Abstract
Effective order of the gold dissolution reaction by cyanide ions, p, transfer coefficient α, and exchange current i 0are measured at constant coverages of the gold surface by lead adatoms, θ. Constancy of θ is ensured by maintaining the time period Δt, during which the electrode is in contact with solution after the renewal of its surface and before taking measurements, constant. Solutions under study contain (0.5–2) × 10–5M lead acetate, 0.05–0.2 M KCN, 0.1 M KOH, and 0.01 M KAu(CN)2. With increasing Δt, quantities p, α, and i 0increase from, respectively, 0.17, 0.1, and 10–5A dm–2(in 0.05 M KCN) to p≅ 1.2, α ≅ 0.45, and i 0≅ 10–4A dm–2. The increase in psuggests that the limiting stage alters in the presence of lead adatoms: in addition to adsorbed cyanide ions, as is the case with pure alkali–cyanide solutions, it involves cyanide ions located outside the adsorption layer. A feasible mechanism for the acceleration of gold dissolution by lead adatoms is offered.
Similar content being viewed by others
REFERENCES
Bek, R.Yu., Kosolapov, G.V., Shuraeva, L.I., et al., Elektrokhimiya, 2001, vol. 37, p. 281.
Cathro, K.J. and Coch, D.E., J. Electrochem. Soc., 1964, vol. 111, p. 1416.
Nicol, M.J., Gold Bull., 1980, vol. 137, p. 105.
Petrii, O.A. and Lapa, A.S., Itogi Nauki Tech., Ser. Elektrokhimiya, 1987, vol. 24, p. 94.
Kokkinidis, G., J. Electroanal. Chem., 1986, vol. 201, p. 217.
Adzič, R., Tripkovi, A., and Markovič, N., J. Electroanal. Chem., 1980, vol. 114, p. 37.
Vasil'ev, Yu.B. and Skundin, A.M., Problemy elektrokataliza (Problems in Electrocatalysis), Bagotzky, V.S., Ed., Moscow: Nauka, 1980, p. 128.
Bek, R.Yu., Elektrokhimiya, 2000, vol. 36, p. 814.
Bek, R.Yu., Rogozhnikov, N.A., and Shuraeva, L.I., Elektrokhimiya, 2000, vol. 36, p. 820.
Po kus, D., Agafonovas, G., and Jurgaitiene, I., Proc. 1997 Joint Int. Meet. Electrochem. Soc. and ISE, Paris, 1997, vol. 2, p. 1070.
Po kus, D., Agafonovas, G., and Jurgaitiene, I., J. Electroanal. Chem., 1997, vol. 425, p. 107.
Bek, R.Yu. and Lavrova, T.A., Izv. Sib. Otd. Akad. Nauk SSSR, Ser. Khim. Nauk, 1971, no. 4, issue 6, p. 102.
. Zelinskii, A.G. and Bek, R.Yu., Elektrokhimiya, 1985, vol. 21, p. 66.
Kenzin, V.I., Novitskii, S.P., Bek, R.Yu., and Polumordvinov, I.S., Zavod. Lab., 1993, no. 8, p. 12.
Yatsimirskii, K.B. and Vasil'ev, V.P., Konstanty nestoikosti kompleksnykh soedinenii (Instability Constants for Complex Compounds), Moscow: Akad. Nauk SSSR, 1959.
Rogozhnikov, N.A. and Bek, R.Yu., Elektrokhimiya, 1981, vol. 17, p. 903.
Spravochnik po elektrokhimii (A Handbook of Electrochemistry), Sukhotin, A.M., Ed., Leningrad: Khimiya, 1981.
Bek, R.Yu., Maslii, A.I., Makhnyr', N.V., and Mal'tseva, A.B., Izv. Sib. Otd. Akad. Nauk SSSR, Ser. Khim. Nauk, 1973, no. 7, issue 3, p. 1401.
Rogozhnikov, N.A. and Bek, R.Yu., Elektrokhimiya, 1987, vol. 23, p. 1440.
Heyrovský, J. and Kůta, J., Základy Polarografie (Fundamentals of Polarography), Prague: Naklad. Czeskoslov. Akad. Ved., 1962.
Vetter, K., Elektrochemische Kinetik, Berlin: Springer, 1961.
Bek, R.Yu. and Rogozhnikov, N.A., Elektrokhimiya, 1995, vol. 31, p. 1221.
Amadelli, R., Markovič, N., and Yeager, E., J. Electroanal. Chem., 1983, vol. 159, p. 391.
Safonova, T.Ya. and Petrii, O.A., Elektrokhimiya, 1998, vol.34, p. 1264.
Adzic, R., Tripkovic, A., and Markovic, N., J. Electroanal. Chem., 1980, vol. 150, p. 79.
Damaskin, B.B. and Petrii, O.A., Vvedenie v elektrokhimicheskuyu kinetiku (Electrochemical Kinetics: An Introduction), Moscow: Vysshaya Shkola, 1975.
Bek, R.Yu., Rogozhnikov, N.A., and Kosolapov, G.V., Elektrokhimiya, 1997, vol. 33, p. 131.
Bek, R.Yu. and Rogozhnikov, N.A., Elektrokhimiya, 1997, vol. 33, p. 629.
Rogozhnikov, N.A. and Bek, R.Yu., Elektrokhimiya, 1996, vol. 32, p. 1444.
Schultze, J.M. and Vetter, K.J., Ber. Bunsen-Ges. Phys. Chem., 1971, vol. 75, p. 470.
Dickertmann, D., Schultze, J.M., and Vetter, K.J., J. Electroanal. Chem., 1974, vol. 55, p. 429.
Angerstein-Kozlowska, H., Conway, B.E., Barnet, B., and Mozota, J., J. Electroanal. Chem., 1979, vol. 100, p. 417.
Angerstein-Kozlowska, H., Conway, B.E., Hamelin, A., and Stoicovicu, L., J. Electroanal. Chem., 1987, vol. 228, p. 429.
Man'ko, L.Yu., Cand. Sci. (Chem.) Dissertation, Kazan: Kazan State Technical Univ., 1994.
Frumkin, A.N., Potentsialy nulevogo zaryada (The Potentials of Zero Charge), Moscow: Nauka, 1979.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Bek, R.Y. Kinetics of Anodic Dissolution of Gold in Alkali–Cyanide Solutions: Effect of Lead Ions. Russian Journal of Electrochemistry 37, 387–393 (2001). https://doi.org/10.1023/A:1016678023433
Issue Date:
DOI: https://doi.org/10.1023/A:1016678023433