On the involvement of radical oxygen species O − in catalytic oxidation of benzene to phenol by nitrous oxide

Catalytic oxidation of benzene to phenol by nitrous oxide over Fe-MFI zeolites was studied in relation to the active oxygen species taking part in the oxidation. A linear dependence of the reaction rate on the concentration of independently identified active sites generating O − radicals ( α sites)...

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Bibliographic Details
Published in:Journal of catalysis 2007-01, Vol.245 (2), p.466-469
Main Authors: Chernyavsky, Valery S., Pirutko, Larisa V., Uriarte, Anthony K., Kharitonov, Alexander S., Panov, Gennady I.
Format: Article
Language:English
Subjects:
Analytical chemistry
Benzene to phenol oxidation
Catalysis
Fe-MFI
Hydrocarbons
N 2O
Oxidation
Oxygen radicals
Selective oxidation
α-Oxygen
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Summary:Catalytic oxidation of benzene to phenol by nitrous oxide over Fe-MFI zeolites was studied in relation to the active oxygen species taking part in the oxidation. A linear dependence of the reaction rate on the concentration of independently identified active sites generating O − radicals ( α sites) was obtained within a broad range of values. The dependence is interpreted as convincing evidence of the O − involvement in the catalytic (not only stoichiometric) oxidation of benzene to phenol. This conclusion is of particular importance in connection with a long discussion in the literature on a possible role of O − radicals in selective oxidation catalysis over V and Mo oxides. Reliable evidence of the catalytic role of O − obtained with zeolites may renew general interest in the once-suggested but not recognized role of radical oxygen in oxidation over widely used metal oxide catalysts.
ISSN:0021-9517
1090-2694
DOI:10.1016/j.jcat.2006.10.023