Voltammetry at a Rotating and a Stationary Very Thin Ring Electrode

Abstract

A very thin ring electrode (VTRE) inlaid in an insulating glass plane has been fabricated and studied. Its inner radius was 4 mm and its width was 0.7 μm. Current‐potential and current‐time behavior for the reduction of ferricyanide in potassium chloride and iodine in excess iodide were studied at the rotating and the stationary very thin ring electrode. Comparison of the electrochemical data with theory indicated that the ring electrode was approximately 0.3 μm below the surface of the insulating plane. This conclusion was verified by means of scanning electron microscopy.