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Increased Stability of Palladium‐Iridium‐Gold Electrocatalyst for the Hydrogen Oxidation Reaction in Polymer Electrolyte Membrane Fuel Cells
Author(s) -
Allerston Laura K.,
Hodgson David,
Gibbs Christopher,
Brett Dan J. L.,
Rees Neil V.
Publication year - 2020
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.202060291
Subject(s) - electrocatalyst , catalysis , electrolyte , chemical engineering , anode , materials science , palladium , membrane electrode assembly , hydrogen , inorganic chemistry , proton exchange membrane fuel cell , ternary operation , electrochemistry , chemistry , electrode , organic chemistry , engineering , computer science , programming language
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.