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作者

Dejin Zang Xuejiao J.Gao Leyun Li Yongge Wei Haiqing Wang

作者单位

Institute of Materia Medica，Shandong First Medical University&Shandong Academy of Medical Sciences，Jinan 250117，China；College of Chemistry and Chemical Engineering，Jiangxi Normal University，Nanchang330022，China；Key Lab of Organic Optoelectronics&Molecular Engineering of Ministry of Education，Department of Chemistry，Tsinghua University，Beijing 100084，China；Institute for Advanced Interdisciplinary Research(iAIR)，School of Chemistry and Chemical Engineering，University of Jinan，Jinan 250022，China

刊名

纳米研究(英文版)

年份

2022

卷号

第15卷

期号

第10期

页码

8872-8879

ISSN

1998-0124

关键词

CO2 reduction Cu-based catalyst Cu/N-doped carbon interface engineering C2 production

摘要

Electroreduction of greenhouse gas CO2 into value-added fuels and chemicals provides a promising pathway to address the issues of energy crisis and environmental change.However,the regulations of the selectivity towards C2 product and the competing hydrogen evolution reactionare major challenges for CO2 reduction reaction.Here,we develop an interface-enhanced strategy by depositing a thin layer of nitrogen-doped grapheneon a Cu foam surfaceto selectively promote the ethanol pathway in CO2RR.Comp...更多

Electroreduction of greenhouse gas CO2 into value-added fuels and chemicals provides a promising pathway to address the issues of energy crisis and environmental change.However,the regulations of the selectivity towards C2 product and the competing hydrogen evolution reactionare major challenges for CO2 reduction reaction.Here,we develop an interface-enhanced strategy by depositing a thin layer of nitrogen-doped grapheneon a Cu foam surfaceto selectively promote the ethanol pathway in CO2RR.Compared to the undetectable ethanol selectivity of pure Cu and Cu@graphene,Cu-N-G has boosted the ethanol selectivity to 33.1％in total Faradic efficiencyat-0.8 V vs.reversible hydrogen electrode.The experimental and density functional theoryresults verify that the interconnected graphene coating can not only serve as the fast charge transport channel but also provide confined nanospace for mass transfer.The N doping can not only trigger the intrinsic interaction between N in N-G and CO2 molecule for enriching the local concentration of reactants but also promote the average valence state of Cu for C-C coupling pathways.The confinement effect at the interface of Cu-N-G can not only provide high adsorbed hydrogencoverage but also stabilize the key*HCCHOH intermediate towards ethanol pathway.The provided interface-enhanced strategy herein is expected to inspire the design of Cu-based CO2RR electrocatalysts towards multi-carbon products收起

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