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Optimisation of the Electrodeposition Parameters for Platinum Nanoparticles on Carbon Nanofibers Support

  • Platinum nanoparticles electrodeposition on carbon nanofibers (CNF) support has been performed with the purpose to obtain electrodes that can be further used especially in a polymer electrolyte membrane fuel cell (PEMFC). A pretreatment of CNF is required in order to enhance the surface energy, which simultaneously improves handling and wettability as well as interaction with the platinum cations. This step was performed using oxygen plasma functionalization. To produce CNF supported Pt catalysts, an electrochemical method was applied and the deposition parameters were adjusted to obtain nanosized platinum particles with a good distribution onto the graphitic surface. The morphology and structure of the obtained particles were investigated by scanning electron microscopy combined with energy dispersive X-Ray spectroscopy. The amount of deposited platinum was established using thermogravimetrical measurements. Cyclic voltammetry performed in 0.5 M H2SO4 solution was applied for determining the electrochemical surface area (ECSA) of the obtained electrodes.The functionalization degree of the CNF outer surface has a strong influence on the structure, distribution and amount of platinum particles. Moreover, the current densities, which were set for the deposition process influenced not only the particles size but also the platinum amount. Applying an oxygen plasma treatment of 80 W for 1800 s, the necessary degree of surface functionalization is achieved in order to deposit the catalyst particles. The best electrodes were prepared using a current density of 50 mA cm-2 during the deposition process that leads to a homogenous platinum distribution with particles size under 80 nm and ECSA over 6 cm2

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Metadaten
Verfasserangaben:Roxana Muntean, Ulrich Rost, Gabriela Marginean, Nicolae Vaszilcsin
DOI:https://doi.org/10.4028/www.scientific.net/SSP.254.153
Titel des übergeordneten Werkes (Englisch):Solid state phenomena
Dokumentart:Wissenschaftlicher Artikel
Sprache:Englisch
Datum der Veröffentlichung (online):02.02.2017
Jahr der Erstveröffentlichung:2016
Veröffentlichende Institution:Westfälische Hochschule Gelsenkirchen Bocholt Recklinghausen
Datum der Freischaltung:15.02.2017
Freies Schlagwort / Tag:carbon nanofibers, platinum electrodeposition, electrocatalysts
Ausgabe / Heft:254
Erste Seite:153
Letzte Seite:158
Fachbereiche / Institute:Institute / Westfälisches Energieinstitut
Lizenz (Deutsch):License LogoEs gilt das Urheberrechtsgesetz

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