Functionalized 2D Graphene Sheets as Catalyst Support for Proton Exchange Membrane Fuel Cell Electrodes
Authors: Karthika, P.; Rajalakshmi, N.; Jaffri, R. Imran; Ramaprabhu, S.; Dhathathreyan, K. S.
Source: Advanced Science Letters, Volume 6, Number 1, March 2012 , pp. 141-146(6)
Publisher: American Scientific Publishers
Abstract:Functionalized graphene sheets have been investigated as catalyst supports for platinum electrocatalysts for use in PEMFC electrodes. Well-dispersed Pt nanoparticles with small particle size were impregnated on graphene sheets. The electrochemical tests showed that the Pt nanoparticles supported on graphene shows good electrochemical activity and much higher Electrochemical Surface Area (ECSA) of 24 m2/g. The maximum current density was found to be 700 mA/cm2 for electrodes having Pt/G catalysts on both electrodes, compared to electrodes where Pt/C is being used at the anode. This study reveals that Pt/G can be a good electro catalyst not only for oxygen reduction but also for hydrogen oxidation. The dispersion of the electrocatalyst on graphene has been found to be useful for achieving relatively better performance in fuel cells. Electrochemical experiments show that the Pt supported on graphene oxide have superior catalytic performance indicating that the graphene may have a splendid future as catalyst carrier in electrocatalyst and fuel cell.
Document Type: Research Article
Publication date: March 1, 2012
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