Electro-deposition on carbon black and carbon nanotubes of Pt nanostructured catalysts for methanol oxidation

Claudia Paoletti, Alessia Cemmi, Leonardo Giorgi, Rossella Giorgi, Luciano Pilloni, Emanuele Serra, Mauro Pasquali

Research output: Contribution to journalArticle

92 Citations (Scopus)

Abstract

An electrochemical method for the Pt nanoparticles deposition on porous and high surface carbon substrates (carbon black and carbon nanotubes), as an alternative way to prepare gas diffusion electrodes for polymer electrolyte fuel cells (PEFCs), is herein described. Pt nanoparticles well distributed and localized on the electrode surface were obtained by using an electric field. The electro-catalysts were prepared by single and multiple pulse galvanostatic polarizations in 1 M sulphuric acid + 5 mM exachloroplatinic acid solution. Chemical analysis, cyclic voltammetry and field emission gun scanning electron microscopy were used to determine the electrochemical features of Pt deposits and the influence of electro-deposition method on their nano-morphology. Electro-catalytic performances were studied by investigating the methanol oxidation reaction and the results are presented in form of surface specific activity and mass specific activity to take into account the electrochemical real surface and Pt loading. A comparison with commercial E-TEK Pt/C catalysts, prepared by traditional chemical reduction and heat treatment in hydrogen, shows that the electrodeposited catalyst presents higher activity at lower Pt loading. © 2008 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)84 - 91
Number of pages8
JournalJournal of Power Sources
Volume183
Issue number1
DOIs
Publication statusPublished - 15 Aug 2008

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Electrochemistry
  • Fuel Technology
  • Materials Chemistry
  • Energy (miscellaneous)

Cite this