, Volume 7, Issue 3, pp 226–234 | Cite as

Spontaneous Deposition of Iridium onto Nickel Substrates for the Oxygen Evolution Reaction

  • Sophia R. Mellsop
  • Alister Gardiner
  • Aaron T. MarshallEmail author
Original Research


Spontaneous deposition of Ir onto Ni substrates was investigated as a method to produce electrocatalytic layers for the oxygen evolution reaction in 30 % KOH solution. UV/Vis spectroscopy, cyclic voltammetry and other electrochemical methods are used to investigate the deposition process and the activity of the electrocatalytic coating towards the oxygen evolution reaction. From three solutions (IrCl3+HCl, H2IrCl6+HCl and H2IrCl6), H2IrCl6 is shown to give the most active and stable coating, with deposition times of 45 min at 60C enough to increase the activity of the Ni substrate for the oxygen evolution reaction. It is proposed that Ir deposition can occur via the reduction of the Ir precursor coupled to Ni oxidation, as well as the hydrolysis and localised precipitation of the Ir precursor due to the increase in surface pH during Ni dissolution.


Iridium oxide Nickel oxide Oxygen evolution reaction Alkaline water electrolysis Electrocatalysis 



Funding for this work has been provided under MSI Contract C08X1002. We thank Mike Flaws and Tobias Baldhoff for assistance with the SEM and EDS analysis.


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Sophia R. Mellsop
    • 1
  • Alister Gardiner
    • 2
  • Aaron T. Marshall
    • 1
    Email author
  1. 1.Department of Chemical and Process Engineering, MacDiarmid Institute for Advanced Materials and NanotechnologyUniversity of CanterburyChristchurchNew Zealand
  2. 2.Callaghan Innovation (Research) LimitedChristchurchNew Zealand

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