Effects of Fe dopants and residual carbonates on the catalytic activities of the perovskite-type La0.7Sr0.3Co1-xFexO3 NOx storage catalyst
文献类型：期刊论文
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| 作者 | Ma, AJ; Wang, SZ; Liu, C; Xian, H; Ding, Q; Guo, L; Meng, M; Tan, YS; Tsubaki, N; Zhang, J |
| 刊名 | APPLIED CATALYSIS B-ENVIRONMENTAL
 ; APPLIED CATALYSIS B-ENVIRONMENTAL
|
| 出版日期 | 2014 ; 2014 |
| 卷号 | 146期号:SI页码:24-34 |
| 关键词 | Perovskite Fe dopant Carbonates NOx storage Sulfur tolerance Perovskite Fe dopant Carbonates NOx storage Sulfur tolerance |
| ISSN号 | 0926-3373 |
| DOI | 10.1016/j.apcatb.2013.06.005 |
| 英文摘要 | Herein, we reported the NOx storage capacity, NO oxidation ability and sulfur resistance of the La0.7Sr0.3CoO3-based perovskite-type catalysts. NO could be readily oxidized to NO2 with around 83% of NO-to-NO2 conversion at 300 degrees C over the perovskite. After sulfation, the NSC of the La0.7Sr0.3CoO3 catalyst calcined in static air decreased 58.0%. Nevertheless, a significant improvement of the sulfur tolerance could be achieved through partial substitution of Co with Fe cations, as well as calcination in flowing air. The NSC of the pre-sulfated La0.7Sr0.3Co0.8Fe0.2O3 catalyst maintained 360.7 mu mol/g and dropped only 6.4% as compared with the fresh one. The XPS results confirmed the presence of Fe-2(SO4)(3) in the sulfated La0.7Sr0.3Co0.8Fe0.2O3 catalyst. The EXAFS results further revealed that the formation of Fe-2(SO4)(3) in the perovskite inhibited the sulfation of neighboring strontium from the viewpoint of the local atomic level. These findings strongly suggest that the La0.7Sr0.3Co0.8Fe0.2O3 perovskite is a possible NOx absorber used for aftertreament systems upon lean-burn engines with the advantages of the excellent NO oxidation ability, NOx storage capacity and the high sulfur tolerance. (C) 2013 Elsevier B.V. All rights reserved.; Herein, we reported the NOx storage capacity, NO oxidation ability and sulfur resistance of the La0.7Sr0.3CoO3-based perovskite-type catalysts. NO could be readily oxidized to NO2 with around 83% of NO-to-NO2 conversion at 300 degrees C over the perovskite. After sulfation, the NSC of the La0.7Sr0.3CoO3 catalyst calcined in static air decreased 58.0%. Nevertheless, a significant improvement of the sulfur tolerance could be achieved through partial substitution of Co with Fe cations, as well as calcination in flowing air. The NSC of the pre-sulfated La0.7Sr0.3Co0.8Fe0.2O3 catalyst maintained 360.7 mu mol/g and dropped only 6.4% as compared with the fresh one. The XPS results confirmed the presence of Fe-2(SO4)(3) in the sulfated La0.7Sr0.3Co0.8Fe0.2O3 catalyst. The EXAFS results further revealed that the formation of Fe-2(SO4)(3) in the perovskite inhibited the sulfation of neighboring strontium from the viewpoint of the local atomic level. These findings strongly suggest that the La0.7Sr0.3Co0.8Fe0.2O3 perovskite is a possible NOx absorber used for aftertreament systems upon lean-burn engines with the advantages of the excellent NO oxidation ability, NOx storage capacity and the high sulfur tolerance. (C) 2013 Elsevier B.V. All rights reserved. |
| 学科主题 | Chemistry; Engineering ; Chemistry; Engineering |
| 收录类别 | SCI |
| 电子版国际标准刊号 | 1873-3883 |
| 语种 | 英语 |
| WOS记录号 | WOS:000327904000004 ; WOS:000327904000004 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/224818]  |
| 专题 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Ma, AJ,Wang, SZ,Liu, C,et al. Effects of Fe dopants and residual carbonates on the catalytic activities of the perovskite-type La0.7Sr0.3Co1-xFexO3 NOx storage catalyst, Effects of Fe dopants and residual carbonates on the catalytic activities of the perovskite-type La0.7Sr0.3Co1-xFexO3 NOx storage catalyst[J]. APPLIED CATALYSIS B-ENVIRONMENTAL, APPLIED CATALYSIS B-ENVIRONMENTAL,2014, 2014,146, 146(SI):24-34, 24-34. |
| APA | Ma, AJ.,Wang, SZ.,Liu, C.,Xian, H.,Ding, Q.,...&郑黎荣.(2014).Effects of Fe dopants and residual carbonates on the catalytic activities of the perovskite-type La0.7Sr0.3Co1-xFexO3 NOx storage catalyst.APPLIED CATALYSIS B-ENVIRONMENTAL,146(SI),24-34. |
| MLA | Ma, AJ,et al."Effects of Fe dopants and residual carbonates on the catalytic activities of the perovskite-type La0.7Sr0.3Co1-xFexO3 NOx storage catalyst".APPLIED CATALYSIS B-ENVIRONMENTAL 146.SI(2014):24-34. |
入库方式： OAI收割
来源：高能物理研究所
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