The redox couple Ti(IV)/Ti(III) electrochemical behaviour in KCl–KF–K2TiF6 melt with addition of alkaline earth metal cations

D. A. Vetrova, S. A. Kuznetsov.

ABSTRACT

  The charge transfer kinetic for the redox couple Ti(IV)/Ti(III) in the KCl–KF(10 wt. %)–K₂TiF₆ was studied. The standard rate constants of charge transfer (k_s) for the redox couple Ti(IV)/Ti(III) in the KCl–KF(10 wt. %)–K₂TiF₆ melt and the activation energies of charge transfer were calculated. Influence of strongly polarizing cations on the charge transfer kinetics was studied. It was determined the linear dependence of k_s on ionic potential of alkali earth metal cation. The activation energies of charge transfer in case of strongly polarizing cations addition were calculated.

KEYWORDS:

melt, redox couple, titanium complexes, quasi-reversible process, cyclic voltammetry, standard rate constants of charge transfer

DOI:10.31857/S0235010620300015