Synergy in the SnMoO catalysts: The selective oxidation of methanol Original Research Article

This work deals with the performance of mechanical mixtures of SnO2 and MoO3 (prepared separately) in the selective oxidation of methanol. Synergetic cooperations occur between these phases in the oxidation of methanol. The catalysts are investigated by different techniques (XRD, XPS, SSA, DTA, Redox cycles and EPR) in order to explain the catalytic behavior. Catalytic activities of artificially contaminated phases by impregnation are also measured. Methanol conversion and selectivity to methyl formiate are closely related to the increase in the redox capacity of the catalyst and to the appearance of Mo5+ ions. The synergy in the catalytic activity might be accounted by the creation of new active sites.