文献类型：期刊文献

英文题名：Amplifying cation effects on high-curvature nanostructures via enhancing interfacial electric field for CO2RR to multicarbon product

作者：Tang, Weizheng[1];Shen, Yongjun[1];Yang, Yu[3,4];Li, Congcong[1];Li, Yu[1];Yin, Shixin[1];Li, Fengwang[3,4];Li, Huihui[1];Li, Chunzhong[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[3]Univ Sydney, Sch Chem & Biomol Engn, Sydney, NSW 2006, Australia;[4]Univ Sydney, ARC Ctr Excellence Green Electrochem Transformat C, Sydney, NSW 2006, Australia

年份：2025

卷号：18

期号：3

外文期刊名：NANO RESEARCH

收录：;EI(收录号：20251318117886);WOS:【SCI-EXPANDED(收录号:WOS:001447263400001)】；

基金：This work was 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) and 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) .

语种：英文

外文关键词：CO2 reduction reaction (CO2RR); cation effect; interfacial electric field; surface charge density; high-curvature nanostructure

摘要：Cation effect has emerged as a promising strategy for modulating the product distribution during the electrocatalytic CO2 reduction reaction (CO2RR). 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 (C2+) 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 CO2RR performance.