Fe-substituted nanometric La0.9K0.1Co1-xFexO3-delta perovskite catalysts used for soot combustion, NOx storage and simultaneous catalytic removal of soot and NOx

	Fe-substituted nanometric La0.9K0.1Co1-xFexO3-delta perovskite catalysts used for soot combustion, NOx storage and simultaneous catalytic removal of soot and NOx
	Li, ZQ; Meng, M; Li, QA; Xie, YN; Hu, TD; Zhang, J; Xie YN(谢亚宁); Hu TD(胡天斗); Zhang J(张静)
刊名	CHEMICAL ENGINEERING JOURNAL
	2010
卷号	164 期号:1 页码:#REF!
关键词	Nanometric perovskite Fe-substitution NOx storage Soot combustion Simultaneous removal
通讯作者	Meng, M (reprint author), Tianjin Univ, Tianjin Key Lab Appl Catalysis Sci & Engn, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China.
英文摘要	A series of nanometric Fe-substituted La0.9K0.1Co1-xFexO3-delta (x = 0, 0.05, 0.1, 0.2, 0.3) perovskite catalysts were prepared by citric acid complexation, which show novel activity for diesel soot oxidation, NOx storage, and simultaneous NOx-soot removal. Their structures and physical-chemical properties were examined by XRD, BET, SEM, XPS and EXAFS techniques. In La0.9K0.1Co1-xFexO3-delta catalysts, the partial substitution of Co3+ by Fe3+ significantly enhances the catalytic activity towards soot oxidation or NOx storage and reduction. The catalyst La0.9K0.1Co0.9Fe0.1O3-delta shows the highest activity for simultaneous NOx-soot removal, over which the maximal soot oxidation rate is achieved at only 362 degrees C (T-m), the NOx storage capacity reaches 213 mu mol g(-1), and the percentage for NOx reduction by soot is 12.5%. Compared with the unsubstituted one (La0.9K0.1CoO3-delta), the activity enhancement of Fe-substituted samples results from the formation of high valence ion (Fe4+) at B-site, relative high content of surface lattice oxygen and the high concentration of NO2. Different from the widely accepted viewpoint that surface adsorbed oxygen species are responsible for soot combustion over perovskite catalysts, the surface lattice oxygen is identified as active oxygen species for soot combustion. (C) 2010 Elsevier B.V. All rights reserved.
学科主题	Engineering
类目[WOS]	Engineering, Environmental ; Engineering, Chemical
收录类别	SCI
WOS记录号	WOS:000283633700014
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/226126]
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,Li, QA,et al. Fe-substituted nanometric La0.9K0.1Co1-xFexO3-delta perovskite catalysts used for soot combustion, NOx storage and simultaneous catalytic removal of soot and NOx[J]. CHEMICAL ENGINEERING JOURNAL,2010,164(1):#REF!.
APA	Li, ZQ.,Meng, M.,Li, QA.,Xie, YN.,Hu, TD.,...&张静.(2010).Fe-substituted nanometric La0.9K0.1Co1-xFexO3-delta perovskite catalysts used for soot combustion, NOx storage and simultaneous catalytic removal of soot and NOx.CHEMICAL ENGINEERING JOURNAL,164(1),#REF!.
MLA	Li, ZQ,et al."Fe-substituted nanometric La0.9K0.1Co1-xFexO3-delta perovskite catalysts used for soot combustion, NOx storage and simultaneous catalytic removal of soot and NOx".CHEMICAL ENGINEERING JOURNAL 164.1(2010):#REF!.