Determination of the selenium (VI)/(IV) standard redox potential by cyclic voltammetry

An electrochemical investigation of selenium, using cyclic voltammetry, has been carried out to determine the standard redox potential of the following reaction: The Se(VI)/(IV) half-wave potentials were measured in alkaline sodium perchlorate solutions as a function of molality of a sodium ion. Extrapolation of the experimental data to the standard state using specific ion interaction theory yields the following standard redox potential and ion interaction coefficients: