文献类型：期刊文献

英文题名：Structure-activity relationships of zirconium-modified copper-based catalysts during methanol steam reforming

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

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2024

卷号：436

外文期刊名：JOURNAL OF CATALYSIS

收录：;EI(收录号：20242416228128);WOS:【SCI-EXPANDED(收录号:WOS:001251565400001)】；

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 (2022158) .

语种：英文

外文关键词：Methanol Steam Reforming; Copper-Based Catalyst; Zirconium; Metal-Support Interfacial sites

摘要：Acknowledged as an ideal method for in situ hydrogen generation, methanol steam reforming (MSR) requires high-performance catalysts to enhance production efficiency. Herein, we prepared a series of Zr-modified Cubased catalysts by a coprecipitation method and conducted a systematic analysis of the impacts of structural variations on MSR performance. Extensive characterization reveals a strong dependence of the catalyst's surface structure on Zr content. Introducing a moderate amount of Zr to the Cu/ZnO catalysts forms ZnZrOx solid solution and increases Cu dispersion, forming more Cu-ZnZrOx and Cu-ZnO interfacial sites with higher H2 production rate. Further increases in Zr content enlarge Cu nanoparticles and multiply Cu-ZrO2 interfacial sites. The optimal catalyst with a Zn/Zr molar ratio of 5, with the richest Cu-ZnO/Cu-ZnZrOx interfacial sites, achieves the highest H2 production rate of 117.4 mmolH2 g-1cat h-1 at 200 degrees C, which is 1.3 times and 6.8 times higher than those of Cu/ZnO and Cu/ZrO2, respectively.