Pt nanoclusters prepared by magnetron sputtering and cluster beam deposition for proton exchange membrane fuel cell - INSTITUT DE CHIMIE DES MILIEUX ET MATERIAUX DE POITIERS Accéder directement au contenu
Communication Dans Un Congrès Année : 2013

Pt nanoclusters prepared by magnetron sputtering and cluster beam deposition for proton exchange membrane fuel cell

Résumé

Metallic nanoclusters have found numerous applications in heterogeneous catalysis (effluent treatments, sensors, energy storage and conversion, etc.). Costly and strategic metals from the platinum group are required. There is thus a real interest to obtain the highest catalytic surface area from a low metal weight, in particular for fuel cell electrodes for achieving highest performance. Here, different techniques of physical vapor deposition have been developed for the synthesis of Pt catalytic nanoclusters. We can distinguish sputtering techniques where the nucleation and the growth clusters occur on the substrate (conventional DC magnetron sputtering - DCMS) from those where the nucleation and the growth happen in the gas phase (low energy cluster beam deposition, LECBD). In this work, well defined platinum nanoclusters are produced by DCMS/LECBD on perfluoropolymer membranes (Nafion® used as ion conductive electrolyte in fuel cell) and on microporous carbon substrates (Sigracet® carbon used as cathode in fuel cell). Platinum acts as catalyst for oxygen reduction at the cathode-membrane interface. The physical and the electrochemical properties of the Pt nanoclusters have been investigated as a function of the deposition technique and of the deposition parameters. The catalyst coated membrane (CCM) and the catalyst coated backing (CCB) are tested in a proton exchange membrane fuel cell station. The maximum power densities reach 0.7 and 0.50 W cm-2, respectively. The performance is compared to those obtained with commercial fuel cell where the Pt nanoclusters are grown by chemical routes.

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Dates et versions

hal-00905798 , version 1 (18-11-2013)

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  • HAL Id : hal-00905798 , version 1

Citer

Amaël Caillard, Stéphane Cuynet, Pascal Brault, Thomas Lecas, Steve Baranton, et al.. Pt nanoclusters prepared by magnetron sputtering and cluster beam deposition for proton exchange membrane fuel cell. IVC-19 / ICN+T 2013 and partner conferences, Sep 2013, Paris, France. pp.2160. ⟨hal-00905798⟩
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