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| Structural changes of Rh-Mn nanoparticles inside carbon nanotubes studied by X-ray absorption spectroscopy | |
| Bao, HL; Sun, XP; Jiang, Z; Huang, YY; Wang, JQ; huangyuying@sinap.ac.cn; wangjianqiang@sinap.ac.cn | |
| 2014 | |
| Source Publication | CHINESE JOURNAL OF CATALYSIS
 |
| ISSN | 0253-9837 |
| Volume | 35Issue:8Pages:1418—1427 |
| Abstract | Supported Rh-based catalysts such as Rh-Mn nanoparticles (NPs) have potential use in the synthesis of ethanol from syngas. The structure of Rh-Mn NPs in multi-walled carbon nanotubes under different atmospheres and temperatures was studied by X-ray absorption spectroscopy (XAS). TEM images showed that the NPs dispersed in the carbon nanotubes had a uniform size of 2 nm. XAS data revealed that the Rh-Mn NPs before reduction were composed of Rh2O3 clusters and mixed Mn oxide species. After reduction in a 10% H-2-90% He atmosphere, the mixed Mn oxides were converted into nearly pure MnO. In contrast, the Rh2O3 clusters were easily decomposed to metallic Rh clusters even under a He atmosphere at 250 degrees C. The Rh clusters remained in the metal state under the next reduction atmosphere, but their dispersion in the Rh-Mn NPs increased with increasing temperature. No significant Mn-Rh or Mn-O-Rh interaction in the reduced NPs was observed in the extended X-ray absorption fine structure analysis. The results showed that there was no interaction between the MnO particles and Rh clusters and the role of the Mn promoter was mainly to improve Rh dispersion. (C) 2014, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved. |
| Keyword | Supported Rhodium Catalysts Monoxide Hydrogen Mixtures Co Hydrogenation C-2-oxygenates Synthesis Rh-mn-li/sio2 Catalyst Ethanol-production Manganese Oxides Syngas Promoter Conversion |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000340347100021 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.sinap.ac.cn/handle/331007/14415 |
| Collection | 中科院上海应用物理研究所2011-2020年 |
| Corresponding Author | huangyuying@sinap.ac.cn; wangjianqiang@sinap.ac.cn |
| Recommended Citation GB/T 7714 | Bao, HL,Sun, XP,Jiang, Z,et al. Structural changes of Rh-Mn nanoparticles inside carbon nanotubes studied by X-ray absorption spectroscopy[J]. CHINESE JOURNAL OF CATALYSIS,2014,35(8):1418—1427. |
| APA | Bao, HL.,Sun, XP.,Jiang, Z.,Huang, YY.,Wang, JQ.,...&wangjianqiang@sinap.ac.cn.(2014).Structural changes of Rh-Mn nanoparticles inside carbon nanotubes studied by X-ray absorption spectroscopy.CHINESE JOURNAL OF CATALYSIS,35(8),1418—1427. |
| MLA | Bao, HL,et al."Structural changes of Rh-Mn nanoparticles inside carbon nanotubes studied by X-ray absorption spectroscopy".CHINESE JOURNAL OF CATALYSIS 35.8(2014):1418—1427. |
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