Collect. Czech. Chem. Commun. 1990, 55, 1666-1672

Kinetics of electrode reaction of Eu3+/Eu2+ studied by cyclic voltammetry and tast polarography

Jaroslav Němec and Tomáš Loučka

Research Institute of Inorganic Chemistry, 400 60 Ústí nad Labem


The electrochemical behaviour of europium at the dropping mercury electrode was studied in the medium of 1M-NaClO4, 1M-NaCl, 1M-NaNO3, and 1M-Na2SO4. The curves obtained by Tast polarography and the kinetic parameters (ks, α) for the Eu3+/Eu2+ system in the medium of perchlorate and chloride solutions are in accord with the results published earlier. The kinetic parameters in nitrate and sulphate media are given for the first time. In the medium of nitrates, the electrode reaction is probably accompanied by a chemical reaction.