A homogeneous suspension composed of platinum on carbon (40 wt.% Pt/C and 60 wt% Pt/C), Aquivion® (D79-25BS, liquid dispersion, 25% in water, PFSA eq. wt. 790 g.mol−1 SO3H, stabilized CF3 polymer chain ends, Sigma-Aldrich Chemie GmbH, Schnelldorf, Germany) and a mixture of organic solvents (50 Vol.% ethylene glycol, 50 Vol.% propylene glycol methyl ether) was prepared.