Catalytic properties of metal loaded silica-pillared manganese titanate for CO oxidation Original Research Article

Semiconducting microporous solids were prepared by pillaring layer structured manganese titanate, RbxMnxTi2−xO4 (x=0.75) with silica. These solids were then chemically modified by loading various kinds of metals by cation exchange and impregnation methods. The samples with copper loaded by the impregnation method showed a high catalytic activity for the oxidation of carbon monoxide with oxygen. The highest activity was obtained for the sample with the copper content, [Cu]/[Cu+Mn]≈0.3; the CO conversion of more than 90% was achieved at 60°C. The high catalytic activity is attributed to the microporous pillared structure with a high porosity and the charge transfer between copper and the manganese titanate layers.