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MnOx-CeO2 supported on a three-dimensional and networked SBA-15 monolith for NOx-assisted soot combustion
Alternative TitleRSC Adv.
Zhang, Hui1,2; Gu, Fangna2; Liu, Qing2; Gao, Jiajian2; Jia, Lihua1; Zhu, Tingyu2; Chen, Yunfa2; Zhong, Ziyi3; Su, Fabing2
2014
Source PublicationRSC ADVANCES
ISSN2046-2069
Volume4Issue:29Pages:14879-14889
AbstractThis paper reports the preparation and characterization of MnOx-CeO2/SBA-15 monolith (MnCe/SM) catalysts for NOx-assisted soot combustion. The SM with a three-dimensional (3D) network structure was synthesized by a sol-gel method, in which the shearing force and the acidity of the solution were finely tuned to direct the formation and assembly of the primary particles. The MnCe/SM catalysts were further prepared by a facile isovolumetric impregnation method. The samples were characterized by nitrogen adsorption, scanning electron microscopy, energy dispersed spectroscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, H-2 temperature-programmed reduction, O-2 temperature-programmed desorption, NO temperature-programmed desorption, and NO temperature-programmed oxidation. It is found that the MnOx-CeO2 nanoparticles were dispersed in the channels or/and on the outer surface of the SM support depending on the loading, and had a strong synergistic effect. The MnCe/SM catalysts with an appropriate MnOx-CeO2 loading showed much higher catalytic performance for soot combustion than that of the unsupported MnOx-CeO2 mixture. This is attributed to the combination of the MnOx-CeO2 active component with the 3D network structure of SM. The later not only provides large surface area and high accessibility for the soot particulates to the active sites, but also acts as a particulate filter.; This paper reports the preparation and characterization of MnOx-CeO2/SBA-15 monolith (MnCe/SM) catalysts for NOx-assisted soot combustion. The SM with a three-dimensional (3D) network structure was synthesized by a sol-gel method, in which the shearing force and the acidity of the solution were finely tuned to direct the formation and assembly of the primary particles. The MnCe/SM catalysts were further prepared by a facile isovolumetric impregnation method. The samples were characterized by nitrogen adsorption, scanning electron microscopy, energy dispersed spectroscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, H-2 temperature-programmed reduction, O-2 temperature-programmed desorption, NO temperature-programmed desorption, and NO temperature-programmed oxidation. It is found that the MnOx-CeO2 nanoparticles were dispersed in the channels or/and on the outer surface of the SM support depending on the loading, and had a strong synergistic effect. The MnCe/SM catalysts with an appropriate MnOx-CeO2 loading showed much higher catalytic performance for soot combustion than that of the unsupported MnOx-CeO2 mixture. This is attributed to the combination of the MnOx-CeO2 active component with the 3D network structure of SM. The later not only provides large surface area and high accessibility for the soot particulates to the active sites, but also acts as a particulate filter.
KeywordPerovskite-type Oxides Ceria-based Oxides Diesel Soot Mixed Oxides Simultaneous Removal Catalytic-oxidation Low-temperature Adsorption Reduction Property
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1039/c3ra47749e
URL查看原文
Indexed BySCI
Language英语
WOS KeywordPEROVSKITE-TYPE OXIDES ; CERIA-BASED OXIDES ; DIESEL SOOT ; MIXED OXIDES ; SIMULTANEOUS REMOVAL ; CATALYTIC-OXIDATION ; LOW-TEMPERATURE ; ADSORPTION ; REDUCTION ; PROPERTY
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
WOS IDWOS:000333528900011
Citation statistics
Cited Times:39[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/8141
Collection研究所(批量导入)
Affiliation1.Qiqihar Univ, Coll Chem & Chem Engn, Qiqihar 161006, Heilongjiang, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
3.ASTAR, Inst Chem Engn & Sci, Jurong Isl 627833, Singapore
Recommended Citation
GB/T 7714
Zhang, Hui,Gu, Fangna,Liu, Qing,et al. MnOx-CeO2 supported on a three-dimensional and networked SBA-15 monolith for NOx-assisted soot combustion[J]. RSC ADVANCES,2014,4(29):14879-14889.
APA Zhang, Hui.,Gu, Fangna.,Liu, Qing.,Gao, Jiajian.,Jia, Lihua.,...&Su, Fabing.(2014).MnOx-CeO2 supported on a three-dimensional and networked SBA-15 monolith for NOx-assisted soot combustion.RSC ADVANCES,4(29),14879-14889.
MLA Zhang, Hui,et al."MnOx-CeO2 supported on a three-dimensional and networked SBA-15 monolith for NOx-assisted soot combustion".RSC ADVANCES 4.29(2014):14879-14889.
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