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题名: Influence of extra-framework Al on the structure of the active iron sites in Fe/ZSM-35
作者: Wang, Junying1, 2;  Xia, Haian1;  Ju, Xiaohua1;  Feng, Zhaochi1;  Fan, Fengtao1;  Li, Can1
关键词: Binuclear iron sites ;  Extra-framework Al ;  N2O decomposition ;  Fe/ZSM-35 ;  Raman spectroscopy
刊名: JOURNAL OF CATALYSIS
发表日期: 2013-04-01
DOI: 10.1016/j.jcat.2013.01.011
卷: 300, 页:251-259
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: The influence of extra-framework Al via AlCl3 deposition on the structure of the active Fe sites in Fe/ZSM-35 was investigated by Si-29 MAS NMR, UV-visible diffuse reflectance spectroscopy, infrared spectroscopy, UV Raman spectroscopy, and Fe-57 Mossbauer spectroscopy combined with catalytic decomposition of N2O. It is found that high-temperature treatment considerably modifies the iron speciation. UV-visible diffuse reflectance spectra and in situ infrared spectra of NO adsorption show that a significant amount of clustered and cationic Fe species is transformed into extra-framework Fe-O-Al mixed oxide species by high-temperature treatment. UV Raman spectra and Fe-57 Mossbauer spectra suggest the generation of a binuclear Fe site stabilized by extra-framework Al species with a feature Raman band at 875 cm(-1), which is associated with the high activity of N2O decomposition. A possible explanation is that the addition of extra-framework Al species is beneficial for the formation of binuclear active Fe sites bound to extra-framework Al. (C) 2013 Published by Elsevier Inc.
关键词[WOS]: RESONANCE RAMAN-SPECTROSCOPY ;  CHARGE-TRANSFER SPECTRA ;  STATE ION-EXCHANGE ;  LOW FE CONTENT ;  N2O DECOMPOSITION ;  NITROUS-OXIDE ;  BENZENE HYDROXYLATION ;  IN-SITU ;  HETEROGENEOUS CATALYSIS ;  MOSSBAUER-SPECTROSCOPY
语种: 英语
WOS记录号: WOS:000317558000028
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137792
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Wang, Junying,Xia, Haian,Ju, Xiaohua,et al. Influence of extra-framework Al on the structure of the active iron sites in Fe/ZSM-35[J]. JOURNAL OF CATALYSIS,2013,300:251-259.
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