| Diesel soot elimination over potassium-promoted Co3O4 nanowires monolithic catalysts under gravitation contact mode | |
Cao, CM; Xing, LL; Yang, YX; Tian, Y; Ding, T; Zhang, J ; Hu, TD; Zheng, LR; Li, XG; Zhang J(张静); Hu TD(胡天斗); Zheng LR(郑黎荣)
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| 2017 | |
| Source Publication | APPLIED CATALYSIS B-ENVIRONMENTAL
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| ISSN | 0926-3373 |
| EISSN | 1873-3883 |
| Volume | 218Pages:32-45 |
| Subtype | Article |
| Abstract | 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. |
| Keyword | Co3O4 nanowires Monolithic catalysts Soot combustion Gravitational contact mode Potassium |
| DOI | 10.1016/j.apcatb.2017.06.035 |
| WOS Keyword | PARTICULATE MATTER OXIDATION ; HIGHLY-ACTIVE CATALYSTS ; NOX STORAGE ; ARRAY CATALYST ; LNT-CATALYSTS ; MIXED OXIDES ; STORED NOX ; COMBUSTION ; REMOVAL ; PEROVSKITE |
| Indexed By | SCI ; EI ; SCOPUS |
| Language | 英语 |
| WOS Research Area | Chemistry ; Engineering |
| WOS Subject | Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical |
| WOS ID | WOS:000407983000004 |
| EI Accession Number | 20172603811465 |
| EI Keywords | Chemisorption - Cobalt compounds - Combustion - Dust - Nanocatalysts - Nanowires - Nitrogen oxides - Potassium - Potassium compounds - Soot |
| EI Classification Number | 451.1 Air Pollution Sources - 549.1 Alkali Metals - 761 Nanotechnology - 802.2 Chemical Reactions - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 933 Solid State Physics |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ihep.ac.cn/handle/311005/285256 |
| Collection | 多学科研究中心 实验物理中心 |
| Affiliation | 中国科学院高能物理研究所 |
| First Author Affilication | Institute of High Energy |
| Recommended Citation GB/T 7714 | Cao, CM,Xing, LL,Yang, YX,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 | Cao, CM.,Xing, LL.,Yang, YX.,Tian, Y.,Ding, T.,...&郑黎荣.(2017).Diesel soot elimination over potassium-promoted Co3O4 nanowires monolithic catalysts under gravitation contact mode.APPLIED CATALYSIS B-ENVIRONMENTAL,218,32-45. |
| MLA | Cao, CM,et al."Diesel soot elimination over potassium-promoted Co3O4 nanowires monolithic catalysts under gravitation contact mode".APPLIED CATALYSIS B-ENVIRONMENTAL 218(2017):32-45. |
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