In conclusion, this work provides the guidelines for the stability studies of the state-ofthe-art carbon-supported Pt-alloy electrocatalysts in liquid electrolyte half-cells at close-to-real operational conditions. The most widespread accelerated degradation test (ADT) protocol at the membrane electrode assembly (MEA) level is the one proposed by the US Department of Energy (DoE), which includes 30 000 trapezoid-wave cycles between 0.6-0.95 VRHE with a 3