Pt-containing perovskite-type oxides used for catalytic methane combustion

A series of catalysts La_0.95Ce_0.05CoO₃, La_0.95Ce_0.05Co_0.95Pt_0.05O₃ and Pt/La_0.95Ce_0.05CoO₃ were prepared by combustion method and impregnation method, respectively. The purpose of the present work was to study the effect of platinum, with the same loading, on the platinum-substituted perovskite and perovskite-supported platinum catalyst. The catalysts structure were characterized by X-ray diffraction (XRD), BET measurements, transmission electron micrographs (TEM) and the methane oxidation activity of the catalysts were investigated in detail. It was found that the catalytic activity of La_0.95Ce_0.05Co_0.95Pt_0.05O₃ was superior to that of La_0.95Ce_0.05CoO₃ and the activity performance of Pt/La_0.95Ce_0.05CoO₃ was higher than that of La_0.95Ce_0.05Co_0.95Pt_0.05O₃ for methane combustion.