| abstract |
A fuel cell electrode catalyst having high catalytic activity is provided. A catalyst containing at least one element A selected from the group consisting of boron, phosphorus and sulfur, a metal element, carbon, nitrogen, oxygen, and fluorine, the metal element constituting the catalyst, carbon, nitrogen When the ratio of the number of atoms of oxygen, the element A, and fluorine is expressed as metal element: carbon: nitrogen: oxygen: the element A: fluorine = 1: x: y: z: a: b, 0 <x ≦ 9 0 <y ≦ 2, 0 <z ≦ 5, 0 <a ≦ 1, and 0 <b ≦ 2. [Selection figure] None |