Variability in the structure of supported MoO3 catalysts: studies using Raman and X-ray absorption spectroscopy with ab initio calculations

Article Abstract:

The structure of Mo centers in supported molybdenum oxide catalysts are characterized by using Raman, extended X-ray absorption fine structure spectroscopy (EXAFS), and near-edge X-ray absorption fine structure (NEXAFS) spectroscopies. The structure of a series of silica-, alumina-, and titania-supported catalysis by a variety of techniques is studied and the results are compared to predictions from theoretical calculations.

Usage, X-ray spectroscopy, Raman spectroscopy

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Control of reactivity in C-H bond breaking reactions on oxide catalysts: Methanol oxidation on supported molybdenum oxide

Article Abstract:

The oxidation of organic substances on metal oxide catalysts could be viewed as entailing a transfer of electrons from the organic moeity to the catalytic center, and is expected to involve the electron-accepting levels in the metal center. It is shown that the activity of a series of catalysts duly correlates with the unoccupied density of electronic states of the parent metal oxides.

Science & research, All Other Basic Organic Chemical Manufacturing, Methanol, Research, Oxidation-reduction reaction, Oxidation-reduction reactions, Oxides, Chemical bonds

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Direct observation of surface intermediates formed by selective oxidation of alcohols on silica-supported molybdenum oxide

Article Abstract:

The activities of surface types formed from the adhesion of alcohols on MoO(sub 3) and SiO(sub 2) were examined. The dynamic studies suggested that the rate-ascertaining step for the alcohol oxidation was the splitting of the alpha-C-H bond in the alkoxide intermediates.

Analysis, Hydrogen bonding, Hydrogen bonds

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