期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 79, 期 1-2, 页码 26-34出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2007.10.005
关键词
CuO-Fe2O3 catalyst; mesoporous; CO oxidation; catalytic activity
A series of mesoporous CuO-Fe2O3 composite oxide catalysts with different CuO contents were prepared by a surfactant-assisted method of nanoparticle assembly. The prepared composite oxides were characterized by X-ray diffraction, N-2 adsorption, transmission electron microscopy, hydrogen temperature-programmed reduction, thermogravimetry-differential thermal analysis and X-ray photoelectron spectroscopy. Their catalytic behavior for low-temperature CO oxidation was studied by using a microreactor-GC system. These mesoporous CuO-Fe2O3 catalysts possess a wormhole-like mesostructure with a narrow pore size distribution and high surface area, exhibiting high catalytic activity and stability for low-temperature CO oxidation. The catalytic behavior depended on the CuO content, the precalcination temperature, the surface area and the particle size of the catalysts. The catalyst with 15 mol% CuO content and calcined at 300 degrees C exhibited the highest catalytic activity and stability. (C) 2007 Elsevier B.V. All rights reserved.
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