کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
63088 | 47670 | 2007 | 4 صفحه PDF | دانلود رایگان |
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.
Journal: Journal of Catalysis - Volume 245, Issue 2, 25 January 2007, Pages 466–469