The preparation and catalytic behavior of copper-cerium oxide catalysts for low-temperature carbon monoxide oxidation

被引：111
|
作者：
Zheng, XC [1 ]
Wu, SH [1 ]
Wang, SP [1 ]
Wang, SR [1 ]
Zhang, SM [1 ]
Huang, WP [1 ]
机构：
[1] Nankai Univ, Dept Chem, Tianjin 300071, Peoples R China
来源：
APPLIED CATALYSIS A-GENERAL | 2005年 / 283卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
sol-gel method; CeO2; CuO/CeO2; carbon monoxide oxidation;
D O I：
10.1016/j.apcata.2005.01.007
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
引用
收藏
页码：217 / 223
页数：7
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