Reaction Kinetics and Catalysis Letters, Vol.79, No.1, 135-141, 2003
Pretreatment-induced redox processes in molybdena-alumina metathesis catalysts
The ESR investigation of MoO3/Al2O3 metathesis catalysts was carried out and the results interpreted in relation to the previous XPS study [1]. The increase of the Mo(V) signal upon treatment with argon was attributed to the oxidation of ESR-silent Mo(IV) centers. The enhancement of Mo(V) signal upon exposure to propene at 303 K was assigned to the reduction of Mo(VI).