Effect of Ir crystallographic site on the catalytic performance of Ir-substituted barium hexaferrites for N2O decomposition

	Effect of Ir crystallographic site on the catalytic performance of Ir-substituted barium hexaferrites for N2O decomposition
	Zhu, Yanyan 1,2; Wang, Xiaodong 1; Zhang, Yan 1,2; Wang, Junhu 1; Huang, Yanqiang 1; Kappenstein, Charles 3; Zhang, Tao 1
刊名	applied catalysis a-general
	2011-12-15
卷号	409 期号:待补充页码:194-201
关键词	Ir Crystallographic site Mossbauer spectroscopy N2O decomposition
ISSN号	0926-860x
通讯作者	王晓东 ; 张涛
产权排序	1,1
中文摘要	effect of ir crystallographic site on the catalytic performance of ir-substituted barium hexaferrites for n2o decomposition
英文摘要	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.
学科主题	物理化学
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
收录类别	SCI
语种	英语
WOS记录号	WOS:000298361900026
公开日期	2012-07-09
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/115805]
专题	大连化学物理研究所_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 Univ, Beijing 100049, Peoples R China 3.Univ Poitiers, LACCO UMR CNRS 6503, Lab Catalyse Met, F-86022 Poitiers, France
推荐引用方式 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.,...&Zhang, Tao.(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.