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Effects of cerium incorporation on the catalytic oxidation of benzene over flame-made perovskite La1-xCexMnO3 catalysts
Liu, Gang1,2; Li, Jiaqi1,2; Yang, Kun1; Tang, Wenxiang1,2; Liu, Haidi1; Yang, Jun1; Yue, Renliang1; Chen, Yunfa1
2015-04-01
Source PublicationPARTICUOLOGY
ISSN1674-2001
Volume19Issue:APRPages:60-68
Abstract

Perovskite-type La1-xCexMnO3 (x=0-10%) catalysts were prepared by flame spray pyrolysis and their activities during the catalytic oxidation of benzene were examined over the temperature range of 100-450 degrees C. The structural properties and reducibility of these materials were also characterized by X-ray diffraction (XRD), N-2 adsorption/desorption, H-2 temperature-programmed reduction (H-2-TPR) and X-ray photoelectron spectroscopy (XPS). The incorporation of Ce was found to improve the benzene oxidation activity, and the perovskite in which x was 0.1 exhibited the highest activity. Phase composition and surface elemental analyses indicated that non-stoichiometric compounds were present. The incorporation of Ce had a negligible effect on the specific surface area of the perovskites and hence this factor has little impact on the catalytic activity. Introduction of Ce4+ resulted in modification of the chemical states of both B-site ions and oxygen species and facilitated the reducibility of the perovskite. The surface Mn4+/Mn3+ ratio was increased as a result of Ce4+ substitution, while a decrease in the surface-adsorbed O/lattice O (Oa(ds)/O-latt) ratio was observed. The relationship between the surface elemental ratios and catalytic activity was established to allow a better understanding of the process by which benzene is oxidized over perovskites. (C) 2014 Published by Elsevier B.V. on behalf of Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences.

KeywordPerovskite Benzene Elimination Ce Substitution Flame Spray Pyrolysis Charge Neutralization
SubtypeArticle
Subject AreaEngineering ; Materials Science
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.partic.2014.07.001
Indexed BySCI
Language英语
WOS KeywordSpray-pyrolysis ; Surface-properties ; Lamno3 Perovskite ; Methane Combustion ; Thermal-stability ; Vocs Combustion ; Oxides ; Mn ; Performance ; Substitution
Funding ProjectNational High Technology Research and Development Program of China [2012AA062702, 2010AA064903] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB05050300] ; National Natural Science Foundation of China [21306199] ; Instrument Developing Project of the Chinese Academy of Sciences [YZ200722] ; 12th Five-years National Key Technology RD Program [2012BAJ02B03, 2012BAJ02B07]
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Chemical ; Materials Science, Multidisciplinary
WOS IDWOS:000352750900008
Citation statistics
Cited Times:41[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/13788
Collection研究所(批量导入)
Corresponding AuthorChen, Yunfa
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Liu, Gang,Li, Jiaqi,Yang, Kun,et al. Effects of cerium incorporation on the catalytic oxidation of benzene over flame-made perovskite La1-xCexMnO3 catalysts[J]. PARTICUOLOGY,2015,19(APR):60-68.
APA Liu, Gang.,Li, Jiaqi.,Yang, Kun.,Tang, Wenxiang.,Liu, Haidi.,...&Chen, Yunfa.(2015).Effects of cerium incorporation on the catalytic oxidation of benzene over flame-made perovskite La1-xCexMnO3 catalysts.PARTICUOLOGY,19(APR),60-68.
MLA Liu, Gang,et al."Effects of cerium incorporation on the catalytic oxidation of benzene over flame-made perovskite La1-xCexMnO3 catalysts".PARTICUOLOGY 19.APR(2015):60-68.
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