Figure 5
(A) A cyclic voltammogram (CV) of the different electrodes in a PBS solution (50 mM, pH 7.0, 0.9% NaCl) containing 5 mM of [Fe(CN)6]3−/4− (inset: current versus flow rate plot of the chronoamperometric response). (B) The electrochemical impedance spectroscopy (EIS) spectra of the electrodes (inset: a schematic representation of the Randles equivalent circuit model for impedance measurement).
