CAS OpenIR
Catalytic Behaviour of Flame-Made CuO-CeO2 Nanocatalysts in Efficient CO Oxidation
Zhao, Feng1,2; Li, Shuangde1; Wu, Xiaofeng1; Yue, Renliang1; Li, Weiman1,2; Zha, Xicuo1,2; Deng, Yuzhou1,2; Chen, Yunfa1,3
2019-03-01
Source PublicationCATALYSTS
ISSN2073-4344
Volume9Issue:3Pages:17
AbstractCuO-CeO2 nanocatalysts with varying CuO contents (1, 5, 9, 14 and 17 wt %) were prepared by one-step flame spray pyrolysis (FSP) and applied to CO oxidation. The influences of CuO content on the as-prepared catalysts were systematically characterized by X-ray diffraction (XRD), N-2 adsorption-desorption at -196 degrees C, field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and hydrogen-temperature programmed reduction (H-2-TPR). A superior CO oxidation activity was observed for the 14 wt % CuO-CeO2 catalyst, with 90% CO conversion at 98 degrees C at space velocity (60,000 mL x g(-1) x h(-1)), which was attributed to abundant surface defects (lattice distortion, Ce3+, and oxygen vacancies) and high reducibility supported by strong synergistic interaction. In addition, the catalyst also displayed excellent stability and resistance to water vapor. Significantly, in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) showed that in the CO catalytic oxidation process, the strong synergistic interaction led readily to dehydroxylation and CO adsorption on Cu+ at low temperature. Furthermore, in the feed of water vapor, although there was an adverse effect on the access of CO adsorption, there was also a positive effect on the formation of fewer carbon intermediates. All these results showed the potential of highly active and water vapor-resistive CuO-CeO2 catalysts prepared by FSP.
Keywordflame spray pyrolysis synergistic interaction CO oxidation CuO-CeO2 nanocatalyst water resistance carbon intermediate
DOI10.3390/catal9030256
Language英语
WOS KeywordCARBON-MONOXIDE ; PREFERENTIAL OXIDATION ; CUO/CEO2 CATALYSTS ; OXIDE COMPOSITE ; EXCESS HYDROGEN ; OXYGEN VACANCY ; MIXED OXIDES ; CERIA ; REDUCTION ; BENZENE
Funding ProjectNational Key Research and Development Program of China[2016YFC0204903] ; National Key Research and Development Program of China[2016YFC0207100] ; National Key Research and Development Program of China[2017YFC0702705] ; National Key Research and Development Program of China[2017YFC0211503] ; National Natural Science Foundation of China[51672273] ; Open Research Fund of State Key Laboratory of Multi-phase Complex Systems[MPCS-2017-D-06] ; National Hi-tech Research and Development Program of China (863 Program)[2012AA062702]
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China ; Open Research Fund of State Key Laboratory of Multi-phase Complex Systems ; National Hi-tech Research and Development Program of China (863 Program)
WOS IDWOS:000465012800040
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28306
Collection中国科学院过程工程研究所
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
3.Chinese Acad Sci, Ctr Excellence Reg Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China
Recommended Citation
GB/T 7714
Zhao, Feng,Li, Shuangde,Wu, Xiaofeng,et al. Catalytic Behaviour of Flame-Made CuO-CeO2 Nanocatalysts in Efficient CO Oxidation[J]. CATALYSTS,2019,9(3):17.
APA Zhao, Feng.,Li, Shuangde.,Wu, Xiaofeng.,Yue, Renliang.,Li, Weiman.,...&Chen, Yunfa.(2019).Catalytic Behaviour of Flame-Made CuO-CeO2 Nanocatalysts in Efficient CO Oxidation.CATALYSTS,9(3),17.
MLA Zhao, Feng,et al."Catalytic Behaviour of Flame-Made CuO-CeO2 Nanocatalysts in Efficient CO Oxidation".CATALYSTS 9.3(2019):17.
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