Patent ID: 7666812
Filing Date: 2010-02-23
Classification: C23C,C25B,H01M,Y02E,Y10S

Abstract:
1. A method for combining a catalyst with carbon for use in a gas diffusion electrode reaction layer, wherein the catalyst comprises the formula A 1−x A′ x (B 1−y B′ y ) z O 3+δ , wherein A comprises at least one metal chosen from La, Pr and Nd; wherein A′ comprises at least one metal chosen from K, Rb, Cs, Ca, Sr and Ba; wherein B comprises at least one metal chosen from Mn and Co; wherein B′ comprises at least one metal chosen from Fe and Ni; wherein x has a value in the range of about 0.01 to about 0.9; wherein y has a value in the range of about 0 to about 0.9; wherein δ has a value in the range of about −0.3 to about 0.3; and wherein z has a value in the range of about 0.95 to about 1.05, the method comprising the steps of: preparing an aqueous solution comprising at least one metal salt as a catalyst precursor at a predetermined molar ratio, and carbon; heating the aqueous solution in a non-oxidizing atmosphere to a gel and further heating said gel to form a char; and calcining the char to form a mixture comprising the catalyst and carbon.