Process for producing a catalyst for a fuel cell, the electrode assembly and a fuel cell

Method for producing a catalyst for a fuel cell of the present invention, a carbon-containing gas at a temperature in the range of under 400 ° C. to 1200 ° C. in the presence of a metal catalyst or alloy catalyst by thermal decomposition reaction, producing a fibrous nanocarbon fibrous nanocarbon manufacturing process S10, and iron-based transition metal catalyst particle attaching step S20 of depositing the iron-based transition metal catalyst particles on the surface of the fibrous nanocarbon, a fibrous nanocarbon in a temperature range of 200 ° C. to 600 ° C. by contacting an oxidizing gas, a tunnel-type mesopores forming step S30 of forming the tunnel-type mesopores fibrous nanocarbon, a precious metal catalyst particles supporting step (S40) supporting the noble metal catalyst particles in the tunneling mesopores the including in this order. Therefore, according to the manufacturing method of the catalyst for a fuel cell of the present invention it can be to produce a fuel cell catalyst which can obtain a high fuel cell efficiency than conventional.