LINEAR SWEEP VOLTAMMETRY AT CHANNEL ELECTRODES

Theory is presented describing the shape of voltammograms obtained from reversible electrode reactions at channel electrodes. In particular it is established how the wave shape and the half-wave potential depend on the rate at which the potential is scanned. The maximum scan rate at which steady-state voltammograms can be measured is established as a function of electrode geometry and electrolyte flow rate. Experimental measurements involving the reduction of fluorescein are shown to be in good agreement with theory.