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

E.J.M. Hensen, Q. Zhu, P.H. Liu, K.J. Chao, R.A. Santen, van

Research output: Contribution to journalArticleAcademicpeer-review

56 Citations (Scopus)

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 FeOAl and FeOFe adducts. A new preparation method is introduced which leads to more selective and stable catalysts.
Original languageEnglish
Pages (from-to)466-470
Number of pages5
JournalJournal of Catalysis
Volume226
Issue number2
DOIs
Publication statusPublished - 2004

Fingerprint

Dive into the research topics of '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'. Together they form a unique fingerprint.

Cite this