A double logarithmic method in thin-layer spectroelectrochemistry for distinction among mechanisms of an irreversible electrochemical process

A simple double logarithmic method in potential-controlled thin-layer spect roelectrochemistry for an irreversible electrochemical process has been stu died by numerical analysis and examined by experimental examples. This simp le algorithm has a novel function offering some important information about the mechanism of a complex electrochemical process directly from a limited amount of potential-spectrum data, and can be used to distinguish differen t reaction mechanisms such as E, EC, EE, as well as to determine the electr on-transfer coefficient, a, and the kinetically modified E-0'. Combination of the double logarithmic method with nonlinear regression provides a power ful tool to examine the proposed mechanism and also to estimate other therm odynamic and kinetic parameters. (C) 1999 The Electrochemical Society. S001 3-4651(98)06-090-X. All rights reserved.