| 主权项 |
1. A catalyst for promoting a hydrogen evolution reaction, the catalyst comprising a metal nitride having a formula:
M′xM″yNz wherein M′ is selected from the group consisting of Ag, Al, Ca, Co, Cr, Cu, Fe, Ga, In, Li, Mg, Mn, Na, Ni, Sc, Ti, V, Y, Zn, and mixtures thereof; wherein M″ is selected from the group consisting of Hf, Mo, Nb, Re, Ru, Ta, W, Zr, and mixtures thereof; wherein x is a number from 0 to 1; wherein y is a number from 1 to 2; wherein z is a number greater than 1.8 and less than 2.2; and wherein the metal nitride comprises a hexagonal lattice with a four-layered stacking sequence that comprises two formula units of mixed close packed structure with alternating layers of M′ metals in trigonal prismatic coordination and; M′, or M′ and M″ metals in octahedral coordination. |
