Morphology and catalytic activity of gold core-platinum shell nanoparticles

• Main Authors: Thongthai,K., Srisombat,L.O., Saipanya,S., Ananta,S.S.
• Format: Article
• Published: Chiang Mai University 2015
• Subjects: Physics and Astronomy (all); Chemistry (all); Materials Science (all); Mathematics (all); Biochemistry, Genetics and Molecular Biology (all)
• Online Access: http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84928688253&origin=inward; http://cmuir.cmu.ac.th/handle/6653943832/38944
• Institution: Chiang Mai University

© 2015 Chiang Mai University. All rights reserved. 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 H<inf>2</inf>SO<inf>4</inf> + 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.