Diesel soot elimination over potassium-promoted Co3O4 nanowires monolithic catalysts under gravitation contact mode

doi:10.1016/j.apcatb.2017.06.035

	Diesel soot elimination over potassium-promoted Co3O4 nanowires monolithic catalysts under gravitation contact mode
	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
	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
内容类型	期刊论文
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
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.