文献类型：期刊文献

英文题名：Revealing the Promoting Effect of CeO2 on the Cu/ZnO Catalyst for Methanol Steam Reforming

作者：Zhu, Mengyuan[1];Li, Didi[1];Jiang, Zhaocong[1];Jin, Shiqing[1];Zhang, Qing[1];Gu, Haoyuan[1];Han, Yi-Fan[1,2];Zhu, Minghui[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 200237, Peoples R China;[2]Zhengzhou Univ, Engn Res Ctr Adv Funct Mat Mfg, Minist Educ, Zhengzhou 450001, Peoples R China

年份：2024

卷号：30

期号：6

起止页码：544

外文期刊名：TRANSACTIONS OF TIANJIN UNIVERSITY

收录：EI(收录号：20244717382998);WOS:【ESCI(收录号:WOS:001354485000001)】；

基金：This work was supported by the National Key R&D Program of China (2022YFB3805504), National Natural Science Foundation of China (22078089), China Postdoctoral Science Foundation (2023M731081), Shanghai Pilot Program for Basic Research (22TQ1400100-7), the Basic Research Program of Science and Technology Commission of Shanghai Municipality (22JC1400600), Open Foundation of Shanghai Jiao Tong University Shaoxing Research Institute of Renewable Energy and Molecular Engineering (Grant No. JDSX2022046) and Shanghai Super Postdoctoral Fellow.

语种：英文

外文关键词：Methanol steam reforming; Cu/ZnO catalyst; CeO2 promoter; Metal-support interaction; Interfacial site

摘要：Cu-based catalysts have been extensively used in methanol steam reforming (MSR) reactions because of their low cost and high efficiency. ZnO is often used in commercial Cu-based catalysts as both a structural and an electronic promoter to stabilize metal Cu nanoparticles and modify metal-support interfaces. Still, the further addition of chemical promoters is essential to further enhance the MSR reaction performance of the Cu/ZnO catalyst. In this work, CeO2-doped Cu/ZnO catalysts were prepared using the coprecipitation method, and the effects of CeO2 on Cu-based catalysts were systematically investigated. Doping with appropriate CeO2 amounts could stabilize small Cu nanoparticles through a strong interaction between CeO2 and Cu, leading to the formation of more Cu+-ZnOx interfacial sites. However, higher CeO2 contents resulted in the formation of larger Cu nanoparticles and an excess of Cu+-CeOx interfacial sites. Consequently, the Cu/5CeO(2)/ZnO catalyst with maximal Cu-ZnO interfaces exhibited the highest H-2 production rate of 94.6 mmolH(2)/(g(cat) & sdot; h) , which was 1.5 and 10.2 times higher than those of Cu/ZnO and Cu/CeO2, respectively.