文献类型：期刊文献

英文题名：A High Efficient Cupd0.1/Γ-Al2o3 Catalyst with Isolated Pd Species for Co2 Hydrogenation to Methanol

作者：Liu, Xiaohui[1]; Pan, Hongxin[1]; Ma, Baorun[1]; Zhou, Lihui[2]; Hu, Yongfeng[3]; Shakouri, Mohsen[3]; 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 of Technology, Shanghai, 200237, China; [2] School of Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, East China University of Science and Technology, Shanghai, 200237, China; [3] Canadian Light Source Inc., 44 Innovation Boulevard, Saskatoon, SK, S7N 2V3, Canada

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220444114)

语种：英文

外文关键词：Alumina - Aluminum oxide - Binary alloys - Carbon dioxide - Catalysts - Copper - Hydrogen - Hydrogenation - Palladium

摘要：CO2 hydrogenation is one of the most effective solutions for mitigating excessive CO2 emissions. In this work, CuPdx/γ-Al2O3 (x=0.05-5.7 wt%) catalysts were prepared and applied in CO2 hydrogenation to methanol. The activity results show CuPd0.1/γ-Al2O3 achieves the highest CO2 conversion. It is demonstrated that Pd species in CuPd0.1/γ-Al2O3 is highly dispersed on γ-Al2O3 support at atomic level and separated from Cu nanoparticles by AC-HAADF-STEM, rather than forming CuPd alloy. Part of hydrogen species activated on isolated Pd species overflows onto γ-Al2O3 and influences reduction of Cu species, thus effectively increases Cu+/(Cu++Cu0) ratio which is correlated with good CO2 hydrogenation activity. On the other hand, retention of methanol on CuPdx/γ-Al2O3 surface leads to further reforming of methanol to CO, which change methanol selectivity. To shorten retention of methanol, CO2 hydrogenation in fixed bed at high space velocity is performed, where methanol yields of 5.9 mmol/gcat./h were obtained on CuPd0.1/γ-Al2O3. ? 2022, The Authors. All rights reserved.