ELECTROCHEMICAL PROPERTIES OF THE INTERFACES IN SENSORS BASED ON A LAF3 SINGLE-CRYSTAL

Interphase processes at the LaF3-Me interface (Me = Te, Se, Tl) are st udied by cyclic and inversion voltammetry. The influence of the potent ial that corresponds to the anodic generation of an intermediate phase at the LaF3-Me interface (M = Sn, Bi, Sb) on the kinetics of the phas e formation and the interface regeneration is discussed. Linear region s are discovered in the dependence of the peak currents of the cathodi c curves on the charge consumed during phase generation. It is shown t hat the two-phase LaF3-Sb interface can be transformed into a three-ph ase interface, thus forming an oxygen-sensitive element.