ValenceStateofActiveCopperinCuOx/CeO2CatalystsforCOOxidation

被引：0

作者：

曾尚红 ^{[1
]}

白雪 ^{[2
]}

王晓燕 ^{[2
]}

于文国 ^{[2
]}

刘源 ^{[1
]}

机构：

[1] Department of Catalysis Sciences and Technology, College of Chemical Engineering, Tianjin University, Tianjin , China

[2] School of Chemical Engineering, Inner Mongolia University of Technology, Huhhot , China

来源：

Journal of Rare Earths | 2006年 / 02期

关键词：

active center; carbon monoxide; ceria; copper; preferential oxidation; hydrogen production; rare earths;

D O I：

暂无

中图分类号：

O643.32 [催化反应];

学科分类号：

081705 ;

摘要：

CuOx/CeO2 catalysts were prepared by adsorption-impregnation method. CO conversion was tested over the catalysts pretreated under different conditions for preferential CO oxidation in H2, and the catalysts were characterized with X-ray photoelectron spectroscopy and temperature programmed reduction. Experimental results show that there are two kinds of copper, which are Cu+ and Cu 2+ in calcined CuOx/CeO2. Among them, the Cu+ is the key active component for CO oxidation. The main reason is as follows: CO is activated by copper for CO oxidation over CuOx/CeO2, while CO can not be activated by Cu 2+ . Only when Cu 2+ is reduced to Cu+ or Cu0, the copper may be active for CO oxidation, moreover, the experimental results show that the reduction of Cu 2+ does not lead to an increase of catalytic activity. So the active species is Cu+ in CuOx/CeO2 catalysts.

引用

页码：177 / 181

页数：5

共 4 条

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