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

doi:10.3390/catal9030256

	Catalytic Behaviour of Flame-Made CuO-CeO2 Nanocatalysts in Efficient CO Oxidation
	Zhao, Feng 1,2; Li, Shuangde 1; Wu, Xiaofeng 1; Yue, Renliang 1; Li, Weiman 1,2; Zha, Xicuo 1,2; Deng, Yuzhou1,2 ; Chen, Yunfa 1,3
刊名	CATALYSTS
	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
DOI	10.3390/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.
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关键词	CARBON-MONOXIDE ; PREFERENTIAL OXIDATION ; CUO/CEO2 CATALYSTS ; OXIDE COMPOSITE ; EXCESS HYDROGEN ; OXYGEN VACANCY ; MIXED OXIDES ; CERIA ; REDUCTION ; BENZENE
WOS研究方向	Chemistry
语种	英语
出版者	MDPI
WOS记录号	WOS:000465012800040
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)
内容类型	期刊论文
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.