Standard charge transfer rate constants for Nb(V)/Nb(IV) redox pairs in fluoride melts

摘要

Standard charge transfer rate constants (ks) were defined for Nb(V)/Nb(IV) redox couples in NaF-KF (eutectic)-K _2NbF _7, KF-K _2NbF _7, and CsF-K _2NbF _7 melts using the cyclic voltammetry technique. It was established that in fluoride melts, the ks values change in the following order depending on the composition of the second coordination sphere: ks (CsF) < k _s (KF) < k _s (NaF-KF).