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Influence of Modifications to the Pechini Method on the Electroactivity and Stability of Pt-RuOx/C Catalysts

Since electrode electroactivity and stability depend directly on the nature, morphology, and structure of the material, we have investigated how modifications to the Pechini method during the synthesis of Pt-RuOx/C electrocatalysts affected catalyst activity. The structure and stability of the resul...

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Published in:Journal of the Electrochemical Society 2012-01, Vol.159 (8), p.F393-F397
Main Authors: Rufino, É. C. G., Purgato, F. L. S., Olivi, P.
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Language:English
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container_end_page F397
container_issue 8
container_start_page F393
container_title Journal of the Electrochemical Society
container_volume 159
creator Rufino, É. C. G.
Purgato, F. L. S.
Olivi, P.
description Since electrode electroactivity and stability depend directly on the nature, morphology, and structure of the material, we have investigated how modifications to the Pechini method during the synthesis of Pt-RuOx/C electrocatalysts affected catalyst activity. The structure and stability of the resulting materials were investigated after their submission to a large number of potential scans and to constant potential for a prolonged time period in sulfuric acid 0.5 mol L−1 and methanol 0.1 mol L−1 solution. DMFC tests were accomplished using membrane electrode assemblies (MEAs) prepared by hot-pressing a pretreated Nafion 117 membrane together with the prepared Pt-RuOx anodes and a Pt cathode (from E-TEK), in order to compare the catalytic activity of the materials prepared by different methods. The stability studies demonstrated that the catalyst whose resin/carbon support mixture was agitated in a balls mill before undergoing heat-treatment was more stable than the other prepared catalysts. The catalysts synthesized with the single resin consisting of Pt and Ru and subjected to ultrasound before heat-treatment furnished the highest power density in the single fuel cell.
doi_str_mv 10.1149/2.011208jes
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The stability studies demonstrated that the catalyst whose resin/carbon support mixture was agitated in a balls mill before undergoing heat-treatment was more stable than the other prepared catalysts. 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title Influence of Modifications to the Pechini Method on the Electroactivity and Stability of Pt-RuOx/C Catalysts
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