ABSTRACT Mixed oxides of transition metals have gained significant attention due to their remarkable catalytic properties in various chemical reactions. Among these materials, perovskite-type oxides with the general formula LnMO? (where Ln = lanthanide element and M = transition metal) exhibit excellent catalytic activity, structural stability, and tunable electronic properties. These oxides have been widely studied for applications in oxidation reactions, fuel cells, environmental catalysis, and energy conversion processes. The catalytic behavior of LnMO? materials depends on factors such as the nature of the transition metal at the B-site, oxygen vacancies, redox properties, and structural distortions. In this study, the catalytic properties of mixed transition metal oxides with emphasis on LnMO? perovskites are reviewed and analyzed. Comparative catalytic performance, structural parameters, and reaction mechanisms are discussed using representative examples such as LaCoO?, LaMnO?, LaFeO?, and LaNiO?. The study highlights the importance of B-site cation selection and oxygen mobility in determining catalytic activity. The results demonstrate that LnMO? perovskites represent promising alternatives to noble metal catalysts due to their cost-effectiveness, thermal stability, and high catalytic efficiency.
