文献类型：期刊文献

英文题名：In-situ self-assembled Cu2O/ZnO core-shell catalysts synergistically enhance the durability of methanol steam reforming

作者：Zhang, Guiru[1];Zhao, Jiali[1];Yang, Taotao[1];Zhang, Qi[1];Zhang, Li[2]

机构：[1]East China Univ Sci & Technol, Dept Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Dept Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2021

卷号：616

外文期刊名：APPLIED CATALYSIS A-GENERAL

收录：;EI(收录号：20211410160756);WOS:【SCI-EXPANDED(收录号:WOS:000640898100002)】；

基金：This work was financially supported by the Fundamental Research Funds for the Central Universities (NO. 50321012117013) , Natural Science Foundation of Shanghai (NO. 16ZR1408200) and National Natural Science Foundation of China (NO. 51776074) .

语种：英文

外文关键词：Hydrogen production; Methanol steam reforming; Copper catalyst; Cu; ZnO; Al; Synergistic site

摘要：The CuZnO catalyst with excellent low-temperature catalytic activity is widely used in methanol steam reforming (MSR). Here, a series of CuZnO/?-Al2O3/Al catalysts were prepared by a two-step impregnation method using structured ?-Al2O3/Al support. The unique synergistic effect of Cu2O/ZnO on MSR was found by the experimental and numerical investigation. The experimental characterization results show that the decoration of ZnO can regulate the content of Cu+ on the catalytic surface, and the increase of Cu+ shortens the self-activation response time of the catalyst. During the self-activation process, ZnO-encapsulated Cu nanoparticles (Cu NPs) surface induced by strong metal-support interaction (SMSI) was observed. The encapsulation not only inhibited the agglomeration of Cu NPs but also formed a large number of new Cu2O/ZnO synergistic sites. Furtherly, the numerical calculation show that the Cu2O/ZnO synergistic sites significantly reduced the activation energy of methoxy dehydrogenation (the rate-determining step of MSR).