Abstract: A catalyst comprises a carbide or nitride of a metal and a promoter element. The metal is selected from the group consisting of Mo, W, Co, Fe, Rh or Mn, and the promoter element is selected from the group consisting of Ni, Co, Al, Si, S or P, provided that the metal and the promoter element are different. The catalyst also comprises a mesoporous support having a surface area of at least about 170 m2 g?1, wherein the carbide or nitride of the metal and the promoter element is supported by the mesoporous support, and is in a non-sulfided form and in an amorphous form.

Abstract: The present disclosure discloses bimetal catalysts.

Abstract: The present disclosure discloses graphene supported bifunctional catalysts and metal-air batteries comprising the same. In one aspect, a metal-air battery comprises a metal anode, a cathode, an electrolyte disposed between the metal anode and the cathode, and a catalyst on the cathode. The catalyst reduces both the charge overpotential and discharge overpotential of the battery. The catalyst is disposed on a graphene support.