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Mo-V-P-O y /Al 2 O 3 (denoted as 18.1Mo1.9VXP/Al: 18.1 wt% Mo, 1.9 wt% V, X wt% P) catalysts with different phosphorus content were prepared by an impregnation method, and they were applied to the acrylonitrile production by ammoxidation of propane. The effect of phosphorus content on the physicochemical properties and catalytic activities was investigated. Conversion of propane and yield for acrylonitrile showed volcano-shaped trends with respect to phosphorus content. Yield for acrylonitrile increased with decreasing binding energy of Mo 3d 5/2 . Among the catalysts, 18.1Mo1.9V0.6P/Al with the smallest binding energy of Mo 3d 5/2 showed the best catalytic performance in the ammoxidation of propane to acrylonitrile.

Mono-transition metal (Mo, V, and Nb)-substituted Wells–Dawson tungstoarsenates were investigated to elucidate the effect of metal-substitution on their redox behaviors. In the electrochemical analysis, an additional redox transition was observed for molybdenum- and vanadium-substituted tungstoarsenates, while a negatively shifted redox transition was observed for niobium-substituted tungstoarsenate. First electron reduction potential of the catalysts showed the consistent trend with UV–visible absorption edge energy of the catalysts. Oxidative dehydrogenation of benzylamine to dibenzylimine was carried out as a model reaction to probe oxidation catalysis. Yield for dibenzylimine increased with increasing first electron reduction potential and with decreasing UV–visible absorption edge energy.

A series of Pt/Sn/M/γ-Al2O3 catalysts with different third metal (M = Zn, In, Y, Bi, and Ga) were prepared by a sequential impregnation method for use in the direct dehydrogenation of n-butane to n-butene and 1,3-butadiene. In the direct dehydrogenation of n-butane, Pt/Sn/Zn/γ-Al2O3 catalyst showed the best catalytic performance. Catalytic performance decreased in the order of Pt/Sn/Zn/γ-Al2O3 > Pt/Sn/In/γ-Al2O3 > Pt/Sn/γ-Al2O3 > Pt/Sn/Y/γ-Al2O3 > Pt/Sn/Bi/γ-Al2O3 > Pt/Sn/Ga/γ-Al2O3. The catalytic performance increased with increasing metal–support interaction and Pt surface area of the catalyst.