Dispersion, reduction and catalytic properties of copper oxide supported on Ce0.5Zr0.5O2 solid solution

被引：60

作者：

Chen, Hongliang

Zhu, Haiyang

Wu, Yong

Gao, Fei

Dong, Lin ^{[1
]}

Zhu, Junjie

机构：

[1] Nanjing Univ, Key Lab Mesoscop Chem, MOE, Sch Chem & Chem Engn, Nanjing 210093, Peoples R China

[2] Nanjing Normal Univ, Dept Chem, Nanjing 210097, Peoples R China

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2006年 / 255卷 / 1-2期

基金：

中国国家自然科学基金; 高等学校博士学科点专项科研基金;

关键词：

copper oxide; microwave; dispersion capacity; ceria-zirconia; solid solution;

D O I：

10.1016/j.molcata.2006.04.015

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：

Ce0.5Zr0.5O2 solid solution was synthesized by a microwave method and used as support for preparing a series of CuO/Ce0.5Zr0.5O2 catalysts. The samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) and temperature-programmed reduction (TPR), and the results indicated that: (1) the dispersion capacity of copper oxide on Ce0.5Zr0.5O2 is about 0.70 mmolCuO/100m(2)Ce(0.5)Zr(0.5)O(2); (2) there are two kinds of copper species in the catalysts, i.e., dispersed and crystalline copper species. The catalytic activities of CuO/Ce0.5Zr0.5O2 for the low temperature (100 and 125 degrees C) CO oxidation were also tested, which showed that the sample with CuO loading amount of 1.2 mmolCuO/100m(2)Ce(0.5)Zr(0.5)O(2) presented the highest activity. Combined with the XRD and TPR results, it seems to suggest that the main active species in this system should be the surface and/or small particle copper oxide species. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：254 / 259

页数：6

共 38 条

[1] Investigation of Pt/γ-Al2O3 catalysts with locally high Pt concentrations for oxidation of CO at low temperatures [J].