| Tailoring the surface structures of iron oxide nanorods to support Au nanoparticles for CO oxidation | |
| Shi, Wen1,3; Gao, Tongtong1,2; Zhang, Liyun1; Ma, Yanshuang1; Liu, Zhongwen2; Zhang, Bingsen1 | |
| Corresponding Author | Liu, Zhongwen(zwliu@snnu.edu.cn) ; Zhang, Bingsen(bszhang@imr.ac.cn) |
| 2019-12-01 | |
| Source Publication | CHINESE JOURNAL OF CATALYSIS
 |
| ISSN | 0253-9837 |
| Volume | 40Issue:12Pages:1884-1894 |
| Abstract | 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. |
| Keyword | Iron oxide nanorods Surface property Au nanoparticle CO oxidation Structure evolution |
| Funding Organization | 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 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Chemistry ; Engineering |
| WOS Subject | Chemistry, Applied ; Chemistry, Physical ; Engineering, Chemical |
| WOS ID | WOS:000492801200009 |
| Publisher | SCIENCE PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/136808 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Liu, Zhongwen; Zhang, Bingsen |
| Affiliation | 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 |
| Recommended Citation 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. |
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