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Abstract

Electroreduction of carbon dioxide (CO2) into multicarbon products is of significant research and commercial interest. However, ethanol (EtOH) production efficiency is impractically low due to limited selectivity. This paper reports a silver-modified copper-oxide catalyst (dCu2O/Ag2.3%) exhibiting a Faradaic efficiency of 40.8% and energy efficiency of 22.3% for EtOH production, achieving CO2-to-ethanol conversion under high current operation. In situ studies show that Ag modification optimizes surface Cu sites, steering CO adsorption to trigger asymmetric C-C coupling for EtOH intermediate stabilization.

Publisher

Nature Communications

Published On

Jun 29, 2022

Authors

Pengtang Wang, Hao Yang, Cheng Tang, Yu Wu, Yao Zheng, Tao Cheng, Kenneth Davey, Xiaoqing Huang, Shi-Zhang Qiao

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