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Updated: Jun 9, 2025

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Constructing Ag/Cu2O Interface for Efficient Neutral CO2 Electroreduction to C2H4
Zongnan Wei1,2, Wenwen Wang2, Tao Shao2
1Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China.
Abstract:
Neutral CO2 electroreduction to multi-carbons (C2+) offers a promising pathway to reduce the CO2 and energy losses originating from the carbonate formation. However, the sluggish kinetics of C-C coupling brings a significant challenge of achieving high selectivity of a single product (such as ethylene), especially at industrial-relevant current densities (>300 mA cm-2). Here, we reported an optimized Ag-Cu2O interfacial catalyst that exhibited C2+ Faradaic efficiency (FE) of 73.6 % at 650 mA cm-2 in a flow cell. Remarkably, it obtained FEC2H4 of 66.0 % with a partial current density of 429.1 mA cm-2, making it stand out among the reported Cu-based electrocatalysts. In situ Raman spectra uncovered that the Ag/Cu2O interfaces enabled a high coverage of *CO around the partially reduced Cu+/Cu0 active sites. Furthermore, theoretical calculations demonstrated the enhanced CO formation and C-C coupling at the Ag/Cu2O interface. This work reported an unprecedented neutral CO2 electroreduction to C2H4 performance and provided an in-depth comprehension of the role of the bimetallic interface.
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