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Issue 15, 2013
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Atomistic nucleation sites of Pt nanoparticles on N-doped carbon nanotubes

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Abstract

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.

Graphical abstract: Atomistic nucleation sites of Pt nanoparticles on N-doped carbon nanotubes

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Publication details

The article was received on 11 Mar 2013, accepted on 16 May 2013 and first published on 20 May 2013


Article type: Paper
DOI: 10.1039/C3NR01234D
Citation: Nanoscale, 2013,5, 6812-6818
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    Atomistic nucleation sites of Pt nanoparticles on N-doped carbon nanotubes

    C. Sun, C. Pao, H. Tsai, J. Chiou, S. C. Ray, H. Wang, M. Hayashi, L. Chen, H. Lin, J. Lee, L. Chang, M. Tsai, K. Chen and W. Pong, Nanoscale, 2013, 5, 6812
    DOI: 10.1039/C3NR01234D

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