Affiliation:
1. Shenzhen Geim Graphene Center Tsinghua‐Berkeley Shenzhen Institute & Institute of Materials Research Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 P. R. China
2. Department of Materials Science and Engineering and State Key Laboratory of Marine Pollution City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong 999077 P. R. China
3. Shenzhen Research Institute City University of Hong Kong Shenzhen 518057 P. R. China
Abstract
AbstractThe carbon dioxide reduction reaction (CO2RR) driven by electricity can transform CO2 into high‐value multi‐carbon (C2+) products. Copper (Cu)‐based catalysts are efficient but suffer from low C2+ selectivity at high current densities. Here La(OH)3 in Cu catalyst is introduced to modify its electronic structure towards efficient CO2RR to C2+ products at ampere‐level current densities. The La(OH)3/Cu catalyst has a remarkable C2+ Faradaic efficiency (FEC2+) of 71.2% which is 2.2 times that of the pure Cu catalyst at a current density of 1,000 mA cm−2 and keeps stable for 8 h. In situ spectroscopy and density functional theory calculations both show that La(OH)3 modifies the electronic structure of Cu. This modification favors *CO adsorption, subsequent hydrogenation, *CO─*COH coupling, and consequently increases C2+ selectivity. This work provides a guidance on facilitating C2+ product formation, and suppressing hydrogen evolution by La(OH)3 modification, enabling efficient CO2RR at ampere‐level current densities.
Funder
National Science Fund for Distinguished Young Scholars
National Natural Science Foundation of China
Guangdong Innovative and Entrepreneurial Research Team Program
Basic and Applied Basic Research Foundation of Guangdong Province
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry