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Influence of the carbon texture of platinum/carbon aerogel electrocatalysts on their behavior in a proton exchange membrane fuel cell cathode

Abstract : Seven carbon aerogels (CAs) with different pore size distributions were synthesized and used as a catalyst support in proton exchange membrane fuel cell (PEMFC) cathodes. The cathodes were tested in 50 cm 2 membrane electrode assemblies. The results demonstrate that the CA texture significantly influences performance by impacting gas diffusion and proton transport. Also, the Nafion ® loading must be adapted to the CA texture, since its easier penetration into large pores favors their obstruction and results in higher proton resistance and mass-transport voltage losses. Under fixed experimental conditions (notably Nafion ®/carbon ratio = 1), the best CA support displays high specific surface area and pore volume, a majority of mesopores with a pore size distribution peak around 25-30 nm and with some macropores. The work confirms that the carbon support structure must be controlled to reduce mass-transport voltage losses. Doing so would lead to reduce PEMFC overall cost per kW.
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https://hal-mines-paristech.archives-ouvertes.fr/hal-00699512
Contributeur : Magalie Prudon <>
Soumis le : lundi 21 mai 2012 - 10:09:18
Dernière modification le : jeudi 19 novembre 2020 - 13:50:08

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Mathilde Ouattara-Brigaudet, Sandrine Berthon-Fabry, Christian Beauger, Marian Chatenet, Nathalie Job, et al.. Influence of the carbon texture of platinum/carbon aerogel electrocatalysts on their behavior in a proton exchange membrane fuel cell cathode. International Journal of Hydrogen Energy, Elsevier, 2012, 37 (12), pp.9742-9757. ⟨10.1016/j.ijhydene.2012.03.085⟩. ⟨hal-00699512⟩

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