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

作者：Chen Hongliang; Zhu Haiyang; Wu Yong; Gao Fei; Dong Lin^*; Zhu Junjie

来源：Journal of Molecular Catalysis A: Chemical , 2006, 255(1-2): 254-259.

DOI：10.1016/j.molcata.2006.04.015

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

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.

• 出版日期2006-8-1
• 单位南京大学; 南京师范大学