Fig. 2: Electrochemical analysis and characterisation of the IrOx and IrO₂ electrodes in ethanol-containing electrolytes.
From: Accelerated dissolution of iridium anode in the presence of organic compounds
Chronopotentiometry (CP) of the (a) IrOx electrodes on Ti substrates in 1 M KHCO₃ with ethanol concentrations of 0%, 0.1%, 1%, and 10%, applying an iR correction of 3 Ω. b CP of the IrO₂ and IrOx electrodes on Pt-coated Ti or Ti substrates in 1 M KHCO₃ containing 10% ethanol at a constant current density of 300 mA cm⁻² for 1 h, with iR correction of 3.5 Ω. c CP of the IrOx and IrO₂ electrodes on Pt-coated Ti substrates in 0.5 M H₂SO₄, 1 M KHCO₃, and 1 M KOH, each containing 10% ethanol, at a constant current density of 300 mA cm⁻² for 1 h, with iR correction of 1.5, 3.5, and 1.5 Ω, respectively. d–g SEM images with EDS elemental maps showing the distributions of Ir, Ti, and O of the IrOx and IrO2 electrodes on Ti substrates after CP for 1 h at 300 mA cm⁻² in 1 M KHCO₃ containing 0% or 10% ethanol.
