| Probing the spontaneous reduction mechanism of platinum ions confined in the nanospace by X-ray absorption fine structure spectroscopy | |
| Jiang, Fangling1,2; Li, Cheng1; Fu, Haiying1; Guo, Xiaojing1; Wu, Guozhong1; Chen, Shimou3 | |
| 2016-07-28 | |
| 发表期刊 | PHYSICAL CHEMISTRY CHEMICAL PHYSICS
 |
| ISSN | 1463-9076 |
| 卷号 | 18期号:28页码:19259-19266 |
| 摘要 | The reduction mechanism of Pt4+ ions confined in the channel of multi-walled carbon nanotubes was mainly investigated using X-ray absorption fine structure (XAFS) spectroscopy, with the aid of TEM, Raman, XRD and ICP-AES studies. The XAFS spectra revealed the spontaneous formation of Pt nanoparticles when H2PtCl6 was confined in multi-walled carbon nanotubes (MWCNTs). The Pt L-3-edge X-ray absorption near edge structure (XANES) coupled with the C K-edge NEXAFS results indicated that the reduction of Pt4+ from tetravalent to zerovalent was attributed to the electron transfer from MWCNTs. The Fourier transform R-space of the Pt L-3-edge XAFS data displayed that the nanoconfinement effect of MWCNTs promoted the formation of Pt nanoparticles. Moreover, the Pt-Pt bond length in confined Pt nanoparticles became shorter than that of Pt in the bulk state. Furthermore, by varying the inner diameter of MWCNTs from 15 nm to 10 nm and 5 nm, the Pt-Pt bond length of nanoconfined Pt nanoparticles decreased gradually. The results clearly revealed that MWCNTs acting as enriched electron donors can continuously reduce the confined Pt ions to Pt nanoparticles, thereby showing a great potential for the design of a new type of confined nanocatalysts. |
| 文章类型 | Article |
| WOS标题词 | Science & Technology ; Physical Sciences |
| DOI | 10.1039/c6cp02565j |
| 收录类别 | SCI |
| 语种 | 英语 |
| 关键词[WOS] | WALLED CARBON NANOTUBES ; GOLD NANOPARTICLES ; OXYGEN REDUCTION ; CHARGE-TRANSFER ; OXIDATION ; HYDROGENATION ; CATALYSTS ; LIQUID ; GROWTH ; IRON |
| WOS研究方向 | Chemistry ; Physics |
| WOS类目 | Chemistry, Physical ; Physics, Atomic, Molecular & Chemical |
| 项目资助者 | National Natural Science Foundation of China(11079007 ; 21306220 ; 21276257 ; 91534109) |
| WOS记录号 | WOS:000379939100064 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ipe.ac.cn/handle/122111/21258 |
| 专题 | 生化工程国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Fangling,Li, Cheng,Fu, Haiying,et al. Probing the spontaneous reduction mechanism of platinum ions confined in the nanospace by X-ray absorption fine structure spectroscopy[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2016,18(28):19259-19266. |
| APA | Jiang, Fangling,Li, Cheng,Fu, Haiying,Guo, Xiaojing,Wu, Guozhong,&Chen, Shimou.(2016).Probing the spontaneous reduction mechanism of platinum ions confined in the nanospace by X-ray absorption fine structure spectroscopy.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,18(28),19259-19266. |
| MLA | Jiang, Fangling,et al."Probing the spontaneous reduction mechanism of platinum ions confined in the nanospace by X-ray absorption fine structure spectroscopy".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 18.28(2016):19259-19266. |
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