Probing the spontaneous reduction mechanism of platinum ions confined in the nanospace by X-ray absorption fine structure spectroscopy

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	Probing the spontaneous reduction mechanism of platinum ions confined in the nanospace by X-ray absorption fine structure spectroscopy
	Jiang, FL; Li, C; Fu, HY; Guo, XJ; Wu, GZ; Chen, SM
刊名	PHYSICAL CHEMISTRY CHEMICAL PHYSICS
	2016
卷号	18 期号:28 页码:19259-19266
ISSN号	1463-9076
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.
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
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/26607]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	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,2016,18(28):19259-19266.
APA	Jiang, FL,Li, C,Fu, HY,Guo, XJ,Wu, GZ,&Chen, SM.(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, FL,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.