Highly efficient ampere-level CO2 reduction to multicarbon products via stepwise hollow-fiber penetration electrodes
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作者
Dong, Xiao; Li, Shoujie; Zhu, Chang; Mao, Jianing; Wu, Gangfeng; Li, Guihua; Feng, Guanghui; Chen, Aohui; Wei, Yiheng; Liu, Xiaohu; Wang, Jiangjiang; Song, Yanfang; Chen, Wei; Wei, Wei
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刊物名称
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
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年、卷、文献号
2023, 336, 1873-3883
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关键词
Dong, Xiao; Li, Shoujie; Zhu, Chang; Mao, Jianing; Wu, Gangfeng; Li, Guihua; Feng, Guanghui; Chen, Aohui; Wei, Yiheng; Liu, Xiaohu; Wang, Jiangjiang; Song, Yanfang; Chen, Wei; Wei, Wei
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摘要
Efficient C2+ production from CO2 electrocatalytic reduction exhibits significant promise but suffers from low selectivity and undesired side reactions. Stepwise electroreductions of CO2 to CO and then to C2+ products can benefit from the perfect cooperation of the first high CO production efficiency and the subsequent favorable C-C coupling kinetics of CO. Herein, by virtue of serial Ag and Cu hollow-fiber penetration electrodes, a highefficiency CO2 electroreduction to C2+ products is achieved with a partial current density of 1.8 A cm-2 and a faradaic efficiency of 90.5 %. Experimental results and density functional theory calculations demonstrate that the synergetic combination of unique penetration effect induced by hierarchical micro/nanostructured hollow fiber configurations and regulated electronic structures by chloride ion adsorption, is responsible for the superior activity. This work provides a facile tactic and encouraging headway to design applicable efficient CO2 electrocatalytic reduction systems towards high-value C2+ chemicals.
