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题名:
Probing the spontaneous reduction mechanism of platinum ions confined in the nanospace by X-ray absorption fine structure spectroscopy
作者: Jiang, FL; Li, C; Fu, HY; Guo, XJ; Wu, GZ; Chen, SM
刊名: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
出版日期: 2016
卷号: 18, 期号:28, 页码:19259-19266
DOI: 10.1039/c6cp02565j
通讯作者: Wu, GZ (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China. ; Chen, SM (reprint author), Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China.
文章类型: 期刊论文
英文摘要: 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.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000379939100064
ISSN号: 1463-9076
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/26607
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Jiang, FL,Li, C,Fu, HY,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,2016-01-01,18(28):19259-19266.
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