POTENTIODYNAMIC INVESTIGATION OF THE CATHODIC PROCESSES IN CERIUM(III), NEODYMIUM(III), AND DYSPROSIUM(III) SALT-SOLUTIONS

The cathodic processes occurring in slightly acidic solutions of ceriu m(III), neodymium(III), and dysprosium (III) salts were studied potent iodynamically with linear potential scans at platinwn and quiescent me rcury electrodes; these processes are attended by the reduction of wat er molecules coordinated with the metal ions named. The results obtain ed are in harmony with the suggestion that three electrons are transfe rred to each triply charged lanthanide ion while the corresponding tri hydroxy complex is formed. The Tafel slopes b(c)underbar obtained are evidence for slow transfer of the first electron.