CATALYST, PROCESS FOR PRODUCTION OF THE SAME, AND USE OF THE SAME

摘要

Catalysts of the invention are not corroded in acidic electrolytes or at high potential and have excellent durability and high oxygen reducing ability. The catalysts include a niobium oxycarbonitride represented by a compositional formula NbC x N y O z (wherein x, y and z represent a ratio of the numbers of the atoms, 0.05 ‰¤ x < 0.7, 0.01 ‰¤ y < 0.7, 0.4 ‰¤ z < 2.5, 1.0 < x + y + z < 2.56, and 4.0 ‰¤ 4x + 3y + 2z).