Comparing the two schemes for mass-transport correction, we observe that the general KL correction according to Eq. ( ) (solid lines in Fig. ), which, in principle, is the more accurate method accounting for both forward (HOR) and backward (HER) reactions, yields slightly larger kinetic currents at low overpotentials than the simplified KL correction according to Eq. ( ) (dashed lines in Fig. ). This trend is confirmed by simulated RDE curves of a Butler-Volmer model presented in the supplementary material, Fig. . We thus conclude that, indeed, the general correction scheme provides more accurate kinetic data at low overpotentials. At increased overpotentials, the kinetic currents obtained from both methods merge, which is expected due to the contribution of the reverse reaction to the measured current becoming negligible.