Окислительно-восстановительные свойства самария, европия и иттербия в расплаве эвтектической смеси хлоридов натрия, калия и цезия

Abstract

The redox behavior of samarium, europium and ytterbium ions in the ternary NaCl–KCl–CsCl eutectic based melts was investigated between 823 and 1023 K employing cyclic voltammetry on a tungsten working electrode. Ln(II)/Ln(III) (Ln = Sm, Eu, Yb) reductionoxidation is reversible and controlled by diffusion of the electroactive species at the potential scan rates up to 0.1 V/s. The formal standard redox potentials E*Ln(II)/Ln(III) were determined, and the thermodynamic and transport properties of the lanthanide ions estimated.