Comparative study of CuO supported on CeO₂, Ce_0.8Zr_0.2O₂ and聽Ce_0.8Al_0.2O₂ based catalysts in the CO-PROX reaction

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• 作者：A. Arango-D铆az ; J.A. Cecilia ; E. Moretti ; A. Talon ; P. N煤帽ez ; J. Marrero-Jerez ; J. Jim茅nez-Jim茅nez ; A. Jim茅nez-L贸pez ; E. Rodr铆guez-Castell贸n
• 关键词：Nanocrystalline CeO2 ; Freeze-drying method ; Copper oxide ; Preferential CO oxidation ; Hydrogen
• 刊名：International Journal of Hydrogen Energy
• 出版年：6 March, 2014
• 年：2014
• 卷：39
• 期：8
• 页码：4102-4108
• 全文大小：1247 K

文摘

CuO supported on CeO_2, Ce_0.8Zr_0.2O₂ and Ce_0.8Al_0.2O₂ based catalysts (6%wt Cu) were synthesized and tested in the preferential oxidation of CO in a H₂-rich stream (CO-PROX). Nanocrystalline supports, CeO₂ and solid solutions of modified CeO₂ with zirconium and aluminum were prepared by a freeze-drying method. CuO was supported by incipient wetness impregnation and calcination at 400聽掳C. All catalysts exhibit high activity in the CO-PROX reaction and selectivity to CO₂ at low reaction temperature, being the catalyst supported on CeO₂ the more active and stable. The influence of the presence of CO₂ and H₂O was also studied.