| 초록 |
Catalytic oxidation of CO has been studied extensively because of its great importance for both practical applications and fundamental research of catalysis sciences. In this study, highly ordered mesoporous cerium dioxide (meso-CeO2) was successfully synthesized using a facile solvent-free infiltration method from a mesoporous silica template, KIT-6. The physicochemical properties of meso-CeO2 material and Pd-supported on meso-CeO2 (Pd/meso-CeO2) were characterized by electron microscopy, X-ray diffraction, N2 adsorption-desorption, CO-temperature programmed desorption, H2-temperature programmed reduction and O2-temperature programmed oxidation. The catalytic activity of the Pd/meso-CeO2 catalyst for CO oxidation was compared to those of Pd/CeO2 catalysts which were prepared by using nanocrystalline CeO2 (nano-CeO2) and bulk-CeO2 as the supports. And nano- and bulk-CeO2 and Pd-CeO2 materials were investigated using H2-temperature programmed reduction, O2-temperature programmed oxidation and CO-temperature programmed desorption to support the enhanced activities for low temperature CO oxidation. |
