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学科主题物理化学
Effect of Ir crystallographic site on the catalytic performance of Ir-substituted barium hexaferrites for N2O decomposition
Zhu, Yanyan1,2; Wang, Xiaodong1; Zhang, Yan1,2; Wang, Junhu1; Huang, Yanqiang1; Kappenstein, Charles3; Zhang, Tao1; Wang XD(王晓东); Zhang T(张涛)
关键词Ir Crystallographic Site Mossbauer Spectroscopy N2o Decomposition
刊名APPLIED CATALYSIS A-GENERAL
2011-12-15
ISSN0926-860X
DOI10.1016/j.apcata.2011.10.002
409期:待补充页:194-201
收录类别SCI
文章类型Article
部门归属15
项目归属1501
产权排名1,1
WOS标题词Science & Technology ; Physical Sciences ; Life Sciences & Biomedicine
类目[WOS]Chemistry, Physical ; Environmental Sciences
研究领域[WOS]Chemistry ; Environmental Sciences & Ecology
关键词[WOS]NITROUS-OXIDE ; HEXAALUMINATE CATALYSTS ; MOSSBAUER-SPECTROSCOPY ; CRYSTAL-STRUCTURE ; BETA-ALUMINA ; COMBUSTION ; METHANE ; OXYGEN ; OXIDATION ; FE-ZSM-5
英文摘要Effect of Ir crystallographic site on the catalytic performance of Ir-substituted barium hexaferrites for N2O decomposition; Ir-substituted barium hexaferrites (BaIrxFe12-xO19, x <= 0.6) were prepared using the carbonates route and investigated for high-concentration N2O decomposition. It was found that BaIrxFe12-xO19 offered a better dispersion of iridium by incorporating Ir into the hexaferrite structure. The crystallographic sites of Ir in BaIrxFe12-xO19 were identified through the analysis of Fe occupancy in the matrix by sensitive Fe-57 Mossbauer spectroscopy. Framework iridium preferentially occupied the octahedral sites in the order of 2a, 12k, and 4f(2) as increasing x value. When x = 0.1 and 0.4, the substitution of Ir for Fe3+ occurred in the 2a and 12k sites in the rigid spinel block with a comparable N2O decomposition activity, while this substitution in the 4f(2) sites in the mirror plane at x = 0.6 resulted in a remarkable enhancement of activity. Ir ions in the octahedral 4f(2) sites in the loosely packed mirror plane were highly active for N2O decomposition. (C) 2011 Elsevier B.V. All rights reserved.
语种英语
WOS记录号WOS:000298361900026
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/115805
专题中国科学院大连化学物理研究所
通讯作者Wang XD(王晓东); Zhang T(张涛)
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
3.Univ Poitiers, LACCO UMR CNRS 6503, Lab Catalyse Met, F-86022 Poitiers, France
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GB/T 7714
Zhu, Yanyan,Wang, Xiaodong,Zhang, Yan,et al. Effect of Ir crystallographic site on the catalytic performance of Ir-substituted barium hexaferrites for N2O decomposition[J]. APPLIED CATALYSIS A-GENERAL,2011,409(待补充):194-201.
APA Zhu, Yanyan.,Wang, Xiaodong.,Zhang, Yan.,Wang, Junhu.,Huang, Yanqiang.,...&张涛.(2011).Effect of Ir crystallographic site on the catalytic performance of Ir-substituted barium hexaferrites for N2O decomposition.APPLIED CATALYSIS A-GENERAL,409(待补充),194-201.
MLA Zhu, Yanyan,et al."Effect of Ir crystallographic site on the catalytic performance of Ir-substituted barium hexaferrites for N2O decomposition".APPLIED CATALYSIS A-GENERAL 409.待补充(2011):194-201.
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