In contrast to the aforementioned studies that found a strong cation effect, Alia et. al. who conducted a thorough study on various commercially available NaOH and KOH, did not find substantial differences in the HOR/HER performance in the purest products, in line with our findings. Overall, we think that while we cannot exclude the "cation-effect" per se, it appears that it is mostly a result of a combination of varying levels of electrolyte impurities where the potential window on the SHE scale, the cell volume, rotation speed, the initial potential on the counter electrode, and other parameters will determine the magnitude of this effect.