Identification of the chemical state of Fe in barium hexaaluminate using Rietveld refinement and Fe-57 Mossbauer spectroscopy
文献类型：期刊论文
| 作者 | Zhu, Yanyan1,2; Wang, Xiaodong1; Wang, Aiqin1; Wu, Guotao1; Wang, Junhu1; Zhang, Tao1 |
| 刊名 | journal of catalysis
 |
| 出版日期 | 2011-10-27 |
| 卷号 | 283期号:2页码:149-160 |
| 关键词 | Hexaaluminate Chemical state of Fe Rietveld refinement Mossbauer spectroscopy N2O decomposition |
| 英文摘要 | the catalytic activity of hexaaluminate is closely related to the chemical state of substituted active metal ions. in this paper, the mechanism of stabilization of fe ions in beta(1)-al2o3 and magnetoplumbite-type fe-substituted ba hexaaluminates was proposed at the molecule level on the basis of x-ray diffraction, rietveld refinement, and mossbauer spectroscopy. fe3+ ions originated from oxidic entities dispersed on ba-modified gamma-al2o3 mainly entered into the sites in the loosely packed mirror plane of the hexaaluminates. in particular, fe3+ ions at low concentration preferentially occupied the tetrahedral al(5) sites of the beta(1)-al2o3 phase, while fe3+ ions at high concentration mainly occupied the trigonal bipyramidal al(5) and octahedral al(3) sites in the magnetoplumbite phase. meanwhile, tetrahedral fe3+ ions in the intermediate spinel-type baal2o4 phase preferentially entered into the tetrahedral al(2) sites in the spinel block of hexaaluminates. fe ions in the al(5) sites of beta(1)-al2o3 and the al(3) sites of magnetoplumbite phase were highly active for n2o decomposition. (c) 2011 elsevier inc. all rights reserved. |
| WOS标题词 | science & technology ; physical sciences ; technology |
| 类目[WOS] | chemistry, physical ; engineering, chemical |
| 研究领域[WOS] | chemistry ; engineering |
| 关键词[WOS] | temperature catalytic combustion ; nitrous-oxide decomposition ; density-functional theory ; crystal-structure ; beta-alumina ; n2o decomposition ; partial oxidation ; substituted ba-beta-al2o3 ; cation valence ; methane |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000296678500005 |
| 公开日期 | 2015-11-17 |
| 源URL | [http://159.226.238.44/handle/321008/142301]  |
| 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,Wang, Aiqin,et al. Identification of the chemical state of Fe in barium hexaaluminate using Rietveld refinement and Fe-57 Mossbauer spectroscopy[J]. journal of catalysis,2011,283(2):149-160. |
| APA | Zhu, Yanyan,Wang, Xiaodong,Wang, Aiqin,Wu, Guotao,Wang, Junhu,&Zhang, Tao.(2011).Identification of the chemical state of Fe in barium hexaaluminate using Rietveld refinement and Fe-57 Mossbauer spectroscopy.journal of catalysis,283(2),149-160. |
| MLA | Zhu, Yanyan,et al."Identification of the chemical state of Fe in barium hexaaluminate using Rietveld refinement and Fe-57 Mossbauer spectroscopy".journal of catalysis 283.2(2011):149-160. |
入库方式： OAI收割
来源：大连化学物理研究所
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