Tailoring the surface structures of iron oxide nanorods to support Au nanoparticles for CO oxidation

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	Tailoring the surface structures of iron oxide nanorods to support Au nanoparticles for CO oxidation
	Shi, Wen 1,3; Gao, Tongtong 1,2; Zhang, Liyun 1; Ma, Yanshuang 1; Liu, Zhongwen 2; Zhang, Bingsen 1
刊名	CHINESE JOURNAL OF CATALYSIS
	2019-12-01
卷号	40 期号:12 页码:1884-1894
关键词	Iron oxide nanorods Surface property Au nanoparticle CO oxidation Structure evolution
ISSN号	0253-9837
通讯作者	Liu, Zhongwen(zwliu@snnu.edu.cn) ; Zhang, Bingsen(bszhang@imr.ac.cn)
英文摘要	Iron oxide supported Au nanomaterials are one of the most studied catalysts for low-temperature CO oxidation. Catalytic performance not only critically depends on the size of the supported Au nanoparticles (NPs) but also strongly on the chemical nature of the iron oxide. In this study, Au NPs supported on iron oxide nanorods with different surface properties through beta-FeOOH annealing, at varying temperatures, were synthesized, and applied in the CO oxidation. Detailed characterizations of the interactions between Au NPs and iron oxides were obtained by X-ray diffraction, transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy. The results indicate that the surface hydroxyl group on the Au/FeOOH catalyst, before calcination (Au/FeOOH-fresh), could facilitate the oxygen adsorption and dissociation on positively charged Au, thereby contributing to the low-temperature CO oxidation reactivity. After calcination at 200 degrees C under air exposure, the chemical state of the supported Au NP on varied iron oxides partly changed from metal cation to Au-0, along with the disappearance of the surface OH species. Au/FeOOH with the highest Au-0 content exhibits the highest activity in CO oxidation, among the as-synthesized catalysts. Furthermore, good durability in CO oxidation was achieved over the Au/FeOOH catalyst for 12 h without observable deactivation. In addition, the advanced identical-location TEM method was applied to the gas phase reaction to probe the structure evolution of the Au/iron oxide series of the catalysts and support structure. A Au NP size-dependent Ostwald ripening process mediated by the transport of Au(CO)(x) mobile species under certain reaction conditions is proposed, which offers a new insight into the validity of the structure-performance relationship. (C) 2019, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[21773269] ; National Natural Science Foundation of China[21761132025] ; National Natural Science Foundation of China[91545119] ; National Natural Science Foundation of China[21703262] ; Youth Innovation Promotion Association CAS[2015152] ; Joint Foundation of Liaoning Province Natural Science Foundation[20180510047] ; Shenyang National Laboratory for Materials Science[20180510047]
WOS研究方向	Chemistry ; Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000492801200009
资助机构	National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Joint Foundation of Liaoning Province Natural Science Foundation ; Shenyang National Laboratory for Materials Science
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/136807]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liu, Zhongwen; Zhang, Bingsen
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 2.Shaanxi Normal Univ, Sch Chem & Chem Engn, Minist Educ, Key Lab Appl Surface & Colloid Chem, Xian 710119, Shaanxi, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Shi, Wen,Gao, Tongtong,Zhang, Liyun,et al. Tailoring the surface structures of iron oxide nanorods to support Au nanoparticles for CO oxidation[J]. CHINESE JOURNAL OF CATALYSIS,2019,40(12):1884-1894.
APA	Shi, Wen,Gao, Tongtong,Zhang, Liyun,Ma, Yanshuang,Liu, Zhongwen,&Zhang, Bingsen.(2019).Tailoring the surface structures of iron oxide nanorods to support Au nanoparticles for CO oxidation.CHINESE JOURNAL OF CATALYSIS,40(12),1884-1894.
MLA	Shi, Wen,et al."Tailoring the surface structures of iron oxide nanorods to support Au nanoparticles for CO oxidation".CHINESE JOURNAL OF CATALYSIS 40.12(2019):1884-1894.