The role of Al in the structure and reactivity of iron centers in Fe-ZSM-5-based catalysts: a statistically based infrared study

被引：80

作者：

Berlier, G

Zecchina, A

Spoto, G

Ricchiardi, G

Bordiga, S

Lamberti, C

机构：

[1] Univ Turin, Dipartimento Chim Inorgan Chim Fis & Chim Mat, I-10125 Turin, Italy

[2] Univ Turin, INSTM UdR, I-10125 Turin, Italy

[3] Univ Turin, INFM, UdR, I-10125 Turin, Italy

来源：

JOURNAL OF CATALYSIS | 2003年 / 215卷 / 02期

关键词：

Fe-ZSM-5; alpha-oxygen; Fe(NO)(n) complexes; IR spectroscopy; partial oxidation catalyst;

D O I：

10.1016/S0021-9517(03)00004-6

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：

A statistical analysis of the infrared data obtained upon absorption of NO on a large number of Al-free Fe-silicalite and Fe-ZSM-5 samples highlighted the influence of Al on the formation and stabilization of extraframework iron species and shed more light on the superior activity of Fe-ZSM-5-based catalysts. It was concluded that Al favors the dispersion of extraframework iron species and that isolated Fell species with one or two Al atoms in the immediate vicinity are the active sites in partial oxidation reactions. The structure of the a-oxygen species adsorbed on iron centers is also briefly discussed. (C) 2003 Elsevier Science (USA). All rights reserved.

引用

页码：264 / 270

页数：7

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