DICP OpenIR
Subject Area物理化学
Effect of Ir crystallographic site on the catalytic performance of Ir-substituted barium hexaferrites for N2O decomposition
Zhu, Yanyan1,2; Wang, Xiaodong1; Zhang, Yan1,2; Wang, Junhu1; Huang, Yanqiang1; Kappenstein, Charles3; Zhang, Tao1; Wang XD(王晓东); Zhang T(张涛)
KeywordIr Crystallographic Site Mossbauer Spectroscopy N2o Decomposition
Source PublicationAPPLIED CATALYSIS A-GENERAL
2011-12-15
ISSN0926-860X
DOI10.1016/j.apcata.2011.10.002
Volume409Issue:待补充Pages:194-201
Indexed BySCI
SubtypeArticle
Department15
Funding Project1501
Contribution Rank1,1
WOS HeadingsScience & Technology ; Physical Sciences ; Life Sciences & Biomedicine
WOS SubjectChemistry, Physical ; Environmental Sciences
WOS Research AreaChemistry ; Environmental Sciences & Ecology
WOS KeywordNITROUS-OXIDE ; HEXAALUMINATE CATALYSTS ; MOSSBAUER-SPECTROSCOPY ; CRYSTAL-STRUCTURE ; BETA-ALUMINA ; COMBUSTION ; METHANE ; OXYGEN ; OXIDATION ; FE-ZSM-5
AbstractEffect of Ir crystallographic site on the catalytic performance of Ir-substituted barium hexaferrites for N2O decomposition; Ir-substituted barium hexaferrites (BaIrxFe12-xO19, x <= 0.6) were prepared using the carbonates route and investigated for high-concentration N2O decomposition. It was found that BaIrxFe12-xO19 offered a better dispersion of iridium by incorporating Ir into the hexaferrite structure. The crystallographic sites of Ir in BaIrxFe12-xO19 were identified through the analysis of Fe occupancy in the matrix by sensitive Fe-57 Mossbauer spectroscopy. Framework iridium preferentially occupied the octahedral sites in the order of 2a, 12k, and 4f(2) as increasing x value. When x = 0.1 and 0.4, the substitution of Ir for Fe3+ occurred in the 2a and 12k sites in the rigid spinel block with a comparable N2O decomposition activity, while this substitution in the 4f(2) sites in the mirror plane at x = 0.6 resulted in a remarkable enhancement of activity. Ir ions in the octahedral 4f(2) sites in the loosely packed mirror plane were highly active for N2O decomposition. (C) 2011 Elsevier B.V. All rights reserved.
Language英语
WOS IDWOS:000298361900026
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/115805
Collection中国科学院大连化学物理研究所
Corresponding AuthorWang XD(王晓东); Zhang T(张涛)
Affiliation1.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.Univ Poitiers, LACCO UMR CNRS 6503, Lab Catalyse Met, F-86022 Poitiers, France
Recommended Citation
GB/T 7714
Zhu, Yanyan,Wang, Xiaodong,Zhang, Yan,et al. Effect of Ir crystallographic site on the catalytic performance of Ir-substituted barium hexaferrites for N2O decomposition[J]. APPLIED CATALYSIS A-GENERAL,2011,409(待补充):194-201.
APA Zhu, Yanyan.,Wang, Xiaodong.,Zhang, Yan.,Wang, Junhu.,Huang, Yanqiang.,...&张涛.(2011).Effect of Ir crystallographic site on the catalytic performance of Ir-substituted barium hexaferrites for N2O decomposition.APPLIED CATALYSIS A-GENERAL,409(待补充),194-201.
MLA Zhu, Yanyan,et al."Effect of Ir crystallographic site on the catalytic performance of Ir-substituted barium hexaferrites for N2O decomposition".APPLIED CATALYSIS A-GENERAL 409.待补充(2011):194-201.
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