Spatiotemporal propagation of a non-linear electrochemical reaction over an iron electrode

Propagation of the reaction front of oxide formation and reduction along an iron electrode has been investigated when a self-sustained non-linear current oscillation is proceeding. It has been observed that a resistance inserted between the electrode and the potential source changes the oscillation waveform and the propagation speed of the reduction. This finding shows a coupling between the ohmic potential drop in the solution and the reaction propagation along the electrode.