文献类型：期刊文献

英文题名：Enhanced CO2 Hydrogenation to Methanol over Cu-ZnO Catalyst Modified with Gallium

作者：Liu, Huiling[1];Wang, Xuguang[1];Liu, Yaxin[1];Xiao, Shuang[1];He, Muqian[1];Liu, Dianhua[1]

机构：[1]East China Univ Sci & Technol, Engn Res Ctr Large Scale Reactor Engn & Technol, Sch Chem Engn,Minist Educ, East China Univ Sci & Technol,Carbon Neutral Joint, Shanghai 200237, Peoples R China

年份：2026

卷号：65

期号：13

起止页码：6958

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20261520474651);WOS:【SCI-EXPANDED(收录号:WOS:001727791600001)】；

基金：This work was supported by the "National Key Research and Development Program of China" (2024YFB4006603) and "National Natural Science Foundation of China" (22478108).

语种：英文

外文关键词：Carbon dioxide - Catalyst activity - Catalyst selectivity - Chemical activation - Copper - Copper compounds - Cost effectiveness - Efficiency - Hydrogen - Hydrogenation - Methanol - Zinc oxide

摘要：In the hydrogenation of carbon dioxide to methanol, Cu-ZnO-based catalysts offer significant advantages in terms of synergistic properties and cost-effectiveness. However, enhancing the catalytic efficiency of the catalyst remains a challenge. This study investigated the effect of gallium as a promoter in Cu-ZnO catalysts on their activity for methanol synthesis. The results demonstrate that Ga doping not only increases the population of oxygen vacancies in the catalyst, thereby improving the adsorption and activation of CO2, but also optimizes the H2 activation pathway, promoting hydrogen spillover on Cu sites and facilitating the rapid conversion of key intermediates such as formate and methoxy species along the formate pathway, which collectively enhances catalytic efficiency. Under reaction conditions of 230 degrees C, 5.0 MPa, and GHSV of 3000 mL & centerdot;g-1 & centerdot;h-1, the CZG-0.5 catalyst demonstrated excellent stability over 180 h, during which the optimal CO2 conversion and methanol selectivity reached 37.49% and 80.05%, respectively. This work elucidates the role of Ga doping in promoting the performance of Cu-ZnO-based catalysts, providing new insights for the design of efficient CO2-to-methanol hydrogenation catalysts.