Influence of impurities and catalyst surface characteristics on the oxygen charge transfer reaction in the Pt/YSZ system

► Effect of impurities and catalyst morphology on oxygen charge transfer in Pt/YSZ/O2. ► Different catalysts contain different types and amount of impurities. ► Impurities and catalyst morphology affect cyclic voltammetry of Pt/YSZ/O2. ► Presence of impurities is more important than morphology in charge transfer reaction.