An Investigation of Catalytic Activity for CO Oxidation of CuO/Ce x Zr1–x O2 Catalysts

A series of CuO/CexZr1–xO2 catalyst powders with different Ce/Zr ratio were prepared via an impregnation method and characterized by X-ray diffraction (XRD), Fourier transform Raman (FT-Raman), H2-Temperature-programmed reduction (TPR) and X-ray photoelectron spectra techniques. The catalytic proper...

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Bibliographic Details
Published in:Catalysis letters 2008-02, Vol.121 (1-2), p.70-76
Main Authors: Wang, Shu-Ping, Zhang, Tong-Ying, Su, Yan, Wang, Shu-Rong, Zhang, Shou-Min, Zhu, Bao-Lin, Wu, Shi-Hua
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Catalytic activity
Dispersion
Fourier transforms
Oxidation
Photoelectrons
Reduction
X-ray diffraction
Zirconium
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Summary:A series of CuO/CexZr1–xO2 catalyst powders with different Ce/Zr ratio were prepared via an impregnation method and characterized by X-ray diffraction (XRD), Fourier transform Raman (FT-Raman), H2-Temperature-programmed reduction (TPR) and X-ray photoelectron spectra techniques. The catalytic properties of the catalysts were evaluated by means of a microreactor-GC system. XRD results showed that the addition of CuO had no effect on the crystalline lattice of the support. The structures of the CexZr1–xO2 samples were confirmed by XRD analyses and FT-Raman results. The H2-TPR profiles for these catalysts had three peaks, which could be attributed to the reduction of three kinds of CuO species, i.e., the highly dispersed CuO, the larger CuO species and the bulk CuO. The TPR analyses and catalytic property tests indicated that the Ce/Zr ratio of CuO/CexZr1–xO2 had an effect on the dispersion degree of CuO and the catalytic activity of the catalysts.
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-007-9294-3