The electrochemical redox process Eu(III)/Eu(II), at 673 to 823K, on glassy carbon was studied using transient electrochemical techniques. The results showed that the electroreduction of Eu(III) to Eu(II) was quasi-reversible. The diffusion coefficients of Eu(III) and Eu(II) ions were also calculated (table 100). The validity of the Arrhenius law was verified.

Cathodic behaviour of Europium (III) on Glassy Carbon, Electrochemical Formation of Al4Eu, and Oxo-Acidity Reactions in the Eutectic LiCl-KCl. M.R.Bermejo, F.de la Rosa, E.Barrado, Y.Castrillejo: Journal of Electroanalytical Chemistry, 2007, 603[1], 81-95