Electrocatalytic activity of PtWOx and WOx catalysts on different carbon support

Anca Dumitru 1Adina Morozan 1Keith Scott 2Constantin Mirea 1ioan stamatin 1

1. 3Nano-SAE Res Center, University of Bucharest (3Nano-SAE), Atomistilor 405, Bucharest- Magurele MG-38, Romania
2. University of Newcastle, Newcastle NE17RU, United Kingdom

Abstract

The reduction of oxygen has always been a cause of significant power loss in fuel cells technology. Pt based catalysts still remain the optimum electrocatalysts for oxygen reduction. For the catalyst preparation, Vulcan XC72 is commonly used as carbon support. A main focus of this research is the synthesis of PtWOx and WOx on different carbon support as alternative catalyst for fuel cell technology.

PtWOx and WOx catalysts on Vulcan XC-72, carbon aerogel and MWNts are prepared by impregnation-reduction method. SEM and EDAX analysis give the information about catalysts morphology and composition. The electrocatalytic ORR activities were characterized using voltammetric technique. We have also attempted an initial comparison of the electrocatalytic activities of PtWOx and WOx with commercially-available Pt/C catalyst (E-tek) under same voltammetric measurement conditions. The results revealed important insight into the electroactivity of our catalyst and give the possibility of replacing precious metal anode catalysts with transition metal compounds for hydrogen oxidation.

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Presentation: Poster at E-MRS Fall Meeting 2007, Acta Materialia Gold Medal Workshop, by Anca Dumitru
See On-line Journal of E-MRS Fall Meeting 2007

Submitted: 2007-05-14 21:36
Revised:   2009-06-07 00:44
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