Highly efficient multifunctional dually-substituted perovskite catalysts La1-xKxCo1-yCuyO3-delta used for soot combustion, NOx storage and simultaneous NOx-soot removal
文献类型：期刊论文
| ; | |
| 作者 | Li, ZQ; Meng, M; Zha, YQ; Dai, FF; Hu, TD; Xie, YN; Zhang, J; Hu TD(胡天斗) ; Xie YN(谢亚宁); Zhang J(张静)
|
| 刊名 | APPLIED CATALYSIS B-ENVIRONMENTAL
 ; APPLIED CATALYSIS B-ENVIRONMENTAL
|
| 出版日期 | 2012 ; 2012 |
| 卷号 | 121页码:65-74 |
| 关键词 | Soot combustion NOx reduction Perovskite Dual substitution Mechanism Soot combustion NOx reduction Perovskite Dual substitution Mechanism |
| DOI | 10.1016/j.apcatb.2012.03.022 |
| 英文摘要 | A series K/Cu simultaneously substituted nanometric perovskite catalysts La1-xKxCo1-yCuyO3-delta (x = 0, 0.1; y = 0, 0.05, 0.1, 0.2, 0.3) were synthesized by citric acid complexation, which were employed for soot combustion, NOx storage and simultaneous NOx-soot removal. The physico-chemical properties of the catalysts were characterized by XRD, FT-IR, EXAFS, SEM, H-2-TPR, Soot-TPR, TG/DTA, XPS and in situ DRIFTS techniques. When K and Cu are simultaneously introduced into LaCoO3, soot combustion is largely accelerated, decreasing the characteristic temperature (T-m) corresponding to the maximal soot combustion rate at least 80 degrees C; moreover, NOx reduction by soot is also remarkably facilitated. Among all the catalysts La0.9K0.1Co0.9Cu0.1O3-delta shows the lowest T-m of 360 degrees C, the highest NOx storage capacity (NSC) of 284 mu mol g(-1) and the largest NOx reduction percentage of 32%; for soot combustion, it also exhibits the lowest activation energy (80.04 kJ mol(-1)). The XPS and Soot-TPR results reveal that the catalyst La0.9K0.1Co0.9Cu0.1O3-delta possesses more active and larger amount of surface oxygen species (O-2(-) and O-), more tetravalent cobalt ions and better reducibility than others, which determines its better catalytic performance. Based on in situ DRIFTS and other characterization results, the potential mechanisms for soot combustion, NOx storage and simultaneous NOx-soot removal are proposed. (c) 2012 Elsevier B.V. All rights reserved.; A series K/Cu simultaneously substituted nanometric perovskite catalysts La1-xKxCo1-yCuyO3-delta (x = 0, 0.1; y = 0, 0.05, 0.1, 0.2, 0.3) were synthesized by citric acid complexation, which were employed for soot combustion, NOx storage and simultaneous NOx-soot removal. The physico-chemical properties of the catalysts were characterized by XRD, FT-IR, EXAFS, SEM, H-2-TPR, Soot-TPR, TG/DTA, XPS and in situ DRIFTS techniques. When K and Cu are simultaneously introduced into LaCoO3, soot combustion is largely accelerated, decreasing the characteristic temperature (T-m) corresponding to the maximal soot combustion rate at least 80 degrees C; moreover, NOx reduction by soot is also remarkably facilitated. Among all the catalysts La0.9K0.1Co0.9Cu0.1O3-delta shows the lowest T-m of 360 degrees C, the highest NOx storage capacity (NSC) of 284 mu mol g(-1) and the largest NOx reduction percentage of 32%; for soot combustion, it also exhibits the lowest activation energy (80.04 kJ mol(-1)). The XPS and Soot-TPR results reveal that the catalyst La0.9K0.1Co0.9Cu0.1O3-delta possesses more active and larger amount of surface oxygen species (O-2(-) and O-), more tetravalent cobalt ions and better reducibility than others, which determines its better catalytic performance. Based on in situ DRIFTS and other characterization results, the potential mechanisms for soot combustion, NOx storage and simultaneous NOx-soot removal are proposed. (c) 2012 Elsevier B.V. All rights reserved. |
| 学科主题 | Chemistry; Engineering ; Chemistry; Engineering |
| 收录类别 | SCI |
| WOS记录号 | WOS:000305502200008 ; WOS:000305502200008 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/223814]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 推荐引用方式 GB/T 7714 | Li, ZQ,Meng, M,Zha, YQ,et al. Highly efficient multifunctional dually-substituted perovskite catalysts La1-xKxCo1-yCuyO3-delta used for soot combustion, NOx storage and simultaneous NOx-soot removal, Highly efficient multifunctional dually-substituted perovskite catalysts La1-xKxCo1-yCuyO3-delta used for soot combustion, NOx storage and simultaneous NOx-soot removal[J]. APPLIED CATALYSIS B-ENVIRONMENTAL, APPLIED CATALYSIS B-ENVIRONMENTAL,2012, 2012,121, 121:65-74, 65-74. |
| APA | Li, ZQ.,Meng, M.,Zha, YQ.,Dai, FF.,Hu, TD.,...&张静.(2012).Highly efficient multifunctional dually-substituted perovskite catalysts La1-xKxCo1-yCuyO3-delta used for soot combustion, NOx storage and simultaneous NOx-soot removal.APPLIED CATALYSIS B-ENVIRONMENTAL,121,65-74. |
| MLA | Li, ZQ,et al."Highly efficient multifunctional dually-substituted perovskite catalysts La1-xKxCo1-yCuyO3-delta used for soot combustion, NOx storage and simultaneous NOx-soot removal".APPLIED CATALYSIS B-ENVIRONMENTAL 121(2012):65-74. |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。