Catalytic oxidation of toluene over LaBO3 (B= Fe, Mn and Co) and LaCo0.7B′0.3O3 (B′= Fe and Mn) perovskite-type

In this paper, LaBO3 perovskite-type catalysts were prepared by sol-gel auto combustion method. Activity of catalysts was tested in catalytic oxidation of toluene. LaCoO3 showed the highest activity among LaBO3 perovskite catalysts. So, this catalyst was selected for further investigation. LaBO3 perovskite catalysts were modified by substitution of Co by Fe and Mn. The catalytic activity of LaCoO3 improved due to partial substitution of Co by B cations. LaCo0.7Mn0.3O3 showed the highest activity among the synthesized catalysts. The structures of synthesized perovskites were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis. The results of X-ray diffraction indicated that the LaBO3 and LaCo0.7B′0.3O3 samples obtained using sol-gel method had a pure perovskite-type crystal structure.