Journal
CATALYSIS COMMUNICATIONS
Volume 10, Issue 10, Pages 1432-1436Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2009.03.010
Keywords
Macro-porous; 3DOM; Preferential oxidation; Hydrogen; Diffusion; Pore structure
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Three-dimensionally ordered macro-porous (3DOM) CuO-CeO2 was prepared by using polystyrene (PS) colloidal crystal as the template, nitrate as the precursor and citric acid as the chelator. For CO preferential oxidation (PROX), at a higher space velocity of 160,000 mL g(cat) (1) h (1), complete CO conversion has been obtained between 150 degrees C and 175 degrees C. As the macro-pores of 3DOM are destroyed, complete CO conversion cannot be obtained even at a lower space velocity of 80,000 mL g(cat) (1) h (1), and likewise over particulate CuO-CeO2 catalysts. It is proposed that the ordered macro-pores in the 3DOM catalyst favor mass transfer, resulting in the excellent catalytic performance. (C) 2009 Elsevier B.V. All rights reserved.
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