Optimization of Oxygen Activation Fuel-Cell Electrocatalysts by Combinatorial Designs



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Triple-A rating: The screening of electrode materials by a quaternary mixture experimental design based on the crystalline system (La, Pr, Sm, Ba)0.58Sr0.4Fe0.8Co0.2O3−δ allows the identification of highly active oxygen activation fuel-cell electrocatalysts. The combination of three different A-elements in the crystalline perovskite structure results in the occurrence of synergetic effects. The best element combinations show a low electrode polarization resistance and a low activation energy.