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学科主题: 物理化学
题名: Identification of the Crystallographic Sites of Ir in BaIr0.2FeAl10.8O19 Hexaaluminate
作者: Zhu, Yanyan1;  Wang, Xiaodong1;  Huang, Yanqiang1;  Zhang, Yan1, 2;  Wu, Guotao1;  Wang, Junhu1;  Zhang, Tao1
通讯作者: 王晓东 ;  张涛
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2012-11-22
DOI: 10.1021/jp3007238
卷: 116, 期:46, 页:24487-24495
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
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
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.
关键词[WOS]: TEMPERATURE CATALYTIC COMBUSTION ;  NITROUS-OXIDE ;  BARIUM HEXAALUMINATE ;  N2O DECOMPOSITION ;  CRYSTAL-STRUCTURE ;  BETA-ALUMINA ;  PARTIAL OXIDATION ;  FE ;  MOSSBAUER ;  METHANE
语种: 英语
WOS记录号: WOS:000311461100012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/118198
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.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
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.
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