首页|Revealing the Promoting Effect of CeO2 on the Cu/ZnO Catalyst for Methanol Steam Reforming
Revealing the Promoting Effect of CeO2 on the Cu/ZnO Catalyst for Methanol Steam Reforming
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Revealing the Promoting Effect of CeO2 on the Cu/ZnO Catalyst for Methanol Steam Reforming
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 forma-tion of larger Cu nanoparticles and an excess of Cu+-CeOv interfacial sites.Consequently,the Cu/5CeO2/ZnO catalyst with maximal Cu-ZnO interfaces exhibited the highest H2 production rate of 94.6 mmolHi/(gcat·h),which was 1.5 and 10.2 times higher than those of Cu/ZnO and Cu/CeO2,respectively.
Methanol steam reformingCu/ZnO catalystCeO2 promoterMetal-support interactionInterfacial site
State Key Laboratory of Green Chemical Engineering and Industrial Catalysis,School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China
Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education,Zhengzhou University,Zhengzhou 450001,China
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