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Effect of extra-framework gallium on the structure of iron species in Fe/ZSM-5
Xia, Haian1,2; Sun, Keqiang1; Fan, Fengtao1,2; Sun, Keju1,2; Su, Weiguang1,2; Feng, Zhaochi1; Ying, Pinliang1; Li, Can1
关键词Raman Spectroscopy N2o Decomposition Transient Response Extra-framework Ga Isolated Bi-nuclear Oligo-nuclear
刊名JOURNAL OF CATALYSIS
2008-10-25
DOI10.1016/j.jcat.2008.09.001
259期:2页:269-275
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
关键词[WOS]NITROUS-OXIDE DECOMPOSITION ; SELECTIVE CATALYTIC-REDUCTION ; HIGH-TEMPERATURE TREATMENT ; CHEMICAL-VAPOR-DEPOSITION ; N2O DECOMPOSITION ; ACTIVE-SITES ; BENZENE HYDROXYLATION ; NOX REDUCTION ; MFI ZEOLITES ; MOSSBAUER-SPECTROSCOPY
英文摘要A series of Fe/Ga-ZSM-5 catalysts with different Ga contents were prepared by solid-state ion exchange method. Ultraviolet and visible Raman spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy, H-2-temperature-programmed reduction, and N2O decomposition at 523 K were used to investigate the effect of extra-framework Ga on the nature of the Fe species in Fe/Ga-ZSM-5 catalysts. Introducing extra-framework Ga and high-temperature treatment can significantly affect the distribution even the nature of the Fe species in Fe/Ga-ZSM-5. For the high-temperature treated catalysts, the presence of extra-framework Ga remarkably increases the amount of the Fe(II) sites and the activity of direct N2O decomposition, suggesting that extra-framework Ga can promote the formation of the active sites for N2O decomposition. The possible interpretation of the beneficial role of extra-framework Ga is that extra-framework Ga facilitates the reduction of bi- and oligo-nuclear Fe(III) sites to form the Fe(II) sites and interacts with the Fe sites with low nuclearity to form a mixed Fe-Ga-O phase for the high-temperature treated catalysts. (C) 2008 Elsevier Inc. All rights reserved.
语种英语
WOS记录号WOS:000260978000013
引用统计
被引频次:16[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/140829
专题中国科学院大连化学物理研究所
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 Sch, Beijing 100039, Peoples R China
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Xia, Haian,Sun, Keqiang,Fan, Fengtao,et al. Effect of extra-framework gallium on the structure of iron species in Fe/ZSM-5[J]. JOURNAL OF CATALYSIS,2008,259(2):269-275.
APA Xia, Haian.,Sun, Keqiang.,Fan, Fengtao.,Sun, Keju.,Su, Weiguang.,...&Li, Can.(2008).Effect of extra-framework gallium on the structure of iron species in Fe/ZSM-5.JOURNAL OF CATALYSIS,259(2),269-275.
MLA Xia, Haian,et al."Effect of extra-framework gallium on the structure of iron species in Fe/ZSM-5".JOURNAL OF CATALYSIS 259.2(2008):269-275.
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