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学科主题: 物理化学
题名: Evolution of Fe Crystallographic Sites from Barium Hexaaluminate to Hexaferrite
作者: Zhu, Yanyan1, 2;  Wang, Xiaodong1;  Wu, Guotao1;  Huang, Yanqiang1;  Zhang, Yan1, 2;  Wang, Junhu1;  Zhang, Tao1
通讯作者: 王晓东 ;  张涛
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2012-01-12
DOI: 10.1021/jp2067414
卷: 116, 期:1, 页:671-680
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 ;  Technology
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: The substituted metal ions in the hexaaluminate structure are regarded as active centers, but their very limited substituted content prevents the obtainment of higher activity. Fe-substituted hexaaluminates exceptionally overcome such a limit. In this paper, we have studied the Fe crystallographic sites in BaFexAl12-xO19 (x = 1-12) and proposed the unique mechanism of stabilization of Fe ions in hexaaluminate structure at a high substitution level by employment of Rietveld refinement and Fe-57 Mossbauer spectroscopy. When x = 1-4, the site occupancy of Fe3+ in both beta(1)-Al2O3 and newly formed magnetoplumbite phases was kept constant, and the increased Fe3+ ions were accommodated by the increased amount of magnetoplumbite phase. When x = 5-12, the site occupancy of Fe3+ in the magnetoplumbite phase continuously increased, and thus the increased Fe3+ ions were accommodated by the magnetoplumbite structure. BaFexAl12-xO19 catalysts exhibited different N2O decomposition properties under conventional furnace heating and microwave heating modes.
关键词[WOS]: TEMPERATURE CATALYTIC COMBUSTION ;  CRYSTAL-STRUCTURE ;  N2O DECOMPOSITION ;  PARTIAL OXIDATION ;  BETA-ALUMINA ;  MAGNETIC-PROPERTIES ;  METHANE ;  MOSSBAUER ;  MICROWAVE ;  REDUCTION
语种: 英语
WOS记录号: WOS:000298978700083
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/118252
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,Wu, Guotao,et al. Evolution of Fe Crystallographic Sites from Barium Hexaaluminate to Hexaferrite[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2012,116(1):671-680.
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