A refined pH dependency of 𝑖 0,𝑚𝑖𝑐𝑟𝑜 for polycrystalline Pt is challenged by mass transport limitations in acidic environment and by both mass transport limitations and a yet not well understood interplay between pH, type and concentration of electrolyte cations, and electrode potential in alkaline environment . Different pH buffer solutions have been employed to overcome proton/hydroxide transport limitations at intermediate pH , , , but with a questionable influence of the buffer solution and the employed mass transport correction and fitting approach on the derived kinetics.