The monolithic transition metal oxide crossed nanosheets used for diesel soot combustion under gravitational contact mode

doi:10.1016/j.apsusc.2017.02.117

	The monolithic transition metal oxide crossed nanosheets used for diesel soot combustion under gravitational contact mode
	Zhang, J; Hu, TD; Ding, T; Tian, Y; Yang, YX; Xing, LL; Cao, CM; Zheng LR(郑黎荣); Hu TD(胡天斗); Zhang J(张静)
刊名	APPLIED SURFACE SCIENCE
	2017
卷号	406 页码:245-253
关键词	Transition metal oxides Nanosheets Three-dimensionally macroporous Ni foam Soot combustion Crossed macropores
ISSN号	0169-4332
DOI	10.1016/j.apsusc.2017.02.117
文献子类	Article
英文摘要	Crossed nanosheets of transition metal oxide (TMO-NS: Co-NS, Mn-NS and Fe-NS) were synthesized by a facile hydrothermal method and employed for soot combustion in the NO/O-2/N-2 and O-2/N-2 atmosphere under gravitational contact mode (GCM). They show high catalytic activities for soot combustion due to the macroporous structure of the as-prepare catalysts increasing the soot-catalyst contact efficiency. The XRD and XPS results reveal that the active phases in the corresponding catalysts exist as Co3O4, Mn2O3 and Fe2O3, respectively. Among these catalysts, the Co-NS shows the best activity for soot combustion, especially in the presence of NO, whose catalytic activity of T-50 (391 degrees C) and S-CO2 (100%) is as good as that of the Pt/Al2O3 catalyst. The excellent performance of the Co-NS catalyst results from several factors: the highest intrinsic activity (TOF = 1.77 x 10(-5) s(-1)); the highest redox property as revealed by H-2-TPR and soot-TPR; the largest amount of active oxygen species as clarified by XPS; the highest ability of NO oxidation to NO2 supported by NO-TPO. In addition, the multiporous structure of Co3O4 nanosheets is facilitated for the mass transfer. In the O-2 atmosphere, soot particulates are directly oxidized by the surface adsorbed oxygen. After introducing of NO, the soot particulates are readily oxidized by NO2 at the low temperature (< 330 degrees C); with the increase of the reaction temperature (330-450 degrees C), both the active oxygen species and NO2 involve in soot combustion. (C) 2017 Elsevier B.V. All rights reserved.
电子版国际标准刊号	1873-5584
WOS关键词	CARBON-MONOXIDE OXIDATION ; CATALYTIC PERFORMANCE ; ARRAY CATALYST ; NOX STORAGE ; GOLD NANOPARTICLES ; NANOPOROUS WALLS ; CEO2 NANOCUBES ; ORGANIC-DYES ; REMOVAL ; PEROVSKITE
WOS研究方向	Chemistry ; Materials Science ; Physics
语种	英语
WOS记录号	WOS:000398011600031
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284729]
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	Zhang, J,Hu, TD,Ding, T,et al. The monolithic transition metal oxide crossed nanosheets used for diesel soot combustion under gravitational contact mode[J]. APPLIED SURFACE SCIENCE,2017,406:245-253.
APA	Zhang, J.,Hu, TD.,Ding, T.,Tian, Y.,Yang, YX.,...&Zheng, LR.(2017).The monolithic transition metal oxide crossed nanosheets used for diesel soot combustion under gravitational contact mode.APPLIED SURFACE SCIENCE,406,245-253.
MLA	Zhang, J,et al."The monolithic transition metal oxide crossed nanosheets used for diesel soot combustion under gravitational contact mode".APPLIED SURFACE SCIENCE 406(2017):245-253.