Quasi-Reversible and Irreversible Voltammograms at Microelectrodes

concentration / mM

10

oxidant

2

cm

/s

6.5×

-6

10

reducing agent

2

cm

/s

6.5×

-6

10

microelectrode radius / μm

10

potential standard

E

0

/ V

0

number of electrons

1

2

3

diffusion coefficient

standard rate constant

k

0

m/s

1.74

When the kinetics of the reaction occuring in cyclic voltammetry is limited, the shape of the voltammogram depends strongly on the kinetic parameter: the standard rate constant

k

0

.

This Demonstration shows a simulation of cyclic voltammetry with a microelectrode in steady state and under quasi-reversible and irreversible kinetics.