Amplifying cation effects on high-curvature nanostructures via enhancing interfacial electric field for CO_(2)RR to multicarbon product  

作　　者：Weizheng Tang Yongjun Shen Yu Yang Congcong Li Yu Li Shixin Yin Fengwang Li Huihui Li Chunzhong Li 

机构地区：[1]Key Laboratory for Ultrafine Materials of Ministry of Education,School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China [2]Shanghai Engineering Research Center of Hierarchical Nanomaterials,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China [3]School of Chemical and Biomolecular Engineering,The University of Sydney,NSW 2006,Australia [4]ARC Centre of Excellence for Green Electrochemical Transformation of Carbon Dioxide,The University of Sydney,NSW 2006,Australia

出　　处：《Nano Research》2025年第3期178-186,共9页纳米研究(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.U22B20143 and 22478121);Shanghai Municipal Science and Technology Major Project,the Science and Technology Commission of Shanghai Municipality(No.22dz1205900);the Fundamental Research Funds for the Central Universities(No.JKD01241702);F.W.L.acknowledges the financial support from the ARC Centre of Excellence for Green Electrochemical Transformation of Carbon Dioxide(No.CE230100017).

摘　　要：Cation effect has emerged as a promising strategy for modulating the product distribution during the electrocatalytic CO_(2)reduction reaction(CO_(2)RR).However,the strategy of solely increasing bulk cation concentration in the electrolyte to intensify cation effect at the electrode interface exacerbates carbonate formation issue.Therefore,it is crucial to achieve local cation enrichment at the electrolyte interface without increasing bulk cation concentration.Herein,we propose a"surface charge density modulation"strategy to strengthen interfacial electric field,intensifying the local cation effect at the electrode interface in a low-concentration electrolyte.We implement this strategy using leaf-like CuO nanosheets,introducing a high-curvature morphology into the catalysts.As a result,the CuO nanosheets display 3.4-fold enhancement in Faradic efficiency(FE)of multi-carbon products(C_(2+))compared to CuO nanospheres with low-curvature.In-situ Raman spectroscopy and control experiment varying concentration of K^(+)reveal the mechanism on how the cation effect and interfacial electric field influence CO_(2)RR performance.

关 键 词：CO_(2)reduction reaction(CO_(2)RR) cation effect interfacial electric field surface charge density high-curvature nanostructure 

分 类 号：TB383[一般工业技术—材料科学与工程]