Exploring the impact of Nafion modifier on electrocatalytic CO_(2) reduction over Cu catalyst  

作　　者：Yingshi Su Yonghui Cheng Zhen Li Yanjia Cui Caili Yang Ziyi Zhong Yibing Song Gongwei Wang Lin Zhuang 

机构地区：[1]College of Chemistry&Chemical Engineering and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province,Shantou University,Shantou 515063,Guangdong,China [2]College of Chemistry and Molecular Sciences,Hubei Key Lab of Electrochemical Power Sources,Wuhan University,Wuhan 430072,Hubei,China [3]The Institute for Advanced Studies,Wuhan University,Wuhan 430072,Hubei,China [4]Department of Chemistry Engineering,Guangdong Technion-Israel Institute of Technology(GTIIT),Shantou 515063,Guangdong,China [5]Technion-Israel Institute of Technology(IIT),Haifa 32000,Israel

出　　处：《Journal of Energy Chemistry》2024年第1期543-551,I0012,共10页能源化学（英文版）

基　　金：financially supported by the Natural Science Foundation of Guangdong Province (2022A1515012359);the National Natural Science Foundation of China (21902121);the STU Scientific Research Foundation for Talents (NTF21020);the 2020 Li Ka Shing Foundation Cross-Disciplinary Research Grant (2020LKSFG09A)。

摘　　要：Nafion as a universal polymer ionomer was widely applied for nanocatalysts electrode preparation.However,the effect of Nafion on electrocatalytic performance was often overlooked,especially for CO_(2)electrolysis.Herein,the key roles of Nafion for CO_(2)RR were systematically studied on Cu nanoparticles(NPs)electrocatalyst.We found that Nafion modifier not only inhibit hydrogen evolution reaction(HER)by decreasing the accessibility of H_(2)O from electrolyte to Cu NPs,and increase the CO_(2)concentration at electrocatalyst interface for enhancing the CO_(2)mass transfer process,but also activate CO_(2)molecule by Lewis acid-base interaction between Nafion and CO_(2)to accelerate the formation of^(*)CO,which favor of C–C coupling for boosting C_(2)product generation.Owing to these features,the HER selectivity was suppressed from 40.6%to 16.8%on optimal Cu@Nafion electrode at-1.2 V versus reversible hydrogen electrode(RHE),and as high as 73.5%faradaic efficiencies(FEs)of C_(2)products were achieved at the same applied potential,which was 2.6 times higher than that on bare Cu electrode(~28.3%).In addition,Nafion also contributed to the long-term stability by hinder Cu NPs morphology reconstruction.Thus,this work provides insights into the impact of Nafion on electrocatalytic CO_(2)RR performance.

关 键 词：Nafion modifier CO_(2)reduction Cu nanoparticles In situ ATR-SEIRAS C_(2)product 

分 类 号：O643.36[理学—物理化学]