文献类型：期刊文献

英文题名：Polyacrylamide-Mediated Silver Nanoparticles for Selectively Enhancing Electroreduction of CO2 towards CO in Water

作者：Han, Xiaofei[1,2];Liu, Lin[2];Yuan, Jiayi[2];Zhang, Xinsheng[1,2];Niu, Dongfang[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China

年份：2021

卷号：14

期号：2

起止页码：721

外文期刊名：CHEMSUSCHEM

收录：;EI(收录号：20204909578308);WOS:【SCI-EXPANDED(收录号:WOS:000592236800001)】；

基金：We acknowledge the National Natural Science Foundation of China (No. 21972042), and the Student's Platform for Innovation and Entrepreneurship Training Program (No. S19005). We also thank the Research Center of Analysis and Test of East China University of Science and Technology for help with the characterization.

语种：英文

外文关键词：Ag nanoparticles; amide; CO2 reduction; nanohybrid; synergistic catalysis

摘要：Conversion of the greenhouse gas CO2 to value-added products is an important challenge for sustainable energy research. Here, a durably nanohybrid composed of Ag nanoparticles and polyacrylamide was constructed for the selectively electroreduction of CO2 to CO. The nanohybrid exhibited an outstanding CO faradaic efficiency of 97.2 +/- 0.2 % at -0.89 V-RHE (vs. the reversible hydrogen electrode) with a desirable CO partial current density of -22.0 +/- 2.3 mA cm(-2) and maintained the CO faradaic efficiency above 95 % over a wide potential range (-0.79 to -1.09 V-RHE), showing excellent stability during a 48 h prolonged electrolysis. The origins of selective enhancement of CO2 reduction over the nanohybrid stemmed from the activation of CO2 via hydrogen bond and the low basicity of the amide. DFT calculations implied that the synergy of Ag nanoparticles and amide could better stabilize the key intermediate (*COOH) and effectively lower the overpotential of CO2 reduction. These results establish the synergistic effects of organic/inorganic hybrid as a complementary method for tuning selectivity in CO2-to-fuels catalysis.