Phase and structure engineering of copper tin heterostructures for efficient electrochemical carbon dioxide reduction

Pengtang Wang, Man Qiao, Qi Shao, Yecan Pi, Xing Zhu, Yafei Li and Xiaoqing Huang ()
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Pengtang Wang: Soochow University
Man Qiao: Nanjing Normal University
Qi Shao: Soochow University
Yecan Pi: Soochow University
Xing Zhu: Soochow University
Yafei Li: Nanjing Normal University
Xiaoqing Huang: Soochow University

Nature Communications, 2018, vol. 9, issue 1, 1-10

Abstract: Abstract While engineering the phase and structure of electrocatalysts could regulate the performance of many typical electrochemical processes, its importance to the carbon dioxide electroreduction has been largely unexplored. Herein, a series of phase and structure engineered copper-tin dioxide catalysts have been created and thoroughly exploited for the carbon dioxide electroreduction to correlate performance with their unique structures and phases. The copper oxide/hollow tin dioxide heterostructure catalyst exhibits promising performance, which can tune the products from carbon monoxide to formic acid at high faradaic efficiency by simply changing the electrolysis potentials from −0.7 VRHE to −1.0 VRHE. The excellent performance is attributed to the abundant copper/tin dioxide interfaces involved in the copper oxide/hollow tin dioxide heterostructure during the electrochemical process, decreasing the reaction free-energies for the formation of COOH* species. Our work reported herein emphasizes the importance of phase and structure modulating of catalysts for enhancing electrochemical CO2 reduction and beyond.

Date: 2018
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DOI: 10.1038/s41467-018-07419-z

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