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Morphology and Catalytic Activity of Gold Core-Platinum Shell Nanoparticles


Paper Type 
 Contributed Paper
Title 
 Morphology and Catalytic Activity of Gold Core-Platinum Shell Nanoparticles
Author 
 Kontee Thongthai, Laongnuan Srisombat, Surin Saipanya and Supon Ananta
Email 
 slaongnuan@yahoo.com
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.
Start & End Page 
 481 - 489
Received Date 
 2014-07-03
Revised Date 
Accepted Date 
 2014-09-24
Full Text 
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Keyword 
 Bimetallic nanoparticles, Core-shell structure, Morphology, Catalyst, Methanol oxidation
Volume 
 Vol.42 No.2 (APRIL 2015)
DOI 
Citation 
 Thongthai K., Srisombat L., Saipanya S. and Ananta S., Morphology and Catalytic Activity of Gold Core-Platinum Shell Nanoparticles, Chiang Mai J. Sci., 2015; 42(2): 481-489.
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