文献类型：期刊文献

英文题名：Efficient Co2 Catalytic Hydrogenation Over Cuox-Zno/ Silicalite-1 with Stable Cu+ Species

作者：Liu, Xiaohui[1]; Ma, Baorun[1]; Pan, Hongxin[1]; Yang, Fan[2]; Guo, Yong[1]; Wang, Yanqin[1]

机构：[1] Shanghai Key Laboratory of Functional Materials Chemistry, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220112140)

语种：英文

外文关键词：Carbon dioxide - Carboxylation - Copper oxides - Hydrogenation - II-VI semiconductors - Nanocatalysts - Silicon compounds

摘要：Cu-based/SiO2 nanocatalysts with Cu0 or Cu+ species as active sites have been widely investigated for CO2 hydrogenation. Here, 10CuO/silicalite-1(S-1) and 10CuO-2ZnO/S-1 catalysts were cheap prepared by wet impregnation. 7.5% conversion of CO2 can be reached and kept for 100 h over 10CuO-2ZnO/S-1 at 250°C and 3MPa. XPS and in-situ CO-DRIFT show that only Cu+ species exists on both catalysts surface due to silanol nests from S-1. Moreover, there is a synergism between Cu+ species and ZnO on 10CuO-2ZnO/S-1 confirmed by H2 -TPR and in-situ H-D exchange DRIFT, in which ZnO is responsible for H2 dissociation and the Cu+ species of ZnO-Cu2O interface adsorbs CO2. Subsequently, the adsorbed CO2 is hydrogenated to CO via the carboxylate pathway byH species generated from ZnO. This work provides a new insight into the Cu-based/SiO2 , which ZnO-Cu2O interface and silanol nests from S-1 play the key role for CO2 hydrogenation efficiently and steadily. ? 2022, The Authors. All rights reserved.