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Catalytic Behaviour of Flame-Made CuO-CeO2 Nanocatalysts in Efficient CO Oxidation

文献类型：期刊论文

作者Zhao, Feng1,2; Li, Shuangde1; Wu, Xiaofeng1; Yue, Renliang1; Li, Weiman1,2; Zha, Xicuo1,2; Deng, Yuzhou1,2; Chen, Yunfa1,3
刊名CATALYSTS
出版日期2019-03-01
卷号9期号:3页码:17
关键词flame spray pyrolysis synergistic interaction CO oxidation CuO-CeO2 nanocatalyst water resistance carbon intermediate
ISSN号2073-4344
DOI10.3390/catal9030256
英文摘要CuO-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.
WOS关键词CARBON-MONOXIDE ; PREFERENTIAL OXIDATION ; CUO/CEO2 CATALYSTS ; OXIDE COMPOSITE ; EXCESS HYDROGEN ; OXYGEN VACANCY ; MIXED OXIDES ; CERIA ; REDUCTION ; BENZENE
资助项目National 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研究方向Chemistry
语种英语
WOS记录号WOS:000465012800040
出版者MDPI
资助机构National 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)
源URL[http://ir.ipe.ac.cn/handle/122111/28306]  
专题中国科学院过程工程研究所
通讯作者Chen, Yunfa
作者单位1.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
推荐引用方式
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.

入库方式： OAI收割

来源：过程工程研究所

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