Revealing the Promoting Eff ect of CeO_(2)on the Cu/ZnO Catalyst for Methanol Steam Reforming  

作　　者：Mengyuan Zhu Didi Li Zhaocong Jiang Shiqing Jin Qing Zhang Haoyuan Gu Yi-Fan Han Minghui Zhu 

机构地区：[1]State Key Laboratory of Green Chemical Engineering and Industrial Catalysis,School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China [2]Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Transactions of Tianjin University》2024年第6期544-552,共9页天津大学学报（英文版）

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);Shanghai Super Postdoctoral Fellow.

摘　　要：Cu-based catalysts have been extensively used in methanol steam reforming(MSR)reactions because of their low cost and high effi ciency.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,CeO_(2)-doped Cu/ZnO catalysts were prepared using the coprecipitation method,and the eff ects of CeO_(2)on Cu-based catalysts were systematically investigated.Doping with appropriate CeO_(2)amounts could stabilize small Cu nanoparticles through a strong interaction between CeO_(2)and Cu,leading to the formation of more Cu+–ZnO x interfacial sites.However,higher CeO_(2)contents resulted in the formation of larger Cu nanoparticles and an excess of Cu+–CeO x interfacial sites.Consequently,the Cu/5CeO_(2)/ZnO catalyst with maximal Cu–ZnO interfaces exhibited the highest H 2 production rate of 94.6 mmolH2/(gcat·h),which was 1.5 and 10.2 times higher than those of Cu/ZnO and Cu/CeO_(2),respectively.

关 键 词：Methanol steam reforming Cu/ZnO catalyst CeO_(2)promoter Metal–support interaction Interfacial site 

分 类 号：TQ116.2[化学工程—无机化工] O643.36[理学—物理化学]