文献类型：期刊文献

英文题名：Reaction Pathways for the Highly Selective and Durable Electrochemical Co2 to Co Conversion on Zno Enclosed Ag Nanoparticles in Kcl Electrolyte

作者：Bhalothia, Dinesh[1]; Lee, Da-Wei[2]; Jhao, Guan-Ping[2]; Liu, Hsiao-Yun[2]; Jia, Yanyan[3]; Dai, Sheng[3]; Wang, Kuan-Wen[2]; Chen, Tsan-Yao[1,4]

机构：[1] Department of Engineering and System Science, National Tsing Hua University, Hsinchu, 30013, Taiwan; [2] Institute of Materials Science and Engineering, National Central University, Taoyuan City, 32001, Taiwan; [3] Key Laboratory for Advanced Materials, Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Centre, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai, 200237, China; [4] Hierarchical Green-Energy Materials [Hi-GEM] Research Centre, National Cheng Kung University, Tainan, 70101, Taiwan

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220123750)

语种：英文

外文关键词：Carbon dioxide - Chemisorption - Chlorine compounds - Efficiency - Electrolytes - Electrolytic reduction - II-VI semiconductors - Metal nanoparticles - Molecules - Nanocatalysts - Reaction intermediates - Zinc oxide

摘要：Electrochemical CO2reduction (ECR) has been widely advocated as a promising approach for recycling atmospheric CO2into value-added fuels. In this context, a bimetallic nanocatalyst (NC) comprising ZnO enclosed Ag nanoparticles (NPs) (denoted as (ZnO)3@Ag) is developed for highly selective and durable CO2 to CO electrochemical reduction. For the optimum case, the faradaic efficiency (FE) of (ZnO)3@Ag NC was as high as ～95% in 0.5 M KCl electrolyte at -1.1 V (vs. RHE), which progressively decreased for 0.1 M KCl (89.7%) and 0.1 M KHCO3 (84.6%) electrolytes. Of utmost importance, (ZnO)3@Ag NC exhibited unprecedented stability in 0.5 M KCl electrolyte with only 6.3% decay after 8h. We demonstrate that such an unprecedented ECR performance of (ZnO)3@Ag NC in KCl electrolyte is originated from the chemisorption followed by reduction of CO2 molecule on the Ag atoms, while the neighbouring ZnO domains might serve as the reaction site for storing the chemisorbed reaction intermediates (eg. *COOH) for subsequent reaction pathways. Corresponding ECR pathways in the KHCO3 electrolyte are compared for reference, suggesting the presence of CO32- ions hinder the mass transportation (i.e. the adsorption) of CO2 molecules on the catalyst's surface. Consequently, the ECR performance of (ZnO)3@Ag NC is significantly suppressed. ? 2022, The Authors. All rights reserved.