Effect of nature of ceria support in CuO/CeO₂ catalyst for PROX-CO reaction

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• 作者：Cristhiane Guimarã ; es Maciel^a ; ^{mansur@ufscar.br} ; Tatiana de Freitas Silva^a ; Marcelo Iuki Hirooka^a ; Mohamed Naceur Belgacem^b ; Jose Mansur Assaf^a
• 关键词：Ceria ; Hydrothermal ; Precipitation
• 刊名：Fuel
• 出版年：2012
• 期刊代码：33_00162361
• 类别：ce
• 出版时间：July, 2012
• 卷：97
• 期：Complete
• 页码：245-252
• 文件大小：1057 K

摘要

In order to understand the effect of CeO₂ on the preferential CO oxidation reaction (PROX-CO), the support cerium oxide was prepared by hydrothermal (CeO₂-HT) and precipitation (CeO₂-PP) methods. The catalyst supported on CeO₂-HT exhibited higher activity than CuO/CeO₂-PP. Characterization revealed that CuO was better dispersed on the CuO/CeO₂-HT surface favoring the PROX-CO reaction, compared to CuO/CeO₂-PP. Also, the nature of ceria was important for enhancing the metal-support interaction, which affects the catalytic activity. The CuO/CeO₂-HT catalyst was less sensitive to presence of CO₂ and H₂O, remaining stable in a 24 h run.