Similar observations on the presence of Cu in the membrane and in the anode have been reported recently . One possible solution to mitigate this has been demonstrated by P. Mani and co-workers , where an already fabricated CCM was exposed to another round of acid washing. However, this solution is not suitable for any kind of mass production of MEAs. Thus, solutions are necessary on the level of catalyst production. Consequently, improved fundamental understanding of the influence of chemical activation (de-alloying) on the electrochemical behavior of Pt-alloy electrocatalysts is critical.