Oxidation of CO and hydrocarbons over perovskite-type complex oxides

Article abstract of DOI:10.1007/BF02496248

The catalytic activity of perovskites M^IM^IIO³ (M^I = La; M^II = Co, Mn, Cr, Al, Ni, and V) and M^ICoO₃ (M = Y, Nd, Sm, and Er) in the oxidation of CO, propylene, and ethylbenzene was investigated. The highest activity was observed for the M^ICoO₃ catalysts with perfect perovskite structure. The nature of the rare-earth element has no influence on the catalytic activity. Deformation of the octahedral coordination of the metal was found for the less active catalysts. The interaction of gases (CO, CO+air) with the catalyst surface was investigated. The more active catalysts adsorb a greater amount of O₂, and the adsorption occurs in the temperature region of the oxidation reaction. The activities of the perovskite-and spinel-type catalysts were compared under similar conditions.