Ring–disc electrodes. Part 18.—Collection efficiency for high frequency a.c.

Abstract

By using contour integration to invert the Laplace transforms, an analytical expression for the first order kinetic collection efficiency for a ring–disc electrode can be obtained for values of κ > 3. One can then obtain analytical results for the phase shift and amplitude of the ring current with respect to the disc current when an alternating current is passed through the disc. Hence, theoretical results for the complete frequency range can now be obtained. Theory and experiment are found to be in good agreement.