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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
ISSN1463-9076
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
DOI10.1039/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
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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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