Cyclic Voltammetry for an Electro-Adsorption Reaction (EAR)

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.