| 摘要 |
PROBLEM TO BE SOLVED: To provide a catalyst which is not corroded in an acidic electrolyte or at a high potential, is excellent in durability and has high oxygen reduction activity.SOLUTION: The oxygen reduction catalyst of the present invention comprises an oxycarbonitride of titanium represented by the composition formula TiCNO(where x, y and z represent a ratio of the numbers of atoms and satisfy the conditions of 0<x, 0<y, 0.1≤z<2.0). Here, x, y and z preferably satisfy further conditions of 1.0<x+y+z≤2.0 and 2.0≤4x+3y+2z. |
