The Oxygen Mobility and Catalytic Activity of LaMO 3±δ (M=Cr, Mn, Co) Phases

The activity of LaMO3, where M=Cr, Mn, Co, perovskite-type complex oxides in oxygen diffusion and catalytic processes was investigated. For sample preparation freeze-drying technique was used and dynamic thermal isotope exchange method was used to study exchange reaction between 18O from the gas phase and 16O from the samples synthesized, and to investigate the methane catalytic oxidation reaction. The results obtained allowed to indicate temperature intervals of different types of reaction taking place and that LaCrO3 is far less active in mentioned reactions than LaCoO3 and LaMnO3.