Issue 15, 2013
From the journal:

Nanoscale

Atomistic nucleation sites of Pt nanoparticles on N-doped carbon nanotubes†

Chia-Liang Sun,*a   Chih-Wen Pao,b   Huang-Ming Tsai,b   Jau-Wern Chiou,c   Sekhar C. Ray,*d   Houng-Wei Wang,e   Michitoshi Hayashi,e   Li-Chyong Chen,e   Hong-Ji Lin,b   Jyh-Fu Lee,b   Li Chang,f   Min-Hsiung Tsai,g   Kuei-Hsien Chenh  and  Way-Faung Pong*i  

* Corresponding authors

a Department of Chemical and Materials Engineering, Chang Gung University, Kwei-Shan, Tao-Yuan 333, Taiwan
E-mail: sunchialiang@gmail.com

b National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan

c Department of Applied Physics, National University of Kaohsiung, Kaohsiung 811, Taiwan

d School of Physics, DST/NRF Centre of Excellence in Strong Materials and Materials Physics Research Institute (MPRI), University of the Witwatersrand, P/Bag 3, WITS 2050, Johannesburg, South Africa
E-mail: Sekhar.Ray@wits.ac.za

e Center for Condensed Matter Sciences, National Taiwan University, Taipei 106, Taiwan

f Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 300, Taiwan

g Department of Physics, National Sun Yat-Sen University, Kaohsiung 811, Taiwan

h Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan

i Department of Physics, Tamkang University, Tamsui 251, Taiwan
E-mail: wfpong@mail.tku.edu.tw

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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Article information

DOI
https://doi.org/10.1039/C3NR01234D
Article type
Paper
Submitted
11 Mar 2013
Accepted
16 May 2013
First published
20 May 2013

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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