Abstract
The gold dissolution rate in alkali–cyanide solutions with and without bismuth hydroxy compounds is studied as a function of potential E, with the electrode surface renewed before taking measurements. At E < 0 (NHE), these ions accelerate the process. At more positive E, their influence is ambiguous. At negative potentials, the effect depends on the time of electrode contact with solution prior to beginning the measurements, the scan rate of E, and the KCN and KOH concentrations. Possible approaches are suggested to explaining the established regularities.
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Bek, R.Y. Anodic Dissolution of Gold in Cyanide Solutions Containing Bismuth Hydroxy Compounds. Russian Journal of Electrochemistry 38, 398–406 (2002). https://doi.org/10.1023/A:1015339921738
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DOI: https://doi.org/10.1023/A:1015339921738