Study of CuO/CeO₂ catalyst with for preferential CO oxidation reaction in hydrogen-rich feed (PROX-CO)

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• 作者：Cristhiane Guimarã ; es Maciel^a ; ¹ ; ^{mansur@ufscar.br} ; Tatiana de Freitas Silva^a ; ¹ ; Luciene Paula Roberto Profeti^b ; Elisabete Moreira Assaf^c ; ² ; José ; Mansur Assaf^a ; ¹
• 关键词：CuO/CeO2 ; Preparation method ; Redox properties ; XANES
• 刊名：Applied Catalysis A ; General
• 出版年：2012
• 期刊代码：4_0926860x
• 类别：ch
• 出版时间：26 July, 2012
• 卷：431-432
• 期：Complete
• 页码：25-32
• 文件大小：884 K

摘要

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.