Elaboration and characterizations of platinum nanoparticles supported on cellulose-based carbon aerogel

Abstract : This work investigates the deposition of Pt nanoparticles onto carbonized aerocellulose (CAC), via impregnation of the CAC with H2PtCl 6 followed by reduction either under H2 at 300-400°C or in a basic NaBH4 solution. H2 reduction yields uniform Pt nanoparticles (average diameter < 2 nm) dispersed over the CAC surface, as revealed by transmission electron microscopy (TEM). Larger agglomerates can be seen in TEM images for NaBH4 reduced samples, which is confirmed by powder X-ray diffraction (XRD). A rotating disk electrode was employed to analyze the electrochemical properties of the Pt/CAC materials. The active area of the platinum nanoparticles was evaluated using hydrogen adsorption/desorption cyclic voltammetry and CO-stripping measurements. The oxygen reduction reaction kinetic parameters of the Pt/CAC materials compare well with those of commercial Pt/Carbon Black (CB). Finally, PEMFC unit cell testing demonstrates that a Pt/CAC electrocatalyst synthesized using 3 successive impregnation/reduction steps can compete with state-of-the-art Pt/CB electrocatalysts
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Soumis le : vendredi 1 avril 2011 - 15:45:50
Dernière modification le : jeudi 7 février 2019 - 17:06:44

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Joanna Rooke, Camila Matos, Marian Chatenet, Romain Sescousse, Tatiana Budtova, et al.. Elaboration and characterizations of platinum nanoparticles supported on cellulose-based carbon aerogel. ECS Transactions, Electrochemical Society, Inc., 2010, 33 (1), pp.Pages 447-459. ⟨10.1149/1.3484543⟩. ⟨hal-00582483⟩

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