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    题名: Atomistic nucleation sites of Pt nanoparticles on N-doped carbon nanotubes
    作者: Sun, Chia-Liang;Pao, Chih-Wen;Tsai, Huang-Ming;Chiou, Jau-Wern;Ray, Sekhar C.;Wang, Houng-Wei;Michitoshi Hayashi;Chen, Li-Chyong;Lin, Hong-Ji;Lee, Jyh-Fu;Chang, Li;Tsai, Min-Hsiung;Chenh, Kuei-Hsien;Pong, Way-Faung
    贡献者: 淡江大學物理學系
    日期: 2013-05
    上传时间: 2014-02-17 09:43:21 (UTC+8)
    出版者: Cambridge: R S C Publications
    摘要: The atomistic nucleation sites of Pt nanoparticles (Pt NPs) on N-doped carbon nanotubes (N-CNTs) were investigated using C and N K-edge and Pt L3-edge X-ray absorption near-edge structure (XANES)/extended X-ray absorption fine structure (EXAFS) spectroscopy. Transmission electron microscopy and XANES/EXAFS results revealed that the self-organized Pt NPs on N-CNTs are uniformly distributed because of the relatively high binding energies of the adsorbed Pt atoms at the imperfect sites. During the atomistic nucleation process of Pt NPs on N-CNTs, stable Pt–C and Pt–N bonds are presumably formed, and charge transfer occurs at the surface/interface of the N-CNTs. The findings in this study were consistent with density functional theory calculations performed using cluster models for the undoped, substitutional-N-doped and pyridine-like-N-doped CNTs.
    關聯: Nanoscale 5(15), pp.6812-6818
    DOI: 10.1039/c3nr01234d
    显示于类别:[物理學系暨研究所] 期刊論文

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