Determination of kinetic parameters of the FeCl3/FeCl2 system via a novel treatment of chronoamperometric data

摘要

Computer based methods for the processing of chronoamperometric data via convolutions are discussed. On the example of the quasi-reversible Fe3+/Fe2+ couple, their application for data acquisition and determination of the heterogeneous electrochemical parameters is demonstrated. The plot of Delta Q/Delta i vs. Delta root t/Delta i is superior to that employing i/I-1, being less sensitive to distortions by charging currents once these have died away and by the effects of damping on the initially rapidly varying currents. Cyclic voltammetry is often combined with convolution or deconvolution, and digital simulation studies are also frequently performed to confirm the results.