A homogenized dispersion of a platinum on carbon powder (Tanaka; 46.7% Pt on C) in a methanol (Acros Organics; 99.9% for HPLC), deionized water and 5% 1100 EW PFSA in alcohol (Ion Power,Inc.) mixture was sprayed onto the membranes to give 25 cm2 catalyst coated membranes (CCMs).