Citation: Shuaiqiang Jia, Qinggong Zhu, Haihong Wu, Meng'en Chu, Shitao Han, Ruting Feng, Jinghui Tu, Jianxin Zhai, Buxing Han. Efficient electrocatalytic reduction of carbon dioxide to ethylene on copper–antimony bimetallic alloy catalyst[J]. Chinese Journal of Catalysis, ;2020, 41(7): 1091-1098. doi: 10.1016/S1872-2067(20)63542-2 shu

Efficient electrocatalytic reduction of carbon dioxide to ethylene on copper–antimony bimetallic alloy catalyst

a Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China;
b Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Colloid and Interface and Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China

Received Date: 23 October 2019

Fund Project: This work was supported by the National Key R&D Program of China (2017YFA0403102) and the National Natural Science Foundation of China (21573073, 21733011).

The exploration of efficient electrocatalysts for the reduction of CO₂ to C₂H₄ is of significant importance but is also a challenging subject. Cu-based bimetallic catalysts are extremely promising for efficient CO₂ reduction. In this work, we synthesize a series of porous bimetallic Cu-Sb alloys with different compositions for the catalytic reduction of CO₂ to C₂H₄. It is demonstrated that the alloy catalysts are much more efficient than the pure Cu catalyst. The performance of the alloy catalysts depended strongly on the composition. Further, the alloy with a Cu:Sb ratio of 10:1 yielded the best results; it exhibited a high C₂H₄ Faradaic efficiency of 49.7% and a high current density of 28.5 mA cm^-2 at -1.19 V vs. a reversible hydrogen electrode (RHE) in 0.1 M KCl solution. To the best of our knowledge, the electrocatalytic reduction of CO₂ to C₂H₄ using Cu-Sb alloys as catalysts has not been reported. The excellent performance of the porous alloy catalyst is attributed to its favorable electronic configuration, large surface area, high CO₂ adsorption rate, and fast charge transfer rate.
- Carbon dioxide reduction,
- Ethyene,
- Electrocatalyst,
- Copper-antimony bimetallic alloy,
- Synergistic effect
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