Electrochemical oxidation of terbium(III) in aqueous media: influence of supporting electrolyte on oxidation potential and stability

Apart from the generally dominant trivalent oxidation state, several lanthanides can occur in divalent or tetravalent states as well. Changing valence state alters chemical properties and, therefore, gives opportunity to ease intragroup lanthanide separations. The hydrated terbium(III) ion has a highly positive reduction potential (E0 = + 3.1 V vs. SHE), but it be oxidized its via ozonolysis electrolysis, and stabilized concentrated carbonate solutions. In this study, is electrochemically terbium(IV) aqueous carbonate, nitrate, periodate media. Spectroscopic elemental analysis were done characterize gain insight stability of these complexes electrolytes periodate. all electrolytes, stabilization achieved at different pH, terbium concentration, salt concentration applied potentials. most promising electrolyte was found since allowed attain more stable