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The Dissolution of Silver Cathodically Polarized in Acid Chloride Media |
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18.09.2008 г. |
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The Dissolution of Silver Cathodically Polarized in Acid Chloride Media L. E. Volkova, I. K. Marshakov, N. M. Tutukina, and I. V. Kreiser Voronezh State University, Universitetskaya pl. 1, Voronezh, 394006 Russia e-mail:
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Received October 1, 2004 Abstract — The dissolution of silver cathodically polarized in a 1M HCl solution is investigated. It occurs only in the presence of oxygen, is independent of the cathodic potential in a range from 0.00 to –0.45 V, and is determined by the convective experimental conditions and the acidity of the solution. It may be assumed that silver can be oxidized at cathodic potentials because of an increase in the concentration of hydroxide ions adsorbed by the electrode, during the reduction of the dissolved oxygen.
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