|Title||Study of different nanostructured carbon supports for fuel cell catalysts|
|Publication Type||Articolo su Rivista peer-reviewed|
|Year of Publication||2009|
|Authors||Mirabile Gattia, Daniele, Antisari M.V., Giorgi L., Marazzi R., Piscopiello E., Montone A., Bellitto S., Licoccia S., and Traversa E.|
|Journal||Journal of Power Sources|
|Keywords||AC arc discharge, Carbon black, Carbon clusters, Carbon Nanostructures, Carbon nanotubes, Carbon support, Catalysis, Catalyst activity, Cell membranes, Cyclic voltammetry, Differential yields, Direct methanol, Electric discharges, Electro-catalytic activity, Electrochemical characterizations, Electrochemical sensors, Fuel cell catalysts, Fuel cells, Graphite, Graphite electrodes, Methanol, Methanol oxidation reactions, Multi-wall carbon nanotubes, Multiwalled carbon nanotubes (MWCN), Nanohorns, Nanostructured carbons, Nanostructures, Platinum, Platinum compounds, Pt clusters, Pt deposition, Pt loading, Pt particle, Scanning and transmission electron microscopy, Single wall carbon nanohorn, Single-walled carbon nanotubes (SWCN), Surface area, Surface chemical activity, Transmission electron microscopy, UV-vis spectrophotometry, Vulcan XC72, X- Ray diffraction|
Pt clusters were deposited by an impregnation process on three carbon supports: multi-wall carbon nanotubes (MWNT), single-wall carbon nanohorns (SWNH), and Vulcan XC-72 carbon black to investigate the effect of the carbon support structure on the possibility of reducing Pt loading on electrodes for direct methanol (DMFC) fuel cells without impairing performance. MWNT and SWNH were in-house synthesised by a DC and an AC arc discharge process between pure graphite electrodes, respectively. UV-vis spectrophotometry, scanning and transmission electron microscopy, X-ray diffraction, and cyclic voltammetry measurements were used to characterize the Pt particles deposited on the three carbon supports. A differential yield for Pt deposition, not strictly related to the surface area of the carbon support, was observed. SWNH showed the highest surface chemical activity toward Pt deposition. Pt deposited in different forms depending on the carbon support. Electrochemical characterizations showed that the Pt nanostructures deposited on MWNT are particularly efficient in the methanol oxidation reaction. © 2009 Elsevier B.V. All rights reserved.
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