9722

Redox Reaction (E) at a Rotating Disk Electrode (RDE)

This Demonstration plots the current density versus potential ( versus ) curve for a redox reaction () under steady-state conditions at a rotating disk electrode. Simulated concentration profiles are shown, along with linearized (piecewise linear) concentration profiles of electroactive species using Levich theory. IUPAC conventions are used.
; .

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The general expression for a Faradaic current density is:
, , , , , ,
with the limiting cases
(Butler–Volmer, electron transfer control),
(Nernstian system, mass transport control).
[1] V. G. Levich, Physicochemical Hydrodynamics, 2nd ed., Englewood Cliffs, NJ: Prentice-Hall, Inc., 1962.
[2] A. J. Bard and L. R. Faulkner, Electrochemical Methods, New York: John Wiley & Sons, 2001.
[3] J.-P. Diard, C. Montella, and B. Le Gorrec, Cinétique Electrochimique, Paris: Hermann, 1996.
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