Abstract
Temperature-programmed desorption and IR spectroscopic studies of the physicochemical properties of cobalt, nickel, and manganese molybdates are reported. These properties are correlated with the catalytic properties of the molybdates in the oxidative dehydrogenation of isobutane with atmospheric oxygen. It is demonstrated by an analysis of the IR spectra of the molybdates that the isobutene yield grows as the proportion of tetrahedrally coordinated molybdenum in the catalyst structure increases in isobutane dehydrogenation. NiMoO4 has the highest surface concentration of strong acid sites, and it binds adsorbed isobutene more strongly than the other catalysts
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