Patent ID: 8632929

Claim:
An oxygen reduction electrode comprising: a current collector; a gas diffusion layer; and a catalyst layer consisting of: polyvinylidene fluoride, carbon impregnated with a metal catalyst, and at least one metalloporphyrin derivative represented by Formula 1 below, the at least one metalloporphyrin derivative being bound chemically to the surface of the metal catalyst: wherein, each of R 1 , R 3 , R 5 , and R 7 is independently a C 1-20 alkyl group; each of R 2 , R 4 , R 6 , and R 8 is independently a C 2-20 carboxylalkyl group or a C 1-20 alkylene group, where at least one of R 2 , R 4 , R 6 , and R 8 is a C 2-20 carboxylalkyl group and at least one of R 2 , R 4 , R 6 , and R 8 is a C 1-20 alkylene group; M is Fe, Co, Ni, Zn, Sn, or Cu; X − is a halogen anion; and n is 2, 3, or 4.