Selective CO Electroreduction to Multicarbon Oxygenates Over Atomically Dispersed Cu–Ag Sites in Alkaline Membrane Electrode Assembly Electrolyzer
Year: 2025
Type: article
Abstract: Electrochemical carbon monoxide reduction reaction (CORR) to produce multicarbon (C 2+ ) oxygenates using renewable electricity is a promising carbon utilization pathway. However, the performance of this process suffers from low C 2+ oxygenates selectivity and insufficient current density. Here, we employed a Cu–Ag bimetallic strategy to enhance the selectivity of C 2+ oxygenates from CORR in alkaline membrane electrode assembly electrolyzer at ampere‐level current densities. The Cu–Ag catalysts prepared by magnetron sputtering feature atomically dispersed Cu–Ag sites on the catalyst surface, which are key to promoting the formation of C 2+ oxygenates. Increasing Ag content favors C 2+ oxygenates formation while inhibiting ethylene production. The optimized Cu 2 Ag catalyst achieved Faradaic efficiency of 71.4% for C 2+ oxygenates at 2.5 A cm −2 . In situ spectroscopy and density functional theory calculations revealed that atomically dispersed Cu–Ag sites on the catalyst surface promote the dissociation of *COCOH to *CCO, thus favoring C 2+ oxygenates formation.
Authors: Xinhui Guo, Tianfu Liu, Yanpeng Song, Rongtan Li, Pengfei Wei, Ziqi Liao, Zichao Wu, Dunfeng Gao, Qiang Fu, Guoxiong Wang, Xinhe Bao
Institutions: Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Collaborative Innovation Center of Chemistry for Energy Materials, University of Chinese Academy of Sciences, State Key Laboratory of Catalysis, University of Science and Technology of China, Fudan University
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4410153231