Preferential CO oxidation over catalysts with well-defined inverse opal structure in microchannels

Catalyst supports of CeO2/SiO2 and Al2O3 with three-dimensionally ordered macroporous structure were fabricated in microchannels by application of PMMA opals as templates. Pt-Rh supported on CeO2/SiO2 showed high efficiency for CO removal in preferential CO oxidation in the presence of excess hydrogen. Pt-Rh supported on Al2O3 with an inverse opal structure showed higher reactivity than that supported on wash-coated Al2O3 layers in microchannel reactor. (C) 2007 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.