Equivalent Circuits Applied in Electrochemical Impedance Spectroscopy and Fractional Derivatives with and without Singular Kernel

Figure 7

Nyquist and Bode diagram for the heterogeneous reaction model, Caputo approach in (a) and (b) and Caputo-Fabrizio approach in (c) and (d). For (a) and (b), , , , , (solid line), (dash line), (dot line), and (dash-dot line). For the capacitor , ; for the capacitor , . For (c) and (d), , , , , (solid line), (dash line), (dot line), and (dash-dot line). For the capacitor , ; for the capacitor , .

(a)

(b)

(c)

(d)