Table 2. EIS Results for the Three Types of Modified Electrodes.

electrode	Rct (Ω)	CPE (μF)	n	i0 (μA)	k0 (cm s–1)	χ2
bare Pt7	32	4.29	0.829	791	1.17 × 10–2	–
potentiostatic G1-DDSQ-Fc8	214	11.00	0.834	132	2.34 × 10–6	0.0095
potentiodynamic G2-DDSQ-Fc16	194	9.48	0.843	144	2.53 × 10–6	0.0025
potentiostatic G2-DDSQ-Fc16	643	5.40	0.862	42.4	7.29 × 10–7	0.0056