Platinum Monolayer Electrocatalysts for the Oxygen Reduction Reaction: Improvements Induced by Surface and Subsurface Modifications of Cores : Figure 7

(a)

(b)

Figure 7: Voltammetry curves for the Pt_ML/Br-treated-Pd₃Co/C (a), and polarization curves for the ORR (b) in a stability test involving 25,000 potential cycles [22].