A series of ceria supported lean-burn NOx trap catalysts LaCoO3/K2CO3/CeO2 using perovskite as active component
文献类型：期刊论文
| 作者 | You, R; Zhang, YX; Liu, DS; Meng, M; Jiang, Z; Zhang, S; Huang, YY |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2015 |
| 卷号 | 260页码:357—367 |
| 关键词 | LEAN/RICH ATMOSPHERES REDUCTION CATALYST LACOO3 PEROVSKITE ELEMENTARY STEPS STORAGE ADSORPTION OXIDES OXIDATION EXHAUST PT/K/TIO2-ZRO2 |
| 英文摘要 | A series of ceria supported perovskite-based lean-burn NOx trap (LNT) catalysts 10 wt.% LaCoO3/xK(2)CO(3)/CeO2 (denoted as L/xK/C, x = 1, 3, 5, 8 wt.%) were prepared by successive impregnation. They display excellent performance for NOx storage and reduction, especially the one with 3% K2CO3. The formation of supported perovskite LaCoO3 on CeO2 is confirmed by XAFS characterization. The results of XPS and O-2-TPD reveal that the supported perovskite LaCoO3 contains considerable amounts of surface adsorbed oxygen, which are responsible for NO to NO2 oxidation during NOx storage. The catalyst L/3K/C exhibits fast and complete NOx trapping in lean condition, showing little NOx leak for long time, over which a particularly high NOx reduction percentage (97.7%) and NOx to N-2 selectivity (98.5%) are simultaneously achieved in cyclic lean/rich atmospheres. FT-IR and CO2-TPD results demonstrate the diversity of K species including -OK groups, dispersed surface K2CO3 species and bulk or bulk-like K2CO3 species. The dispersion and states of K species show big impact on NOx storage pathways. In situ DRIFTS results indicate that on L/xK/C NOx is stored as diverse nitrates without evident nitrite species detected during NOx adsorption and storage, which further verifies their excellent oxidation ability. (C) 2014 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2015-12-24 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/24385]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 推荐引用方式 GB/T 7714 | You, R,Zhang, YX,Liu, DS,et al. A series of ceria supported lean-burn NOx trap catalysts LaCoO3/K2CO3/CeO2 using perovskite as active component[J]. CHEMICAL ENGINEERING JOURNAL,2015,260:357—367. |
| APA | You, R.,Zhang, YX.,Liu, DS.,Meng, M.,Jiang, Z.,...&Huang, YY.(2015).A series of ceria supported lean-burn NOx trap catalysts LaCoO3/K2CO3/CeO2 using perovskite as active component.CHEMICAL ENGINEERING JOURNAL,260,357—367. |
| MLA | You, R,et al."A series of ceria supported lean-burn NOx trap catalysts LaCoO3/K2CO3/CeO2 using perovskite as active component".CHEMICAL ENGINEERING JOURNAL 260(2015):357—367. |
入库方式： OAI收割
来源：上海应用物理研究所
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