Abstract
The electrochemical properties of RuO2 electrodes are studied by means of cyclic voltammetry, potential step, and impedance measurements in aqueous 0.5 mol/dm3 H2SO4 as a supporting electrolyte solution and applying the hanging electrolyte meniscus technique. Two types of the electrodes are used: bulk “as-grown” single-crystal having (101) exposed interface and 500 nm film produced by reactive RF magnetron sputtering at 450°C. The surface structure of the RuO2 electrodes prepared by different techniques is defined from X-ray LAUE backscattering. Experimental data show that, for both RuO2 electrodes, the charging components include a slow diffusion-controlled contribution, due to proton injection–ejection. The diffusion characteristics and the diffusion coefficients for the same electrodes are estimated and reported.
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Doubova, L.M., De Battisti, A., Daolio, S. et al. Effect of Surface Structure on Behavior of RuO2 Electrodes in Sulfuric Acid Aqueous Solution. Russian Journal of Electrochemistry 40, 1115–1122 (2004). https://doi.org/10.1023/B:RUEL.0000048642.73284.4f
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DOI: https://doi.org/10.1023/B:RUEL.0000048642.73284.4f