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Journal of Nanomaterials
Volume 2012 (2012), Article ID 418737, 6 pages
http://dx.doi.org/10.1155/2012/418737
Research Article

Polyol-Free Synthesis of Uniformly Dispersed Pt/Graphene Oxide Electrocatalyst by Sulfuric Acid Treatment

School of Chemical Engineering, University of Ulsan, Daehak-ro 102, Nam-gu, Ulsan 680-749, Republic of Korea

Received 25 September 2012; Revised 26 November 2012; Accepted 10 December 2012

Academic Editor: Yongsheng Li

Copyright © 2012 Tae Kyu Lee 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

Polyol-free synthesis of highly loaded Pt catalysts on sulfuric-acid-treated graphene oxide (SGO) was reported. Sulfuric acid treatment increased the surface hydroxyl groups on graphene oxide (GO), which contributed to the reduction of Pt precursors in the absence of external reducing agent. By adjusting pH during the Pt reduction, we can get uniformly dispersed 2.5 nm size Pt nanoparticles on GO surface even at 50 wt% Pt loading amount. Cyclic voltammetry showed that increased pH resulted in increased electrochemical surface area.