Title: On the role of aluminum in the selective oxidation of benzene to phenol by nitrous oxide over iron-containing MFI zeolites: an in situ Fe XANES study
Authors: Hensen, Emiel ×
Zhu, QJ
Liu, PH
Chao, KJ
van Santen, R #
Issue Date: 2004
Publisher: Academic press inc elsevier science
Series Title: Journal of catalysis vol:226 issue:2 pages:466-470
Abstract: In situ Fe K-edge XANES experiments point to a distinct difference in reducibility of iron in Fe-silicalite (without aluminum) and FeZSM-5 (with aluminum) upon dehydration. Whereas a noticeable part of Fe3+ is reduced to ferrous ions in the iron-containing aluminosilicalite, the ferric species in the ferrosilicalite maintain their oxidation state. The ability to selectively oxidize benzene to phenol with nitrous oxide in ferroaluminosilicalite relates to these Fe2+ centers. It is proposed that the large difference in reactivity between ferroaluminosilicalite and ferrosilicalite is due to the chemical difference of iron in Fe-O-Al and Fe-O-Fe adducts. A new preparation method is introduced which leads to more selective and stable catalysts. (C) 2004 Elsevier Inc. All rights reserved.
ISSN: 0021-9517
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Surface Chemistry and Catalysis
× corresponding author
# (joint) last author

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