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题名: Effect of Water on Active Iron Sites for N2O Decomposition over Fe/ZSM-5 Catalyst
作者: Xia, Haian1;  Sun, Keqiang1;  Feng, Zhaochi1;  Li, Can1
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2011-01-20
DOI: 10.1021/jp1094917
卷: 115, 期:2, 页:542-548
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: The effect of H2O on N2O decomposition in Fe/ZSM-5 catalyst was investigated by steady-state kinetics, transient response methods, in situ Raman, and IR spectroscopies. Fe/ZSM-5 catalysts show very high activity in N2O decomposition but are deactivated rapidly when trace amounts of water are present. In situ Raman spectra results indicate that the peroxide bridge on the binuclear Fe sites are converted to the hydroxylated binuclear Fe sites when exposed to water. It was found that the Raman band at 743 cm(-1) and the IR bands at 3628 and 3672 cm(-1) are associated with the deactivation of the catalyst during N2O decomposition. The catalyst was regenerated after calcination at a temperature over 773 K. The inhibiting effect of H2O on N2O decomposition indicates that the presence of water leads to the structural transformation from the dehydroxylated binuclear Fe sites to the hydroxylated binuclear Fe sites on Fe/ZSM-5.
关键词[WOS]: NITROUS-OXIDE DECOMPOSITION ;  HIGH-TEMPERATURE TREATMENT ;  CHEMICAL-VAPOR-DEPOSITION ;  EX-FRAMEWORK FEZSM-5 ;  SELECTIVE OXIDATION ;  MFI ZEOLITES ;  COMPREHENSIVE DFT ;  KINETIC-ANALYSIS ;  NOX REDUCTION ;  FE-SILICALITE
语种: 英语
WOS记录号: WOS:000286090100030
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142354
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

Recommended Citation:
Xia, Haian,Sun, Keqiang,Feng, Zhaochi,et al. Effect of Water on Active Iron Sites for N2O Decomposition over Fe/ZSM-5 Catalyst[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2011,115(2):542-548.
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