### 单原子配位结构及与载体相互作用的调控用于二氧化碳电催化还原

1. 1. 北京化工大学化学工程学院, 有机-无机复合材料国家重点实验室, 北京 100029;
2. 北京理工大学材料科学与工程学院, 北京环境科学与工程重点实验室, 北京 100081;
3. 京博哥大学化学系, 京博哥, 坎帕拉 999123, 乌干达;
4. 华威大学物理系, 考文垂 CV4 7AL, 英国
• 收稿日期:2022-07-12 录用日期:2022-07-29 发布日期:2022-08-03
• 通讯作者: 谭心怡, 孙振宇 E-mail:monica950521@126.com;sunzy@mail.buct.edu.cn
• 基金资助:
国家自然科学基金(21972010), 北京自然科学基金(2192039)的资助

### Tuning the Coordination Structure of Single Atoms and Their Interaction with the Support for Carbon Dioxide Electroreduction

Yuxin Chen1, Lijun Wang1, Zhibo Yao1, Leiduan Hao1, Xinyi Tan2, Justus Masa3, Alex W. Robertson4, Zhenyu Sun1

1. 1. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China;
2. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing Key Laboratory of Environmental Science and Engineering, Beijing 100081, China;
3. Department of Chemistry, Kyambogo University, Kyambogo, Kampala 999123, Uganda;
4. Department of Physics, University of Warwick, Coventry CV4 7AL, UK
• Received:2022-07-12 Accepted:2022-07-29 Published:2022-08-03
• Contact: Xinyi Tan, Zhenyu Sun E-mail:monica950521@126.com;sunzy@mail.buct.edu.cn
• Supported by:
This work was supported by National Natural Science Foundation of China (21972010) and Beijing Natural Science Foundation (2192039).

Abstract: The combustion of fossil fuels increases atmospheric carbon dioxide (CO2) concentrations, leading to adverse impacts on the planetary radiation balance and, consequently, on the climate. Fossil fuel utilization has contributed to a marked rise in global temperatures, now at least 1.2 ℃ above 'pre-industrial' levels. To meet the 2015 Paris Agreement target of 1.5 ℃ above pre-industrial levels, considerable efforts are required to efficiently capture and utilize CO2. Among the different strategies developed for converting CO2, electrochemical CO2 reduction (ECR) to valuable chemicals using renewable energy is expected to revolutionize the manufacture of sustainable "green" chemicals, thereby achieving a closed anthropogenic carbon cycle. However, CO2 is a thermodynamically stable and kinetically inert molecule that requires high electrical energy to bend the linear O＝C＝O bond by attacking the C atom. To facilitate the ECR with good energy efficiency, it is essential to lower the reaction overpotential as well as maintain a high current density and desirable product selectivity; therefore, the design and development of advanced electrocatalysts are crucial. A plethora of heterogeneous and homogeneous materials has been explored in the ECR. Among these materials, single-atom catalysts (SACs) have been the focus of most extensive research in the context of ECR. A SAC with isolated metal atoms dispersed on a supporting host exhibits a unique electronic structure, well-defined coordination environment, and an extremely high atom utilization maximum; thus, SACs have emerged as promising materials over the last two decades. Single-atom catalysis has covered the periodic table from d-block and ds-block metals to p-block metals. The types of support materials for SACs, ranging from metal oxides to tailored carbon materials, have also expanded. The adsorption strength and catalytic activity of SACs can be effectively tuned by modulating the central metal and local coordination structure of the SACs. In this article, we discuss the progress made to date in the field of single-atom catalysis for promoting ECR. We provide a comprehensive review of state-of-the-art SACs for the ECR in terms of product distribution, selectivity, partial current density, and performance stability. Special attention is paid to the modification of SACs to improve the ECR efficiency. This includes tailoring the coordination of the heteroatom, constructing bimetallic sites, engineering the morphologies and surface defects of supports, and regulating surface functional groups. The correlation of the coordination structure of SACs and metal-support interactions with ECR performance is analyzed. Finally, development opportunities and challenges for the application of SACs in the ECR, especially to form multi-carbon products, are presented.

MSC2000:

• O642