Current density (mA.cm Standard test protocol of MEA activation repeated with a difference in 0.38 mg.cm -2 catalyst loading in anode and cathode composition as MEA structure (other components of anode and cathode are similar). In activation procedure, 10 minutes OCV time and then, 0.6 V constant voltage for 60 minutes applied. In next steps, 14 minutes cycling potential between 0.7-0.5 V repeated for 12 times and a constant current 0.2 A.cm -2 for 12 hours was applied. Obtained data are the same as before protocol, exactly.