Journal
CATALYSIS TODAY
Volume 112, Issue 1-4, Pages 103-106Publisher
ELSEVIER
DOI: 10.1016/j.cattod.2005.11.032
Keywords
SBA-15; nitrous oxide; epoxidation; hydroxylation; iron
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The vapour phase hydroxylation of toluene and epoxidation of propene and 1-butene with nitrous oxide over Fe/SBA-15 catalysts was experimentally investigated. Modification of these mesoporous catalysts by the addition of KCl resulted in a significant transfer from benzylic/allylic oxidation towards aromatic/vinylic oxidation by suppressing the reactivity of nucleophilic oxygen species. Analogous to the Fe/ZSM-5 system, highly dispersed iron species residing within the pore structure are responsible for generating the electrophilic oxygen species upon nitrous oxide decomposition. While substrate conversions are generally low (< 4%), the catalysts offer phenolic/epoxide selectivities of similar to 70% in an environmentally benign one-step reaction. (c) 2005 Elsevier B.V. All rights reserved.
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