The model and experimental de-alloyed Pt-Co/C electrocatalyst by ReCatalyst has been prepared following the processes already reported previously. Briefly, the electrocatalysts have been prepared in three steps. In the first step, Pt NPs have been deposited onto a commercial carbon black support (Ketjen Black EC300J) via the double passivation galvanic displacement method reported elsewhere. In the second step, the prepared composites with deposited Pt NPs have been thermally annealed to obtain an Pt-alloy crystal phase. In the last step de-alloying (acid washing) has been performed in accordance with the work described previously. XRD analysis.