Abstract

Four V/γ-Al 2 O 3 catalysts with coverages ranging from 1.4 to 8.2 V atoms/nm 2 were examined with heat flow microcalorimetry, Raman spectroscopy, and chemical titration. Raman spectra showed that crystalline V 2 O 5 formed on the Al 2 O 3 surface between coverages of 6.1 and 8.2 V/nm 2 . The heats and rates of reoxidationof the reduced catalysts were measured in a static adsorption calorimetry system. Both the reoxidation rates and heats were strong functions of the degree of reduction

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