Hierarchical micro/nanostructured silver hollow fiber boosts electroreduction of carbon dioxide
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作者
Li, Shoujie; Chen, Wei; Dong, Xiao; Zhu, Chang; Chen, Aohui; Song, Yanfang; Li, Guihua; Wei, Wei; Sun, Yuhan
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刊物名称
NATURE COMMUNICATIONS
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年、卷、文献号
2022, 13,
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关键词
Li, Shoujie; Chen, Wei; Dong, Xiao; Zhu, Chang; Chen, Aohui; Song, Yanfang; Li, Guihua; Wei, Wei; Sun, Yuhan
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摘要
An activated silver hollow fiber electrode enables enhanced triphasic interface reactions and oriented mass transfers synergistically, facilitating efficient CO2 conversion (> 50%) to boost CO production with a current density of 1.26 A center dot cm(-2). Efficient conversion of CO2 to commodity chemicals by sustainable way is of great significance for achieving carbon neutrality. Although considerable progress has been made in CO2 utilization, highly efficient CO2 conversion with high space velocity under mild conditions remains a challenge. Here, we report a hierarchical micro/nanostructured silver hollow fiber electrode that reduces CO2 to CO with a faradaic efficiency of 93% and a current density of 1.26 A center dot cm(-2) at a potential of -0.83 V vs. RHE. Exceeding 50% conversions of as high as 31,000 mL center dot g(cat)(-1) center dot h(-1) CO2 are achieved at ambient temperature and pressure. Electrochemical results and time-resolved operando Raman spectra demonstrate that enhanced three-phase interface reactions and oriented mass transfers synergistically boost CO production.
