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
学科分类Engineering
DOI10.1016/j.cej.2010.08.036
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.
文章类型Article
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.
类目[WOS]Engineering, Environmental ; Engineering, Chemical
收录类别SCI
WOS记录号WOS:000283633700014
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被引频次:44[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226126
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
中国科学院高能物理研究所_多学科研究中心
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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!.
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