Catalytic purification of hydrogen streams by PROX on Cu supported on an organized mesoporous ceria-modified alumina

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• 作者：E. Moretti ; M. Lenarda ; L. Storaro ; A. Talon ; R. Frattini ; S. Polizzi ; E. Rodrí ; guez-Castelló ; n ; A. Jimé ; nez-Ló ; pez
• 关键词：Preferential CO oxidation ; Hydrogen ; PEM fuel cell ; Cerium oxide ; Copper ; Organized mesoporous alumina
• 刊名：Applied Catalysis B ; Environmental
• 出版年：2007
• 期刊代码：4_09263373
• 类别：ce
• 出版时间：8 March 2007
• 卷：72
• 期：1-2
• 页码：149-156
• 文件大小：520 K

摘要

In view of the stringent CO intolerance of the proton-exchange membrane fuel cells (PEMFCs), it is essential to eliminate even trace amounts of carbon monoxide from the reformate streams. The preferential oxidation (PROX) is considered to be a promising method for CO cleaning up. Catalytic systems, based on copper supported on ceria-modified organized mesoporous alumina, were investigated for the PROX of CO in hydrogen-rich gas stream. The catalysts showed an interesting activity in the CO-PROX. The sample with the best catalytic performance was characterized by N₂ adsorption–desorption, X-ray photoelectron spectroscopy (XPS), X-ray powder diffraction (XRPD), high-resolution transmission electron microscopy (HRTEM), temperature-programmed reduction by H₂ (H₂-TPR), and successive re-oxidation (TPO).