The intercept of each best fit line at a capacity of zero yields the extrapolated pseudo-steady- Rs + Rp = 3.52 Ω cm 2 (Fig. ). The appearance of a well-defined Tafel slope after IR correction indicates that the IR correction is successful (Fig. ). Nonetheless, the IR correction may be imperfect, which could lead to a slight inaccuracy of the measured values of α and I0. The overpotential versus current data were fitted to both a one-step BV model (Eqs. 9 -13) and a Tafel model (Eq. 14 (Fig. ). This translates to a proportionally lower measured I0 value for DC than for EIS measurements, according to: