Patent ID: 7655346

Claim:
A fuel cell electrode material comprising a cermet which comprises metal particles consisting of cobalt and nickel and electrolyte particles consisting of solid oxides, the electrolyte particles having a smaller particle size than the metal particles, wherein said metal particles comprise 20 to 90 mol % cobalt and the residue of nickel in terms of CoO and NiO, respectively, wherein said electrolyte particles comprise a samarium-doped ceria-based ceramic or a gadolinium-doped ceria-based ceramic, wherein when said cobalt and said nickel are in oxidized forms, CoO and NiO, respectively, in said cermet, said electrolyte particles are contained in an amount of 10 to 70% by weight based on the total amount of said cermet, and wherein said electrode material has an adsorption ability of the order of 0.1 to 10×10 −6 mol/m 2 for each of methane, carbon monoxide and hydrogen gases, when said adsorption ability for the gas is expressed by the formula: the number of adsorbed molecules (mol)/the unit area (m 2 ) of said cermet.