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Influence of preparation method on the catalytic activities of CuO/Ce0.67Zr0.33O2 catalysts in CO + O2 reaction

Paper ID Volume ID Publish Year Pages File Format Full-Text
47390 46470 2010 9 PDF Available
Title
Influence of preparation method on the catalytic activities of CuO/Ce0.67Zr0.33O2 catalysts in CO + O2 reaction
Abstract

Ce0.67Zr0.33O2 solid solutions synthesized by traditional co-precipitation method (hereafter donated as CZ-CP) and hydrothermal method (hereafter donated as CZ-HT) were used as supports for preparing a series of CuO/Ce0.67Zr0.33O2 catalysts. High resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), temperature-programmed reduction (TPR), CO adsorption in situ Fourier transform infrared spectroscopy (CO in situ FT-IR) and the activity of CO oxidation model reaction at low temperature (<200 °C) were used to approach the properties of the catalysts. The results showed that the Ce0.67Zr0.33O2 prepared by hydrothermal method facilitate the formation and stabilization of Cu+ on the surface of support and thus the activity for CO + O2 reaction was improved. A tentative model was suggested that the difference in the preferentially exposed plane of CZ-CP and CZ-HT leads to the great difference in dispersion, reduction and reaction activity of the dispersed copper oxide species on these two supports.

Keywords
CeO2–ZrO2 solid solution; Hydrothermal method; Preferentially exposed plane; “Incorporation Model”
First Page Preview
Influence of preparation method on the catalytic activities of CuO/Ce0.67Zr0.33O2 catalysts in CO + O2 reaction
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 96, Issues 3–4, 7 June 2010, Pages 449–457
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis