Oxygen crossover effect on palladium and platinum based electrocatalysts during formic acid oxidation studied by scanning electrochemical microscopy

SECM is proved as a fast and powerful technique for studying O2 crossover effect in different electrocatalysts and for identifying highly selective electrocatalysts candidates for MRFCs. In particular, among the samples evaluated, Pt75Pd25 NPs present the highest average performance for FAOR in 0.5 M H2SO4 solution in the presence of O2 within the potential range under study (0.3-0.7 V vs RHE).