Abstract
The effect of the solution volume and deposition potential on the dynamics and final parameters of the deposition process was studied using a mathematical model of codeposition of the two metals within a one-dimensional flow porous electrode (PE). The initial PE characteristics, kinetic parameters of the overall polarization curve, and volume solution flow rate were fixed. It was found that a decrease in the solution volume at a high flow rate apart from the expected consequences (a decrease in the metal deposition rate in time and an increase in the time of the porous matrix filling by the deposit) results in a significant improvement of the uniformity of distribution of electropositive component M1 and a dramatic extension of the deposition region of electronegative component M2. The positive effect of a decrease in the solution volume is enhanced at an increase in the cathodic potential and the closing in of partial currents of the deposited metals. Eventually, these conditions provide simultaneously a high rate of metal recovery and maximum PE filling by the cathodic deposit.
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Original Russian Text © A.I. Maslii, N.P. Poddubny, A.Zh. Medvedev, 2011, published in Elektrokhimiya, 2011, Vol. 47, No. 9, pp. 1089–1095.
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Maslii, A.I., Poddubny, N.P. & Medvedev, A.Z. Effect of circulating solution volume on codeposition process of two metals within porous electrode at high flow rate. Russ J Electrochem 47, 1016–1021 (2011). https://doi.org/10.1134/S1023193511090072
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DOI: https://doi.org/10.1134/S1023193511090072