While completely eliminating platinum group metals (PGMs) by the use of PGM-free electrocatalysts might seem a rational approach to reduce the costs, achieving sufficient power densities as well as durability of PGM-free electrocatalysts remain a major challenge with currently no clear solution in sight . On the other hand, de-alloyed Pt-alloy (Pt-M) nanoparticles (NPs) with less expensive 3d transition metals (M = Ni, Cu, Co) supported on high surface area carbon supports, are currently the state-of-the-art (SoA) solution to reach the production phase in PEMFCs resulting from their facile and already at scale preparation.