Increased Stability of Palladium-Iridium-Gold Electrocatalyst for the Hydrogen Oxidation Reaction in Polymer Electrolyte Membrane Fuel Cells

Laura K. Allerston, David Hodgson, Christopher Gibbs, Dan J.L. Brett, Neil V. Rees*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The development of non-Pt hydrogen oxidation reaction catalysts for hydrogen-fuelled polymer electrolyte fuel cells allows for an overall reduction in electrode Pt content and therefore helps reduce the cost of devices, one of the biggest commercial challenges. Herein, a novel ternary alloy catalyst supported on carbon, PdIrAu/C, has been synthesised, characterised and compared to the binary PdIr/C to show how the addition of Au improves the stability of the catalyst. Transmission electron microscopy was utilised to analyse electrode structure as a function of the synthesis method, showing the optimum annealing temperature, of those tested, to be 400 °C, while inductively-coupled plasma mass spectrometry provided analysis of the degradation of the two catalysts, confirming the PdIrAu/C catalyst is more stable at potentials similar to those at a fuel cell anode than PdIr/C.

Original languageEnglish
JournalElectroanalysis
DOIs
Publication statusAccepted/In press - 2020

Keywords

  • alloy
  • durability
  • electrocatalysts
  • fuel cells
  • gold
  • iridium
  • palladium

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry

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