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Kinetics of Reduction of Glycinate and Alaninate Complexes of Palladium(II) on a Dropping Mercury Electrode at Different Temperatures

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Abstract

Kinetics of electroreduction of glycinate and alaninate complexes of Pd(II) is studied polarographically in a test mode at 15–50°C in solutions of pH 3, 5, 10, and 12 containing free ligands and NaF, Na2SO4, or NaClO4 supporting electrolytes. Diffusion coefficients for Pd(II) complexes are calculated from values of limiting currents. Specifically adsorbed Pd(II) complexes with a composition identical to that in the bulk solution take part in the slow electrochemical stage. The mechanism of reduction of the complexes is temperature-independent and identical to that established earlier at 25°C. The study confirms the earlier assumption as to the mechanism of hindering action of the perchlorate and alaninate ions specifically adsorbed on the positively-charged surface of a mercury electrode on the reduction of these complexes.

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Authors and Affiliations

  1. St. Petersburg State University, Universitetskii pr. 26, Petrodvorets, St. Petersburg, 198504, Russia

    T. G. Nikiforova, V. I. Kravtsov & V. V. Alekseeva

Authors
  1. T. G. Nikiforova
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  2. V. I. Kravtsov
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  3. V. V. Alekseeva
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Nikiforova, T.G., Kravtsov, V.I. & Alekseeva, V.V. Kinetics of Reduction of Glycinate and Alaninate Complexes of Palladium(II) on a Dropping Mercury Electrode at Different Temperatures. Russian Journal of Electrochemistry 39, 709–715 (2003). https://doi.org/10.1023/A:1024872017093

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  • DOI: https://doi.org/10.1023/A:1024872017093

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