WOLFRAM|DEMONSTRATIONS PROJECT

Cyclic Voltammetry for an Electro-Adsorption Reaction (EAR)

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log λ
0.
g
0.
r
0.
K
0.
This Demonstration shows a numerical simulation of the cyclic-voltammetric response for a one-step electro-adsorption reaction (
-
A
+s⟷A,s+
-
e
) involving the soluble species
-
A
, with constant concentration in the electrolyte, together with the adsorbate
A,s
and free sites
s
at the electrode surface. The thermodynamics is described by the Frumkin isotherm. Cyclic voltammogram and surface coverage versus potential curve are plotted. You can experiment with the effects of electro-adsorption kinetics, the interaction parameter in the adsorbed phase, the electrolyte resistance, and the double-layer capacitive effects using the controls for the relevant dimensionless parameters.