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Selective hydroxylation of benzene using dioxygen activated by vanadium–copper oxide catalysts supported on SBA-15

Paper ID Volume ID Publish Year Pages File Format Full-Text
43543 45976 2007 6 PDF Available
Title
Selective hydroxylation of benzene using dioxygen activated by vanadium–copper oxide catalysts supported on SBA-15
Abstract

The vanadium and copper oxide species supported catalyst, VOx/CuSBA-15, was synthesized to catalyze the hydroxylation reaction of benzene to form phenol using molecular dioxygen in the presence of ascorbic acid. A high yield of phenol was achieved at ca. 27% with the selectivity of nearly 100%. The VOx/CuSBA-15 has two characteristics that it can selectively activate dioxygen molecules rather than H2O2, and it can selectively catalyze benzene hydroxylation to form phenol, but can hardly catalyze phenol for further oxidation under the same reaction conditions. Both copper and vanadium oxide species supported on a mesoporous silicate has a prominent catalytic performance toward the benzene hydroxylation reaction comparing to the other bi-transition metal oxides or monometallic catalysts on the same support. The results suggest that there might be a synergy between copper and vanadium oxide species on the support. It is believed that benzene hydroxylation over the VOx/CuSBA-15 catalyst occurs through the hydroxyl radical pathway, and the catalytic activation of molecular oxygen to form hydroxyl radical would be a rate determining step.

Graphical abstractPhenol was synthesized through directly hydroxylation reaction of benzene over VOx/CuSBA-15 catalyst using molecular dioxygen as an oxidant in the presence of ascorbic acid. A high yield of phenol was achieved at ca. 27% with the selectivity of nearly 100%. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Benzene; Phenol; Hydroxylation; Oxidation; Vanadium oxide; Copper oxide; SBA-15
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Selective hydroxylation of benzene using dioxygen activated by vanadium–copper oxide catalysts supported on SBA-15
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 328, Issue 2, 10 September 2007, Pages 150–155
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us