کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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40788 | 45866 | 2012 | 8 صفحه PDF | دانلود رایگان |
The CuO/CeO2 system was investigated as a catalyst for preferential CO oxidation reaction in hydrogen-rich feed (PROX-CO). The catalysts were prepared by deposition–precipitation (DEP) and co-precipitation (COP) methods and the catalytic performance reveals that the preparation method influences the properties of solids prepared, where a direct consequence is the difference in behavior of the catalysts in the PROX-CO reaction. A high specific area and a better dispersion of the metallic phase were obtained in the catalyst prepared by co-precipitation. The redox properties during the reaction were reported by measures of temperature programmed reduction (TPR), OSC measurements and X-ray absorption near edge structure (XANES-TPR) in situ showed the relationship between the preparation method, the physico-chemical characteristics and redox properties in the PROX-CO reaction. By this means, the good dispersion of CuO and the best oxygen capacity are the response of the high performance of CuO/CeO2-COP catalysts for the PROX-CO reaction.
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► CuO/CeO2 catalysts for PROX-CO.
► Redox properties were studied by H2-TPR-XANES and PROX-CO-XANES.
► Catalysts prepared by hydrothermal methods showed better performance.
► Lower temperatures are favorable for PROX-CO performance.
Journal: Applied Catalysis A: General - Volumes 431–432, 26 July 2012, Pages 25–32