Title: Atomistic nucleation sites of Pt nanoparticles on N-doped carbon nanotubes
Authors: Sun, Chia-Liang
Pao, Chih-Wen
Tsai, Huang-Ming
Chiou, Jau-Wern
Ray, Sekhar C.
Wang, Houng-Wei
Hayashi, Michitoshi
Chen, Li-Chyong
Lin, Hong-Ji
Lee, Jyh-Fu
Chang, Li
Tsai, Min-Hsiung
Chen, Kuei-Hsien
Pong, Way-Faung
Department of Materials Science and Engineering
Issue Date: 2013
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 L-3-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.
URI: http://hdl.handle.net/11536/22438
ISSN: 2040-3364
DOI: 10.1039/c3nr01234d
Volume: 5
Issue: 15
Begin Page: 6812
End Page: 6818
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