Characterisation of porous carbon electrode materials used in proton exchange membrane fuel cells via gas adsorption

M J Watt-Smith, Sean Rigby, T R Ralph, F C Walsh

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Porous carbon materials are typically used in both the substrate (typically carbon paper) and the electrocatalyst supports (often platinised carbon) within proton exchange membrane fuel cells. Gravimetric nitrogen adsorption has been studied at a carbon paper substrate, two different Pt-loaded carbon paper electrodes and three particulate carbon blacks. N2 BET surface areas and surface fractal dimensions were determined using the fractal BET and Frenkel-Halsey-Hill models for all but one of the materials studied. The fractal dimensions of the carbon blacks obtained from gas adsorption were compared with those obtained independently by small angle X-ray scattering and showed good agreement. Density functional theory was used to characterise one of the carbon blacks, as the standard BET model was not applicable.
Original languageEnglish
Pages (from-to)29-37
Number of pages9
JournalJournal of Power Sources
Volume184
Issue number1
DOIs
Publication statusPublished - 2008

Keywords

  • Paper
  • Carbon black
  • Protons
  • Fuel cells
  • Ion exchange membranes
  • Gas fuel purification
  • Proton exchange membrane fuel cells (PEMFC)
  • Solid oxide fuel cells (SOFC)
  • Gas adsorption
  • Carbon
  • Electric batteries
  • Electrodes
  • Metallizing
  • Platinum
  • Adsorption
  • Electrocatalysts
  • Electrochemistry
  • Nitrogen
  • Direct energy conversion

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