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An Extrinsic Faradaic Layer on CuSn for High-Performance Electrocatalytic CO_(2) Reduction

查看全文 作　　者：Feilong [1]Ren;Wenjian [2]Hu;Cheng [2]Wang;Pin [1]Wang;Wenbo [2]Li;Congping [1]Wu;Yingfang [2]Yao;Wenjun [2]Luo;Zhigang [1,2]Zou 高影响力作者 机构地区：[1]Eco-Materials and Renewable Energy Research Center(ERERC),Jiangsu Key Laboratory for Nano Technology,National Laboratory of Solid State Microstructures,Department of Physics,Nanjing University,Nanjing 210093;[2]National Laboratory of Solid State Microstructures,College of Engineering and Applied Sciences,Nanjing University,Nanjing 210093高影响力机构 出　　处：《CCS Chemistry》索引2022年第4卷第5期,共9页高影响力期刊 基　　金：supported by the National Key R&D Program of China(nos.2017YFE0120700 and 2018YFE0208500);the National Natural Science Foundation of China(nos.21875105 and 51972164);the National Scientific Instrument Development Major Project of National Natural Science Foundation of China(no.51627810);Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory(no.XHD2020-002). 摘　　要：An intrinsic Faradaic layer on the surface of a metal electrocatalyst is usually considered an active site for CO_(2) reduction.Different strategies have been used to improve the performance of CO_(2) reduction by adjusting the intrinsic Faradaic layer.However,it is still challenging to achieve CO_(2) reduction with high activity,selectivity,and stability.In this study,for the first time,we improve the three parameters simultaneously by introducing a Zn(OH)_(x) over layer onto a CuSn electrocatalyst.We find that the intrinsic Faradaic layer of Sn(OH)_(x) on the surface of CuSn provides active sites for CO_(2) reduction,while Zn(OH)_(x) plays multiple roles as an adsorption/activation layer,a cover layer,and a protective layer.Further studies suggest that the enhanced activity comes from a Faradaic reaction of Zn(OH)_(x) during CO_(2) reduction,which can be considered as an extrinsic Faradaic layer.This new strategy of introducing an extrinsic Faradaic layer can deepen understanding of electrocatalytic process and offers guidance to design other high-performance electrocatalysts. 关 键 词：CO_(2)reduction extrinsic Faradaic layer active sites multiple roles spill over
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