Journal
CATALYSIS LETTERS
Volume 111, Issue 3-4, Pages 203-205Publisher
SPRINGER
DOI: 10.1007/s10562-006-0148-1
Keywords
activation of oxygen; active vanadium species; selective oxidation; benzene; phenol
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The activation of oxygen is a key step for the selective oxidation of benzene to phenol and the reason is discussed. The active oxygen species is produced from molecular oxygen in a so-called reductive activation process. The vanadium oxide supported on alumina was pre-reduced by hydrogen or ascorbic acid to lower valence vanadium species acting as reduction source and the activity is investigated in the reaction. It is found that the V4+ valence vanadium (VO2+) is effective for the reaction from the characterization of catalysts by XPS.
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