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题名: Spectroscopic Evidence of Extra-Framework Heterometallic Oxo-Clusters in Fe/Ga-ZSM-5 Catalysts
作者: Xia, Haian1;  Fleischman, Samuel D.2;  Li, Can1;  Scott, Susannah L.2, 3
刊名: JOURNAL OF PHYSICAL CHEMISTRY LETTERS
发表日期: 2011-02-03
DOI: 10.1021/jz101507s
卷: 2, 期:3, 页:190-195
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 ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science ;  Physics
英文摘要: The effect of introducing extra-framework Ga on the local structure of the metal sites in Fe/ZSM-5, resulting in enhanced reactivity toward N(2)O, was investigated using a combination of Raman and X-ray absorption spectroscopies. The Raman spectra indicate an increased abundance of oxo- and/or hydroxo-bridged diiron sites, whereas the Fe K-edge XANES reveals more extensive reduction of Fe(III) to Fe(II). Curvefits of the EXAFS at both the Ca and Fe K-edges are consistent with heterometallic oxo-clusters containing both Ca-Fe and Fe-Fe paths. The spectroscopic evidence suggests a tetranuclear [Fe(2)Ca(2)O(4)(2+)] core, possessing an open dicubane structure.
关键词[WOS]: CHEMICAL-VAPOR-DEPOSITION ;  HIGH-TEMPERATURE TREATMENT ;  N2O DECOMPOSITION ;  ACTIVE-SITES ;  FE/ZSM-5 CATALYSTS ;  DIOXYGEN ACTIVATION ;  NITROUS-OXIDE ;  NOX REDUCTION ;  IRON SITES ;  FE
语种: 英语
WOS记录号: WOS:000287048800011
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142374
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.Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA
3.Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA

Recommended Citation:
Xia, Haian,Fleischman, Samuel D.,Li, Can,et al. Spectroscopic Evidence of Extra-Framework Heterometallic Oxo-Clusters in Fe/Ga-ZSM-5 Catalysts[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2011,2(3):190-195.
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