Characterization of Fe Substitution into La-Hexaaluminate Systems and the Effect on N2O Catalytic Decomposition

	Characterization of Fe Substitution into La-Hexaaluminate Systems and the Effect on N2O Catalytic Decomposition
	Zhang, Yan 1,2; Wang, Xiaodong 1; Zhu, Yanyan 3; Hou, Baolin 1; Yang, Xiaofeng 1; Liu, Xin 1; Wang, Junhu 1; Li, Jun 4; Zhang, Tao 1
刊名	journal of physical chemistry c
	2014-01-30
卷号	118 期号:4 页码:1999-2010
英文摘要	compared to ba-hexaaluminates with beta-al2o3 structure, la-hexaaluminates with magnetoplumbite (mp) structure have more substituted al sites in the preferentially exposed mirror plane, which should favor n2o decomposition. in this regard, lafexal12-xo19 catalysts with x = 1 and 5 were herein prepared using the coprecipitation method. fe-57 mossbauer spectroscopy and x-ray diffraction structure refinements revealed that fe3+ ions originating in fe2o3 species mainly entered tetrahedral al(2) and trigonal bipyramidal al(5) sites. meanwhile, fe3+ ions in octahedral sites of perovskite-type lafeo3 intermediates preferentially accommodated in octahedral al(3) sites in the mirror plane of la-hexaaluminates. correlation of normalized rates (moles of n2o per hour per square meter) of the catalysts at 500 degrees c with the occupancy of fe ions in different al crystallographic sites of the mp phase indicated that fe3+ ions in the al(3) and al(5) sites were highly active for n2o decomposition. in contrast, fe2+ derived from a fe3+ -> fe2+ reduction under high-temperature calcination played a negative role.
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
关键词[WOS]	initio molecular-dynamics ; total-energy calculations ; perovskite-type oxides ; augmented-wave method ; x-ray-diffraction ; crystal-structure ; barium hexaaluminate ; beta-alumina ; crystallographic sites ; partial oxidation
收录类别	SCI
语种	英语
WOS记录号	WOS:000330610200029
公开日期	2016-05-09
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/145684]
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.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.NW Univ Xian, Coll Chem Engn, Xian 710069, Peoples R China 4.Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Yan,Wang, Xiaodong,Zhu, Yanyan,et al. Characterization of Fe Substitution into La-Hexaaluminate Systems and the Effect on N2O Catalytic Decomposition[J]. journal of physical chemistry c,2014,118(4):1999-2010.
APA	Zhang, Yan.,Wang, Xiaodong.,Zhu, Yanyan.,Hou, Baolin.,Yang, Xiaofeng.,...&Zhang, Tao.(2014).Characterization of Fe Substitution into La-Hexaaluminate Systems and the Effect on N2O Catalytic Decomposition.journal of physical chemistry c,118(4),1999-2010.
MLA	Zhang, Yan,et al."Characterization of Fe Substitution into La-Hexaaluminate Systems and the Effect on N2O Catalytic Decomposition".journal of physical chemistry c 118.4(2014):1999-2010.