THE STRUCTURAL IDENTIFIABILITY OF THE VOL MER-HEYROVSKY REACTION

The interest of checking structural properties of reactional mechanism s prior to any attempt at estimating their kinetic parameters is illus trated by considering the identifiability of the parameters of the Vol mer-Heyrovsky mechanism. The technique employed applies to any of the small-signal methods used for the study of electrochemical mechanisms. It turns ou that the stationary method and electrochemical impedance spectroscopy do not make it to estimate the kinetic parameters unambig uously, even from noise-free data, contrary to the use of the electrog ravimetric transfer function.