PM oxidation over Ag-loaded perovskite-type oxide catalyst prepared by thermal decomposition of heteronuclear cyano-complex precursor

Abstract The Ag-loaded perovskite-type oxide catalysts (Ag/LaFeO 3 -CN and Ag/LaFeO 3 -imp) were prepared using two different methods, and their catalytic activities for carbon combustion were examined. Ag loading was observed to exhibit a positive effect on the catalytic activity of carbon combustion for an Ag/LaFeO 3 -CN catalyst that was prepared by the calcination of an Ag-loaded heteronuclear metal cyano-complex precursor. However, Ag loading was not observed to be significantly effective in case of Ag/LaFeO 3 -imp that was prepared by a general impregnation method. Such a noticeable enhancement in the activity of an Ag/LaFeO 3 -CN catalyst was assumed to originate from both the high dispersion of Ag that was loaded on LaFeO 3 and from the formation of reactive oxygen species between metallic Ag species and the perovskite-type oxide.