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Nyquist plot from EIS of 10 mM [Fe(CN)6]3– in 1 M KCl using unmodified CFME (black), ND-H 5/CFME (green), ND-COOH 5/CFME (purple), ND-COOH 15/CFME (orange), and ND-COOH 60/CFME (blue). Both impedance axes were normalized by electrode surface area.
