Chiang Mai Journal of Science

Print ISSN: 0125-2526 | eISSN : 2465-3845

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Morphology and Catalytic Activity of Gold Core-Platinum Shell Nanoparticles

Kontee Thongthai, Laongnuan Srisombat, Surin Saipanya and Supon Ananta
* Author for corresponding; e-mail address: slaongnuan@yahoo.com
Volume: Vol.42 No.2 (APRIL 2015)
Research Article
DOI:
Received: 3 July 2014, Revised: -, Accepted: 24 September 2014, Published: -

Citation: Thongthai K., Srisombat L., Saipanya S. and Ananta S., Morphology and Catalytic Activity of Gold Core-Platinum Shell Nanoparticles, Chiang Mai Journal of Science, 2015; 42(2): 481-489.

Abstract

 Morphologies, chemical compositions and optical properties of the hybrid gold core-platinum shell, Au@Pt, nanoparticles prepared by a simple reduction method were explored via a combination of transmission electron microscopy, energy dispersive X-ray spectroscopy and UV-visible spectrophotometry techniques. Various sizes of almost spherical and monodispersed Au@Pt core-shell nanoparticles were successfully achieved by changing of Au/Pt atomic ratios. The effect of Au/Pt atomic ratio on the electrocatalytic activities for these Au@Pt nanoparticles supported on multi-walled carbon nanotubes (MWCNTs) is revealed by cyclic voltammetry in 1.0 M H2SO4 + 2.0 M methanol aqueous solution. The maximum activity is obtained by using atomic ratio of Au/Pt at ~1. Moreover, all Au@Pt/MWCNTs catalysts exhibited higher activities than that of Pt/MWCNTs catalysts.

Keywords: Bimetallic nanoparticles, Core-shell structure, Morphology, Catalyst, Methanol oxidation

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