Journal
NATURE COMMUNICATIONS
Volume 13, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41467-022-29428-9
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Funding
- National Key R&D Program of China [2018YFA0306900]
- National Natural Science Foundation of China [51872012]
- Fundamental Research Funds for the Central Universities
- 111 Project [B17002]
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In this study, a facile and scalable anodic corrosion method was used to synthesize oxygen-rich CuO nanoplate arrays. The self-evolution process led to the formation of stable Cu/Cu2O heterogeneous interfaces, which significantly improved the C2H4 production and stability in CO2 electroreduction.
Electrochemical reduction of CO2 to multi-carbon fuels and chemical feedstocks is an appealing approach to mitigate excessive CO2 emissions. However, the reported catalysts always show either a low Faradaic efficiency of the C2+ product or poor long-term stability. Herein, we report a facile and scalable anodic corrosion method to synthesize oxygen-rich ultrathin CuO nanoplate arrays, which form Cu/Cu2O heterogeneous interfaces through self-evolution during electrocatalysis. The catalyst exhibits a high C2H4 Faradaic efficiency of 84.5%, stable electrolysis for similar to 55 h in a flow cell using a neutral KCI electrolyte, and a full-cell ethylene energy efficiency of 27.6% at 200 mA cm(-2) in a membrane electrode assembly electrolyzer. Mechanism analyses reveal that the stable nanostructures, stable Cu/Cu2O interfaces, and enhanced adsorption of the *OCCOH intermediate preserve selective and prolonged C2H4 production. The robust and scalable produced catalyst coupled with mild electrolytic conditions facilitates the practical application of electrochemical CO2 reduction.
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