Digital Simulation of a Rotating Double‐Ring‐Electrode

Abstract
A rotating double‐ring electrode has been constructed consisting of two parallel platinum rings separated by a small distance. The electrode allows to perform electrochemiluminescence (ecl) experiments in a more efficient manner than by means of the rotating ring‐disc electrode. The method of digital simulation has been employed to calculate velocities of flow as well as concentration changes due to electrochemical and chemical reactions. The comparison of the results of digital simulation with the experimental data for both the ring current and eel intensity shows (i) that the theoretical assumptions made to evaluate the velocities of flow are valid and (ii) that digital simulation generally may be used to describe the mass transport at more complicated electrode systems for which an analytical solution of the convection problem is practically impossible.