Abstract
The size effect of copper wire radius (0.04–0.82 mm) on the diffusion-limited current density of an oxygen reduction reaction in stagnant simulated seawater (naturally aerated 0.5 mol/L NaCl) is investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) and compared with the results obtained in 0.5 mol/L H2SO4. In the oxygen diffusion-limited range, size effect is found to occur independent of electrolytes, which is attributed to non-linear diffusion. Additionally, to satisfy application in a marine setting, an empirical equation correlating oxygen diffusion-limited current density to copper wire radius is proposed by fitting experimental data.
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Supported by the National Natural Science Foundation of China (No. 50971118)
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Lu, Y., Xu, H., Wang, J. et al. Predicting size effect on diffusion-limited current density of oxygen reduction by copper wire. Chin. J. Ocean. Limnol. 29, 75–79 (2011). https://doi.org/10.1007/s00343-011-9953-5
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DOI: https://doi.org/10.1007/s00343-011-9953-5