Abstract
Mudcrack-free oxide films of Ir x Ti1−x O2 (0 < x ≤ 1) on titanium substrates were obtained, and the effects of the oxide composition on the rate of oxygen-evolution reaction were investigated. At x ≥ 0.6, Ir-rich grains appear on the mudcrack-free surface. In the purely single-phase region (0 < x ≤ 0.5), the pseudo-capacitive charge is proportional to the surface composition, x s, and the exchange-current density for the oxygen-evolution reaction increases linearly with x s at 0.2 ≤ x s ≤ 0.5, with an extrapolated intercept at x s ∼ 0.15, below which the oxides are inactive.
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Endo, K., Katayama, Y., Miura, T. et al. Composition dependence of the oxygen-evolution reaction rate on Ir x Ti1−x O2 mixed-oxide electrodes. Journal of Applied Electrochemistry 32, 173–178 (2002). https://doi.org/10.1023/A:1014770015236
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DOI: https://doi.org/10.1023/A:1014770015236