Sn promoted BaFeO3-delta catalysts for N2O decomposition: Optimization of CrossMark Fe active centers
文献类型：期刊论文
| 作者 | Huang, Chuande2,3; Zhu, Yanyan1; Wang, Xiaodong2; Liu, Xin2; Wang, Junhu2; Zhang, Tao2 |
| 刊名 | JOURNAL OF CATALYSIS
 |
| 出版日期 | 2017-03-01 |
| 卷号 | 347页码:9-20 |
| 关键词 | Perovskite B-site Substitution Oxygen Mobility Mossbauer Spectroscopy N2o Decomposition |
| ISSN号 | 0021-9517 |
| DOI | 10.1016/j.jcat.2016.12.020 |
| 文献子类 | Article |
| 英文摘要 | A 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. |
| WOS关键词 | FE-57 MOSSBAUER-SPECTROSCOPY ; PEROVSKITE OXIDES ; HIGH-TEMPERATURE ; OXYGEN MOBILITY ; SOLID-SOLUTIONS ; NITROUS-OXIDE ; X-RAY ; PHOTOELECTRON-SPECTROSCOPY ; HETEROGENEOUS CATALYSIS ; MFI ZEOLITES |
| WOS研究方向 | Chemistry ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000396958000002 |
| 出版者 | ACADEMIC PRESS INC ELSEVIER SCIENCE |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/169476]  |
| 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 |
| 通讯作者 | Wang, Xiaodong |
| 作者单位 | 1.Northwest Univ Xian, Coll Chem Engn, Xian 710069, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：大连化学物理研究所
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