Identification of the Crystallographic Sites of Ir in BaIr0.2FeAl10.8O19 Hexaaluminate

	Identification of the Crystallographic Sites of Ir in BaIr0.2FeAl10.8O19 Hexaaluminate
	Zhu, Yanyan 1; Wang, Xiaodong 1; Huang, Yanqiang 1; Zhang, Yan 1,2; Wu, Guotao 1; Wang, Junhu 1; Zhang, Tao 1
刊名	journal of physical chemistry c
	2012-11-22
卷号	116 期号:46 页码:24487-24495
通讯作者	王晓东 ; 张涛
产权排序	1,1
英文摘要	noble metal ions in hexaaluminate structure are generally regarded as active centers for a variety of reactions, but their chemical states are still not clear for lack of effective characterization techniques. in this paper, in comparison with bafeal11o19, the crystallographic site of ir in bair0.2feal10.8o19 hexaaluminate with ba-beta(1)-al2o3 structure was identified by rietveld refinement and fe-57 mossbauer spectroscopy. in the bair0.2feal10.8o19 hexaaluminate structure, fe occupied both the symmetric tetrahedral al(2) sites in the spinel block and the distorted tetrahedral interstitial al(5) sites in the mirror plane. in contrast to fe, the framework ir ions only occupied the distorted tetrahedral interstitial al(5) sites in the loosely packed mirror plane, which originated from ir ions in oxidic entities dispersed on the ba-modified gamma-al2o3 in the precursor. ir ions in the al(5) sites were highly active for n2o decomposition.
学科主题	物理化学
类目[WOS]	chemistry, physical ; nanoscience & nanotechnology ; materials science, multidisciplinary
研究领域[WOS]	chemistry ; science & technology - other topics ; materials science
关键词[WOS]	temperature catalytic combustion ; nitrous-oxide ; barium hexaaluminate ; n2o decomposition ; crystal-structure ; beta-alumina ; partial oxidation ; fe ; mossbauer ; methane
收录类别	SCI
语种	英语
WOS记录号	WOS:000311461100012
公开日期	2013-10-11
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/118198]
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
推荐引用方式 GB/T 7714	Zhu, Yanyan,Wang, Xiaodong,Huang, Yanqiang,et al. Identification of the Crystallographic Sites of Ir in BaIr0.2FeAl10.8O19 Hexaaluminate[J]. journal of physical chemistry c,2012,116(46):24487-24495.
APA	Zhu, Yanyan.,Wang, Xiaodong.,Huang, Yanqiang.,Zhang, Yan.,Wu, Guotao.,...&Zhang, Tao.(2012).Identification of the Crystallographic Sites of Ir in BaIr0.2FeAl10.8O19 Hexaaluminate.journal of physical chemistry c,116(46),24487-24495.
MLA	Zhu, Yanyan,et al."Identification of the Crystallographic Sites of Ir in BaIr0.2FeAl10.8O19 Hexaaluminate".journal of physical chemistry c 116.46(2012):24487-24495.