Fig. 4: Electrochemical oxidation mechanisms and performances of the IrOx electrodes in various 1% solutions.
From: Accelerated dissolution of iridium anode in the presence of organic compounds
a Electrochemical oxidation mechanism of ethanol on an Ir electrode in an electrolyte. b Chronopotentiometry (CP) of the IrOx electrodes on Pt-coated Ti substrates in 1 M KHCO₃ containing 1% acetic acid, ethanol, or acetaldehyde at a constant current density of 300 mA cm⁻² for 1 h, with iR correction of 1.8 Ω. c Ir dissolution profiles of the IrOx electrodes during cyclic voltammetry measured using on-line ICP-MS in solutions containing 1% H2O, ethanol, or acetaldehyde. d Electrochemical oxidation mechanism of acetaldehyde on an Ir electrode in an electrolyte. e Compositions of the gases (%, compared without chemical) generated during the reactions in 1 M K₂SO₄ containing 1% acetic acid, formaldehyde, ethanol, or acetaldehyde at a constant current density of 300 mA cm⁻² for 6 min. f CP of the IrOx electrodes on Pt-coated Ti substrates in 1 M KHCO₃ containing 1% butyraldehyde, acetaldehyde, or formaldehyde at a constant current density of 300 mA cm⁻² for 1 h, with iR correction of 4 Ω.
