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Journal of Nanomaterials
Volume 2012 (2012), Article ID 928230, 6 pages
http://dx.doi.org/10.1155/2012/928230
Research Article

PtRu/C Electrocatalysts Prepared Using Gamma and Electron Beam Irradiation for Methanol Electrooxidation

Instituto de Pesquisas Energéticas e Nucleares, IPEN/CNEN, Cidade Universitária, Avenue Professor Lineu Prestes, 2242, 05508-000 São Paulo, SP, Brazil

Received 18 October 2011; Revised 1 February 2012; Accepted 7 February 2012

Academic Editor: Mauro Coelho dos Santos

Copyright © 2012 Dionisio F. Silva et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

PtRu/C electrocatalysts (carbon-supported PtRu nanoparticles) were prepared in a single step submitting water/2-propanol mixtures containing Pt(IV) and Ru(III) ions and the carbon support to gamma and electron beam irradiation. The electrocatalysts were characterized by energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD), transmission electron microscopy (TEM), and cyclic voltammetry and tested for methanol electrooxidation. PtRu/C electrocatalyst can be prepared in few minutes using high dose rate electron beam irradiation while using low dose rate gamma irradiation some hours were necessary to prepare it. The obtained materials showed the face-centered cubic (fcc) structure of Pt and Pt alloys with average nanoparticle sizes of around 3 nm. The material prepared using electron beam irradiation was more active for methanol electrooxidation than the material prepared using gamma irradiation.