Settling Peculiarities of Silver Sulfide Potential in Acetate Media
G. V. Makarov and I. G. Soboleva
Lipetsk State Technical University, ul. Moskovskaya 30, Lipetsk, 398600 Russia
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Received May 26, 2003
Abstract — Peculiarities of the argentite (
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g2S) electrode potential settling in acetic acid–acetate solutions are revealed by electroless chronopotentiometry, voltammetry at low polarization, and measuring the rim (wetting) angle. The process rate and the rate constant for the chalcogenide dissolution in a pre-equilibrium state are calculated from the self-dissolution current and the potential transient, respectively. The zero charge potential is found; the pH effect on the above parameters is revealed. It is shown that the potential-determining reaction involves the metal, rather than sulfide, ions.
-g2S) electrode potential settling in acetic acid–acetate solutions are revealed by electroless chronopotentiometry, voltammetry at low polarization, and measuring the rim (wetting) angle. The process rate and the rate constant for the chalcogenide dissolution in a pre-equilibrium state are calculated from the self-dissolution current and the potential transient, respectively. The zero charge potential is found; the pH effect on the above parameters is revealed. It is shown that the potential-determining reaction involves the metal, rather than sulfide, ions.