期刊
APPLIED CATALYSIS A-GENERAL
卷 283, 期 1-2, 页码 217-223出版社
ELSEVIER
DOI: 10.1016/j.apcata.2005.01.007
关键词
sol-gel method; CeO2; CuO/CeO2; carbon monoxide oxidation
CeO2 nano-crystals were synthesized by a sol-gel process and then used as support for CuO/CeO2 (sol-gel) catalysts prepared via impregnation method. For comparison, the commercial CeO2 was also used as a support for CuO/CeO2 (commercial) catalysts prepared via the same method. The samples were characterized by means of BET, XRD, UV-vis, TPR and XPS. The catalytic properties of the CuO/CeO2 catalysts for low-temperature CO oxidation were studied by using a microreactor-GC system. The prepared spherical CeO2 nano-crystals have much smaller particle size, better crystallinity and larger surface area than the commercial CeO2, XPS analysis indicated the presence of reduced copper species in the CuO/CeO2 catalysts. TPR showed that there are different copper species in the catalysts. The influence of calcination time, temperature and CuO loadings on the catalytic activity of CuO/CeO2 catalysts has been studied. The CuO/CeO2 (sol-gel) catalysts exhibited higher catalytic activity than the CuO/CeO2 (commercial) catalysts. Compared with CuO/CeO2 catalysts prepared via other techniques, our catalysts exhibited similar or even better catalytic performance. (c) 2005 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据