Journal
ELECTROANALYSIS
Volume 32, Issue 12, Pages 2893-2901Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.202060291
Keywords
electrocatalysts; fuel cells; palladium; iridium; gold; alloy; durability
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Funding
- EPSRC [EP/L015749/1]
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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 degrees 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.
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