Reaction Kinetics and Catalysis Letters, Vol.93, No.1, 43-49, 2008
Correlation between reduction potential of vanadium-containing heteropolyacid (HPA) catalysts and their oxidation activity for cyclohexanol dehydrogenation
Vanadium-containing H6+xP2Mo18-xVxO62 (X = 0, 1, 2 and 3) Wells-Dawson heteropolyacid (HPA) and H3+xPMo12-xVxO40 (X = 0, 1, 2 and 3) Keggin HPA catalysts were applied to the vapor-phase dehydrogenation of cyclohexanol. The catalytic oxidation activity showed a volcano-shaped curve with respect to vanadium substitution for both families of HPA catalysts. The Wells-Dawson HPA showed a better catalytic oxidation performance than the Keggin HPA at the same level of vanadium substitution.