Inverse rod-like CeO₂ supported on CuO prepared by hydrothermal method for preferential oxidation of carbon monoxide

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• 作者：Shanghong Zeng ; Wenli Zhang ; Suilin Guo ; Haiquan Su ; ^{haiquansu@yahoo.com}
• 关键词：CeO2/CuO ; Rod ; Particle ; Hydrogen ; CO-PROX
• 刊名：Catalysis Communications
• 出版年：2012
• 期刊代码：12_15667367
• 类别：ce
• 出版时间：5 June, 2012
• 卷：23
• 期：Complete
• 页码：62-66
• 文件大小：1327 K

摘要

The CeO₂/CuO catalysts were synthesized by the hydrothermal method and characterized via XRD, BET, SEM, H₂-TPR, XPS and HRTEM techniques. The results showed that CeO₂ with two kinds of morphologies (particle and rod-like CeO₂) was highly dispersed on the surface of the catalysts when Ce/Cu molar ratio exceeded 0.25. The rod-like CeO₂ exposed more (1 1 1) planes, and this was helpful for oxygen storage and transportation. Moreover, the contact interface between highly dispersed CuO and bulk ceria supplied the active sites not only for CO oxidation but also for H₂ oxidation, but the contact interface of highly dispersed ceria and bulk CuO was more favorable for CO oxidation than H₂ oxidation.