In-situ fabrication of Ce-rich CeO2 nanocatalyst for efficient CO oxidation

doi:10.1016/j.jallcom.2019.04.057

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	In-situ fabrication of Ce-rich CeO2 nanocatalyst for efficient CO oxidation
	Liu, Xiaoyuan 1,2; Wang, Ke 1,2; Zhou, Yang 1,2; Zhang, Xinglai 2; Tang, Xinyue 1,2; Ren, Pengcheng 3; Jiang, Xin 2; Liu, Baodan 2
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2019-07-05
卷号	792 页码:644-651
关键词	CeO2 nanocrystal Plasma electrolytic oxidation In-situ growth CO oxidation
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2019.04.057
通讯作者	Liu, Baodan(baodanliu@hotmail.com)
英文摘要	Ceria is widely utilized in the field of CO catalysis due to its outstanding oxygen storage/release capacity (OSC/ORC). In this study, Ce precursor is successfully injected into the plasma electrolytic oxidation (PEO) film in silicate electrolyte through the addition of EDTA-2Na during PEO process. The atomic percentage (at. %) of Ce in PEO film can reach up to 14.80, which is the highest among all the related works. Annealing treatment in air ambient leads to the crystallization and oxidation reaction of Ce species, which mainly exist in the PEO film in amorphous phase and Ce-4.667(SiO4)(3)O. During the annealing process, CeO2 nanocrystals (similar to 100 nm) are generated under the confinement of amorphous SiO2 layer in PEO film. Subsequent etching treatment removes the amorphous SiO2 capping layer and triggers the catalytic activity of CeO2 nanocrystals. CO oxidation test reveals that these CeO2 nanocatalysts own remarkable catalytic activity in CO oxidation and show strong synergistic effect with noble metal (Au). This study establishes an efficient in-situ fabrication route for the preparation of highly active metal-supported ceria nanocatalysts with strong substrate adherence, showing overwhelming advantage compared with traditional catalyst preparation methods, which is promising for the direct integration of various oxide catalysts towards CO oxidation, TWCs, SCR, etc. (C) 2019 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[51702326] ; National Natural Science Foundation of China[51872296] ; Youth Innovation Promotion Association, Chinese Academy of Sciences[Y4NC711171] ; Basic Science Innovation Program of Shenyang National Laboratory for Materials Science[2017RP25]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000467235800074
资助机构	National Natural Science Foundation of China ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Basic Science Innovation Program of Shenyang National Laboratory for Materials Science
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/133254]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liu, Baodan
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 2.Chinese Acad Sci, IMR, Shenyang Natl Lab Mat Sci SYNL, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 3.Yantai Huaheng Energy Conservat Co Ltd, 32 Zhujiang Rd, Yantai 264006, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xiaoyuan,Wang, Ke,Zhou, Yang,et al. In-situ fabrication of Ce-rich CeO2 nanocatalyst for efficient CO oxidation[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,792:644-651.
APA	Liu, Xiaoyuan.,Wang, Ke.,Zhou, Yang.,Zhang, Xinglai.,Tang, Xinyue.,...&Liu, Baodan.(2019).In-situ fabrication of Ce-rich CeO2 nanocatalyst for efficient CO oxidation.JOURNAL OF ALLOYS AND COMPOUNDS,792,644-651.
MLA	Liu, Xiaoyuan,et al."In-situ fabrication of Ce-rich CeO2 nanocatalyst for efficient CO oxidation".JOURNAL OF ALLOYS AND COMPOUNDS 792(2019):644-651.