Effect of Structural Characteristics of Binary Palladium-Cobalt Fuel Cell Catalysts on the Activity for Oxygen Reduction

In view of possible use as cathode materials in polymer electrolyte membrane fuel cells, the electrocatalytic activity of palladium-cobalt catalysts for oxygen reduction has been investigated in acid medium. In this minireview, the effect of structural characteristics, such as degree of alloying, particle size and palladium segregation on the alloy surface to form a core-shell system, on the electrocatalytic activity of palladium-cobalt catalysts for oxygen reduction is discussed.