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Sn promoted BaFeO3-delta catalysts for N2O decomposition: Optimization of CrossMark Fe active centers
Huang, Chuande1,2; Zhu, Yanyan3; Wang, Xiaodong1; Liu, Xin1; Wang, Junhu1; Zhang, Tao1
KeywordPerovskite B-site Substitution Oxygen Mobility Mossbauer Spectroscopy N2o Decomposition
Source PublicationJOURNAL OF CATALYSIS
2017-03-01
ISSN0021-9517
DOI10.1016/j.jcat.2016.12.020
Volume347Pages:9-20
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
WOS KeywordFE-57 MOSSBAUER-SPECTROSCOPY ; PEROVSKITE OXIDES ; HIGH-TEMPERATURE ; OXYGEN MOBILITY ; SOLID-SOLUTIONS ; NITROUS-OXIDE ; X-RAY ; PHOTOELECTRON-SPECTROSCOPY ; HETEROGENEOUS CATALYSIS ; MFI ZEOLITES
AbstractA series of BaFe1-xSnxO3-delta catalysts were prepared by sol-gel method and tested for N2O decomposition to shed light on the effect of B-site substitution on the catalytic behavior of perovskite catalysts. Sn-119 and Fe-57 Mossbauer results confirmed that the 5-fold coordinated Fe3+ cations with one adjacent oxygen vacancy (Fe3+-O-5) were the main active centers for N2O decomposition. Doping of Sn cations can significantly improve the percentage of Fe3+-O-5 from 30% (x = 0) to 68% (x = 0.8). More importantly, the valence state of Fe could be gradually reduced due to weakening of Fe-O bond with increasing the Sn content, which was attributed to the stronger force of Sn than Fe in Fe-O Sn structure to draw the oxygen anion and expansion of unit cell volume. Such change of Fe chemical state favored the oxygen mobility of the catalyst, leading to reduction in activation energy for N2O decomposition from ca. 241 (x = 0) to 178 kJ moL(-1) (x = 0.8). BaFe0.2Sn0.8O3-delta,5 catalyst exhibited the highest intrinsic rate of 1.49 s(-1) (550 degrees C), nearly 4 times larger than that of BaFeO3-delta (0.43 s(-1)). (C) 2017 Elsevier Inc. All rights reserved.
Language英语
WOS IDWOS:000396958000002
PublisherACADEMIC PRESS INC ELSEVIER SCIENCE
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/169477
Collection中国科学院大连化学物理研究所
Corresponding AuthorWang, Xiaodong
Affiliation1.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.Northwest Univ Xian, Coll Chem Engn, Xian 710069, Peoples R China
Recommended Citation
GB/T 7714
Huang, Chuande,Zhu, Yanyan,Wang, Xiaodong,et al. Sn promoted BaFeO3-delta catalysts for N2O decomposition: Optimization of CrossMark Fe active centers[J]. JOURNAL OF CATALYSIS,2017,347:9-20.
APA Huang, Chuande,Zhu, Yanyan,Wang, Xiaodong,Liu, Xin,Wang, Junhu,&Zhang, Tao.(2017).Sn promoted BaFeO3-delta catalysts for N2O decomposition: Optimization of CrossMark Fe active centers.JOURNAL OF CATALYSIS,347,9-20.
MLA Huang, Chuande,et al."Sn promoted BaFeO3-delta catalysts for N2O decomposition: Optimization of CrossMark Fe active centers".JOURNAL OF CATALYSIS 347(2017):9-20.
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