CATALYTIC ACTIVITY OF MoO3 AND V2O5 HIGHLY DISPERSED ON TiO2 FOR OXIDATION REACTIONS.

Article abstract of DOI:10.1246/bcsj.57.1205

The structure of Mo-Ti oxide catalysts has been investigated by using IR and XRD techniques. At a low Mo content, MoO//3 is highly dispered on TiO//2, an amorphous phase being formed. Simultaneously, a shift of the Mo equals O band from 995 cm** minus **1 to 950 cm** minus **1 takes place. The maximum rate of the oxidation of C//2H//5OH and C//3H//6 over Mo-Ti-6(atom% of Mo) is attributable to the weakening of the Mo equals O bond. The **1**8O tracer and kinetic studies of the oxidation of C//3H//6 over Mo-Ti and V-Ti oxides suggest that a redox mechanism is applicable, the rate constants of reduction and reoxidation step being determined. The promoter action of TiO//2 support is attributed mainly to the increase in the rate of reduction step.