Extraframework Fe-Al-O species occluded in MFI zeolite as the active species in the oxidation of benzene to phenol with nitrous oxide

被引：113

作者：

Hensen, EJM ^{[1
]}

Zhu, Q ^{[1
]}

van Santen, RA ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Schuit Inst Catalysis, NL-5600 MB Eindhoven, Netherlands

来源：

JOURNAL OF CATALYSIS | 2003年 / 220卷 / 02期

关键词：

FeZSM-5; benzene oxidation; nitrous oxide; active sites; extraframework; infrared spectroscopy;

D O I：

10.1016/j.jcat.2003.09.001

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Iron and aluminum are required for the formation of active sites in MFI-type zeolites for benzene oxidation to phenol by nitrous oxide. We propose that the active species are extraframework Fe-Al-O species. These species produce characteristic IR bands around 1625 and 1635 cm(-1) after exposure to NO which are different from those found in Fe-substituted silicalite-1 and HZSM-5. While we only observe negligible benzene oxidation activities for these latter materials, a MFI zeolite containing Fe and Al shows good performance. Additionally, we found that postsynthesis dispersion of aluminum to Fe-substituted silicalite-1 offers an alternative preparation route to an active material. (C) 2003 Elsevier Inc. All rights reserved.

引用

页码：260 / 264

页数：5

共 24 条

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