Diesel soot elimination over potassium-promoted Co3O4 nanowires monolithic catalysts under gravitation contact mode
文献类型：期刊论文
| 作者 | Zheng LR(郑黎荣) ; Cao, CM; Xing, LL; Yang, YX; Tian, Y; Ding, T; Zhang, J; Hu, TD; Zheng, LR; Li, XG
|
| 刊名 | APPLIED CATALYSIS B-ENVIRONMENTAL
 |
| 出版日期 | 2017 |
| 卷号 | 218页码:32-45 |
| 关键词 | Co3O4 nanowires Monolithic catalysts Soot combustion Gravitational contact mode Potassium |
| ISSN号 | 0926-3373 |
| DOI | 10.1016/j.apcatb.2017.06.035 |
| 文献子类 | Article |
| 英文摘要 | Herein, we report the high catalytic activity of the potassium-promoted Co3O4 nanowires supported on the monolithic three-dimensional macroporous (3-DM) nickel foam substrate (xKCo-NW) for soot combustion. The 3-DM structure of Ni foam and the space among these nanowires can extremely improve the contact efficiency between soot and catalysts. Loading of potassium provides the new active sites for soot oxidation, improves catalyst-soot contact as a molten salt and increases the number of the surface adsorbed oxygen species. The 5KCo-NW catalyst loaded with 5% potassium shows the highest catalytic performance, as well as a high water resistance. There are two types of potassium species in the catalysts, most potassium species is in the form of separate phases, and few interacts with cobalt oxide. The interaction between potassium species and cobalt oxide stabilizes a part of potassium species, and the stabilized potassium species can promote the catalytic activity for the consecutive soot combustion cycle. Moreover, our results show that the chemisorbed NOx species on the 5KCo-NW catalyst are more active than the gaseous NO2 for soot oxidation. In the presence of O-2, soot combustion is accelerated to react with the chemisorbed NOx species; whereas the formed nitrate/nitrite species are catalytically inert. (C) 2017 Elsevier B.V. All rights reserved. |
| 电子版国际标准刊号 | 1873-3883 |
| WOS关键词 | PARTICULATE MATTER OXIDATION ; HIGHLY-ACTIVE CATALYSTS ; NOX STORAGE ; ARRAY CATALYST ; LNT-CATALYSTS ; MIXED OXIDES ; STORED NOX ; COMBUSTION ; REMOVAL ; PEROVSKITE |
| WOS研究方向 | Chemistry ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000407983000004 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/285256]  |
| 专题 | 高能物理研究所_多学科研究中心 高能物理研究所_实验物理中心 高能物理研究所_管理与技术支持 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Zheng LR,Cao, CM,Xing, LL,et al. Diesel soot elimination over potassium-promoted Co3O4 nanowires monolithic catalysts under gravitation contact mode[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2017,218:32-45. |
| APA | 郑黎荣.,Cao, CM.,Xing, LL.,Yang, YX.,Tian, Y.,...&胡天斗.(2017).Diesel soot elimination over potassium-promoted Co3O4 nanowires monolithic catalysts under gravitation contact mode.APPLIED CATALYSIS B-ENVIRONMENTAL,218,32-45. |
| MLA | 郑黎荣,et al."Diesel soot elimination over potassium-promoted Co3O4 nanowires monolithic catalysts under gravitation contact mode".APPLIED CATALYSIS B-ENVIRONMENTAL 218(2017):32-45. |
入库方式： OAI收割
来源：高能物理研究所
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