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学科主题: 物理化学
题名: Stabilization mechanism and crystallographic sites of Ru in Fe-promoted barium hexaaluminate under high-temperature condition for N2O decomposition
作者: Zhang, Yan1, 2;  Wang, Xiaodong1;  Zhu, Yanyan3;  Zhang, Tao1
通讯作者: 王晓东 ;  张涛
关键词: Stabilization of ruthenium ;  Hexaaluminate ;  Iron ;  Rietveld refinement ;  N2O decomposition
刊名: APPLIED CATALYSIS B-ENVIRONMENTAL
发表日期: 2013-01-17
DOI: 10.1016/j.apcatb.2012.10.001
卷: 129, 页:382-393
收录类别: SCI
合作性质: 
文章类型: Article
部门归属: 15
项目归属: 1501
产权排名: 待补充
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Environmental ;  Engineering, Chemical
资助者: 1,1
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: The stabilization of volatile ruthenium from catalysts at high temperatures is an important issue in both academia and industry. In this paper, Ru-substituted barium hexaalumimates (BaRu0.2FeAl10.8O19) with beta(1)-Al2O3 structure were prepared using the carbonates route and investigated for high-concentration of N2O decomposition. It was for the first time found that the evaporation of ruthenium species under high-temperature condition (1100-1200 degrees C) could be effectively suppressed by the addition of Fe in the hexaaluminate precursor. Fe promoted the formation of intermediate stable BaRuO3 phase, which greatly alleviated the evaporation of Ru species during calcination, and thus allowed more Ru species enter into the final sintering-resistant hexaaluminate lattice after high-temperature treatment. Ru ions in the hexaaluminate structure only occupied the distorted tetrahedral interstitial Al(5) sites in the loosely packed mirror plane, which originated from Ru species in oxidic entities dispersed on the Ba-modified gamma-Al2O3 and the intermediate BaRuO3 in the precursors. Ru ions in the Al(5) sites were key factors responsible for the high activity of N2O decomposition. (C) 2012 Elsevier B.V. All rights reserved.
关键词[WOS]: CATALYTIC DECOMPOSITION ;  NITROUS-OXIDE ;  CRYSTAL-STRUCTURE ;  BETA-ALUMINA ;  SUBSTITUTED BA-BETA-AL2O3 ;  SUPERIOR PERFORMANCE ;  DE-N2O PERFORMANCE ;  PARTIAL OXIDATION ;  RUTHENIUM OXIDE ;  CATION VALENCE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000312689500043
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/119529
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
3.NW Univ Xian, Coll Chem Engn, Xian 710069, Peoples R China

Recommended Citation:
Zhang, Yan,Wang, Xiaodong,Zhu, Yanyan,et al. Stabilization mechanism and crystallographic sites of Ru in Fe-promoted barium hexaaluminate under high-temperature condition for N2O decomposition[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2013,129:382-393.
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