Mass transport and kinetic aspects of thionyl chloride reduction at the platinum microelectrode

The mass transport and electrochemical kinetic characteristics during the e lectrochemical reduction of thionyl chloride were investigated using a plat inum microdisk electrode. Diffusion coefficients and standard rate constant s were determined from fast scan cyclic voltammetric, chronoamperometric, a nd pulse voltammetric measurements. Activation energies of the diffusion pr ocess, as well as the electron transfer process, have also been determined. The results indicate that in 0.5 M LiAlCl4/SOCl2 solutions the activation energies are much higher than those obtained at higher concentrations. (C) 2001 Elsevier Science B.V. All rights reserved.