文献类型：期刊文献

英文题名：Anionic Surfactant-Tuned Interfacial Water Reactivity Promoting Electrocatalytic CO2 Reduction

作者：Ge, Wangxin[1,2];Zhu, Yihua[2];Wang, Haiyan[1,3];Jiang, Hongliang[1];Li, Chunzhong[1,2,4]

机构：[1]East China Univ Sci & Technol, Minist Educ, Sch Chem Engn, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Engn Res Ctr Hierarch Nanomat, Shanghai 200237, Peoples R China;[3]Henan Normal Univ, Sch Chem & Chem Engn, Xinxiang 453007, Henan, Peoples R China;[4]Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Dept Chem Engn, Shanghai 200240, Peoples R China

年份：2024

卷号：14

期号：23

起止页码：18156

外文期刊名：ACS CATALYSIS

收录：;EI(收录号：20244817424978);WOS:【SCI-EXPANDED(收录号:WOS:001363138200001)】；

基金：This work was supported by the National Natural Science Foundation of China (22222804 and U22B20143), the National Key R&D program (2022YFB3808400), the Science and Technology Commission of Shanghai Municipality (22dz1205900), and the Shanghai Municipal Science and Technology Major Project.

语种：英文

外文关键词：CO2 electroreduction; electrolyte engineering; electrode-electrolyte interface; anionic effect; surfactants; in situ spectroscopy

摘要：The effects of the electrical double layer (EDL), which pertain to the compositions and interactions among electrolyte species, significantly impact the catalytic process. There is a pressing need to investigate the role of electrolyte components and to deepen our understanding of EDL effects. In this study, we tune the water activity within a range of anionic surfactants featuring different functional groups to adjust H-2 evolution activity and CO2 reduction selectivity. We demonstrate that these anionic surfactants are active in the local reaction environment under a cathodic potential. The enhanced selectivity of CO2 to CO can be attributed to the robust interfacial hydrogen-bonding network reformed by the anionic surfactants. This network diminishes the water dissociation activity and promotes the hydrogenation step in CO2 reduction. Notably, the electrolyte incorporating anionic surfactants improves the CO2 reduction performance, registering CO Faradaic efficiencies of 89.7% (RSO3-, SDS), 97.5% (RSO4-, SLS), 98.4% (RPO42-, SMP), and 98.9% (RCOO-, SL) at -1.2 V versus RHE, thereby outperforming the blank KHCO3 electrolyte (53.1%). This research underscores the crucial influence of anionic additives in the CO2RR.