Chloride Ion Adsorption Enables Ampere-Level CO2 Electroreduction over Silver Hollow Fiber
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作者
Li, Shoujie; Dong, Xiao; Zhao, Yonghui; Mao, Jianing; Chen, Wei; Chen, Aohui; Song, Yanfang; Li, Guihua; Jiang, Zheng; Wei, Wei; Sun, Yuhan
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刊物名称
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
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年、卷、文献号
2022, 61, 1433-7851
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关键词
Li, Shoujie; Dong, Xiao; Zhao, Yonghui; Mao, Jianing; Chen, Wei; Chen, Aohui; Song, Yanfang; Li, Guihua; Jiang, Zheng; Wei, Wei; Sun, Yuhan
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摘要
Electrochemical conversion of CO2 into valuable feedstocks is a promising strategy for carbon neutrality. However, it remains a challenge to possess a large current density, a high faradaic efficiency and excellent stability for practical applications of CO2 utilization. Herein, we report a facile tactic that enables exceedingly efficient CO2 electroreduction to CO by virtue of low-coordination chloride ion (Cl-) adsorption on a silver hollow fiber (Ag HF) electrode. A CO faradaic efficiency of 92.3 % at a current density of one ampere per square centimeter (1 A cm(-2)) in 3.0 M KCl with a sustained performance observed during a 150-hour test was achieved, which is better than state-of-the-art electrocatalysts. The electrochemical results and density functional theory (DFT) calculations suggested a low-coordination Cl- adsorption on surface of Ag HF, which not only suppressed the competitive hydrogen evolution reaction (HER), but also facilitated the CO2 reduction kinetics.
