Spin states of iron-nitrosyl adsorption complexes formed in Fe-ZSM5 zeolites

被引：7
|
作者：
Malykhin, S. E. [1 ]
Volodin, A. M. [1 ]
Zhidomirov, G. M. [1 ]
机构：
[1] Russian Acad Sci, Inst Catalysis, Novosibirsk 630090, Russia
来源：
APPLIED MAGNETIC RESONANCE | 2008年 / 33卷 / 1-2期
关键词：
D O I：
10.1007/s00723-008-0055-2
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
The capability of extra-framework monoiron sites to adsorb up to three NO molecules has been proven by quantum chemical calculations. Spin states of iron-nitrosyl adsorption complexes formed in Fe-ZSM5 zeolites have been found. For an initial iron site with S = 2, successive adsorption of one, two and three NO molecules changes S to 3/2, 1 and 1/2, respectively. Thus, the electron paramagnetic resonance (EPR) S = 1/2 signal observed after NO adsorption on the Fe-ZSM5 catalyst may be assigned to the Fe2+(NO)(3) species. Some peculiarities of the S = 1/2 EPR spectra obtained for iron-nitrosyl species in zeolites are discussed.
引用
收藏
页码：153 / 166
页数：14
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