In Fig. I have illustrated both cases with different activities of the reductant system on an overpotential scale (𝐸 -𝐸 𝑒𝑞 ). While in the case for 𝜆 = 1 (Fig. ) the result is indistinguishable from the B-V model, for 𝜆 = 0 several important differences appear. First, the i-V curves up to a certain overpotential are very similar to each other and so is the micropolarization exchange current density. Its value is nearly constant until very low reductant activities. Secondly, while the Tafel slope is close to 118 mV/decade like in the case for the B-V, it approaches 236 mV/dec when the effective coverages in the EDL become very small. The i-V curves behave then like in the case of the B-V model in respect to changes in reductant activities, but with twice its Tafel slope. One can therefore separate the case for 𝜆 = 0 into two different regimes: One at a Tafel slope of around 118 mV/decade where the current is not sensitive to reactant activities and one at twice the Tafel slope where it is sensitive to reactant activities mimicking the B-V model. The transition between these cases is very sensitive to the values of 𝔾 ‡⊖ , 𝔾 𝑅𝑒𝑑 ⊖ , 𝔾 𝑂𝑥 ⊖ , and 𝑔 𝑖 , while 𝑥 𝑖 > (HOR/HER) or multiple intermediates (ORR/OER) bound to the metallic surface from which an electric field is exerted. This suggests that such transfers occur close to the surface and within the EDL. In such case the kinetics should follow an alternative kinetic description which I have outlined here. This kinetic description is testable as it predicts regions of lower and higher Tafel slopes that differ in the current response to changes in reactant activities. Evidence for this behavior may already been found by the reaction kinetics of the H-upd being constant over a wide pH range in various electrolytes on Pt(111) and Pt(pc).