Easily prepared, high activity Ir–Ni oxide catalysts for water oxidation

• Author(s) / Creator(s)

  • Moghaddam, Reza B.
  • Wang, Chao
  • Sorge, Jason B.
  • Brett, Michael J.
  • Bergens, Steven H.

• Ir–Ni oxide nanoparticles were simply prepared by stirring IrCl3 and NiCl2 precursors in aqueous base under air. The activities of a series of IrNiyOx nanoparticles with different Ir-to-Ni ratios were measured toward water oxidation in 0.1 M H2SO4. The Ir-to-Ni ratio was 1:0.125 in the most active catalyst (mass normalized > 140 A g− 1 Ir, electrochemically active surface area normalized > 203 A mmol− 1Ir). The stabilized potential for the galvanostatic oxidation (1 mA cm− 2geometric) was as low as 1.51 VRHE, corresponding to 0.28 V in overpotential.

• Date created

  2015-08-22

• Subjects / Keywords

  • Water oxidation
  • Water electrolyzer
  • Nickel
  • Iridium
  • Oxygen evolution

• Type of Item

  Article (Published)

• DOI

  https://doi.org/10.7939/R3DZ03H1P

• License

  Attribution-NonCommercial 4.0 International