Measurement of The Impedance Parameters
Plotting the Nyquist diagram with a potentiostat and an impedance analyzer, most often included in modern potentiostats, allows the user to determine charge transfer resistance, double layer capacitance and ohmic resistance. The exchange current density can be easily determined measuring the impedance of a redox reaction for .
Nyquist diagrams are made of several arcs for reaction more complex than redox reaction and with mass-transfer limitation.
Read more about this topic: Dielectric Spectroscopy
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