Phase and structure engineering of copper tin heterostructures for efficient electrochemical carbon dioxide reduction
Pengtang Wang1 , Man Qiao2, Qi Shao1 , Yecan Pi1 , Xing Zhu3, Yafei Li2& Xiaoqing Huang1, *（黄小青）
1 College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 215123 Jiangsu, China.
2 Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, 210023 Nanjing, China.
3 Testing & Analysis Center, Soochow University, 215123 Jiangsu, China.
These authors contributed equally: Pengtang Wang, Man Qiao
NATURE COMMUNICATIONS， (2018) 9:4933
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 VRHEto −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 CO2reduction and beyond.