Methanol Oxidation Reaction Kinetics and Influence of the Oxide Support

4 Methanol Oxidation Reaction Kinetics and Influence of the Oxide Support 

TPRS experiments for this reaction step. The two hydrogens released in the methanol adsorption and the surface methoxy decomposition steps are eventually converted to water. Spectroscopic details about the formation of water are presently not available, but the formation of water most likely proceeds via the condensation of two surface hydroxyl groups. The reduced surface vanadia site is readily reoxidized back to vanadium (+5) by gas phase oxygen as shown by in situ Raman measurements.42 

The apparent activation energies for methanol oxidation over the series of support vanadia catalysts is a composite of the activation energy and the heats of adsorption  

Fundamental TPRS studies have shown that the activation energy for breaking the C-H bond of methoxy is approximately 23 kcal/mol.39 The similar apparent activation energies for methanol oxidation over all the supported vanadia catalysts,29 19-23 kcal/mol, suggests that the apparent heats of adsorption, 

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