甲酸是CO2电催化还原转化中一个重要产物。铟对CO2电催化转化制甲酸反应选择性高，但能量转化效率低。我们前期研究结果表明以石墨烯为载体的金属纳米催化剂的催化活性明显提高，据此提出利用石墨烯担载铟基纳米催化剂来提高CO2电催化转化制甲酸的催化活性。项目拟首先探究铟模型催化剂上的催化活性单元（包括活性铟物种和活性助剂），然后基于气氛可控的液相还原法获得以石墨烯为载体、具有高密度催化活性单元的铟基纳米催化剂，采用ICP-AES、XRD、TEM、XPS和电解实验等对催化剂的微观组成、结构和电催化活性进行表征，理解CO2电催化转化制甲酸用铟基催化剂的结构与催化性能间的构效关系与调变机制，为研发高性能的CO2电催化转化制甲酸用In基催化剂提供理论依据与实验基础。

Formic acid is an important product of electro-catalytic conversion of CO2. Indium catalyst shows a high selectivity for electro-catalytic conversion of CO2 to formic acid, however, the low energy conversion efficiency limits its future application. Inspired by our previous work that graphene could help enhancing the activity of electro-catalysts, here, we propose to adopt graphene to support indium based nano-catalyst for electro-catalytic conversion of CO2 to formic acid. Firstly,we intend to find out the catalytic active species and co-catalytic component based on model indium catalyst, and then prepare indium based nano-catalyst supported on graphene with a high density of active sites. The structure,composition, and electrocatalytic activity of indium-based nano-catalyst will be characterized by ICP-AES, XRD, TEM, XPS and electrolysis experiments. Combined with the electro-catalytic performance of indium-based catalysts, the relationship between the catalytic performance and the structure will be explored. This study will accumulate experimental data and basic theory for the research and development of electro-catalytic conversion CO2 to formic acid.