and fast reaction rates is therefore an urgent issue. In this study, we discovered that an electrocatalyst consisting of a single metal center supported on covalent triazine frameworks could serve as a platform for selective electrocatalysts for gaseous CO2 reduction reactions.

Free Research Field

電気化学、材料化学

Academic Significance and Societal Importance of the Research Achievements

CO2電解の高速化、高選択化は本技術の社会実装に向けた必須要件である。金属活性中心のみを入れ替えるだけで生成物を変化させることができる本材料は、電極触媒としての基盤材料である。また、構造特定が容易であることから、原理解明に向けたモデル化合物しても好適であり、今後広く研究対象となることが期待される。