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Promoted VOC oxidation over homogeneous porous CoxNiAlO composite oxides derived from hydrotalcites: effect of preparation method and doping
Li, Shuangde1; Mo, Shengpeng1,2; Li, Jiaqi1; Liu, Haidi1; Chen, Yunfa1
2016
Source PublicationRSC ADVANCES
ISSN2046-2069
Volume6Issue:62Pages:S6874-S6884
AbstractHomogeneous porous and curve plated CoxNiAlO composite metal oxide catalysts are obtained from the thermal decomposition of CoxNiAl-layered double hydroxide (LDH) precursors, which are prepared by urea co-precipitation with surfactant, followed by a hydrothermal treatment. The as-prepared samples were characterized by XRD, BET, SEM, TEM, H-2-TPR and XPS. The Co3AlO sample shows 90% benzene conversion (T-90) at 236 degrees C at a high space velocity (SV = 60 000 mL g(-1) h(-1)), and possesses much higher activity than Co3AlO prepared with NaOH co-precipitation without surfactant, with T-90 = 288 degrees C. This is mainly correlated with the narrower pore size (2.9 vs. 17.2 nm) and lower temperature reducibility (319 vs. 360 degrees C). The Co2NiAlO sample exhibits enhanced activity at T-90 = 227 degrees C with the low activation energy of 39.0 kJ mol(-1), and its lower temperature reducibility is ascribed to the larger amount of surface accessible Co3+. The Co2NiAlO sample owns good reproducibility and superior reversibility and long stability with prolonged time on benzene stream in the presence of 3.5% water vapor. Moreover, a monolithic Co2NiAlO film catalyst is fabricated by the thermal decomposition of an LDH film precursor through an in situ growth methodology, with a high reaction rate of 1.21 mmol g(-1) h(-1) under T-90 = 275 degrees C.
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1039/c6ra08394c
Indexed BySCI
Language英语
WOS KeywordLAYERED DOUBLE HYDROXIDES ; CATALYTIC PERFORMANCE ; AL HYDROTALCITE ; CO OXIDATION ; METAL OXIDES ; NANOPARTICLES ; STABILITY ; REMOVAL ; BENZENE ; TOLUENE
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China(21401200) ; strategic project of science and technology of Chinese Academy of Sciences(XDB05050000) ; National Key Technology Support Program(2014BAC21B)
WOS IDWOS:000378755200019
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21247
Collection多相复杂系统国家重点实验室
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
Li, Shuangde,Mo, Shengpeng,Li, Jiaqi,et al. Promoted VOC oxidation over homogeneous porous CoxNiAlO composite oxides derived from hydrotalcites: effect of preparation method and doping[J]. RSC ADVANCES,2016,6(62):S6874-S6884.
APA Li, Shuangde,Mo, Shengpeng,Li, Jiaqi,Liu, Haidi,&Chen, Yunfa.(2016).Promoted VOC oxidation over homogeneous porous CoxNiAlO composite oxides derived from hydrotalcites: effect of preparation method and doping.RSC ADVANCES,6(62),S6874-S6884.
MLA Li, Shuangde,et al."Promoted VOC oxidation over homogeneous porous CoxNiAlO composite oxides derived from hydrotalcites: effect of preparation method and doping".RSC ADVANCES 6.62(2016):S6874-S6884.
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