Rotating disk electrode

These working electrodes are used in electrochemical studies when investigating reaction mechanisms related to redox chemistry, among other chemical phenomena.

The disk, like any working electrode, is generally made of a noble metal or glassy carbon, however any conductive material can be used based on specific needs.

This is a contrast to still and unstirred experiments such as cyclic voltammetry where the steady-state current is limited by the diffusion of species in solution.

A reversal would produce a similar i-E curve, which would closely match the forward scan, except for capacitive charging current.

The peak current in a cyclic voltammogram for an RDE is a plateau like region, governed by the Levich equation.