Determination of Kinetic Parameters from Steady-State Microdisk Voltammograms
STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY
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Equations are derived for the voltammetric response of an irreversible system in the steady-state regime at a small electrode. Voltammetric data for oxidation of FeII in 0.1 M H2SO4 at circular platinum electrodes of radius 5 and 12.5 micro are analyzed by a semilogarithmic technique and by reciprocal plots analogous to treatments of rotating disk voltammograms. The resulting values of kinetic parameters are standard rate constant ks 1.5 or - 0.2 X .01 cms and anodic transfer coefficient 1- alpha 0.67 or - 0.01. This technique compares favorably with others for determining rate parameters in the same range by virtue of technical and mathematical simplicity. Keywords Microelectrodes, Electrochemical kinetics, Iron, Steady state, Reprints.
- Physical Chemistry
- Numerical Mathematics