Molybdenum and Tungsten Nanostructures and Methods for Making and Using Same

Abstract

The present invention provides molybdenum and tungsten nanostructures, for example, nanosheets and nanoparticles, and methods of making and using same, including using such nanostructures as catalysts for hydrogen evolution reactions.

1 - 7 . (canceled) 
     
     
         8 . Metal-molybdenum carbide nanosheets comprising M a Mo b C x  wherein M is selected from the group consisting of Ni, Co, Cu, Fe, Ga, Ge, Mn, Cr, V, Ti, Zr, Sc, Y, Nb, Hf, Ta, La, Ce, and mixtures thereof. 
     
     
         9 . The metal-molybdenum carbide nanosheets comprising M a Mo b C x  of  claim 8  wherein M is selected from the group consisting of Ni, Co, Cu, Fe, Ga, Ge, Mn, Cr, V, Zr, Sc, Y and mixtures thereof. 
     
     
         10 . The metal-molybdenum carbide nanosheets comprising M a Mo b C x  of  claim 9  wherein M is selected from the group consisting of Ni, Co, Cu, Fe, and mixtures thereof. 
     
     
         11 . The metal-molybdenum carbide nanosheets comprising M a Mo b C x , of  claim 8  wherein the ratio of a:b is about 1:0.5 to 1:20. 
     
     
         12 . The metal-molybdenum carbide nanosheets comprising M a Mo b C x  of  claim 11  wherein the ratio of a:b is about 1:1 to 1:20. 
     
     
         13 . The metal-molybdenum carbide nanosheets comprising M a Mo b C x  of  claim 12  wherein the ratio of a:b is about 1:1 to 1:10. 
     
     
         14 . The metal-molybdenum carbide nanosheets comprising M a Mo b C x  of  claim 13  wherein the ratio of a:b is about 1:1 to 1:5. 
     
     
         15 . Metal-tungsten nitride nanosheets comprising M a W b N x  wherein M is selected from the group consisting of Ni, Co, Cu, Fe, Ga, Ge, Mn, Cr, V, Ti, Zr, Sc, Y, Nb, Hf, Ta, La and Ce. 
     
     
         16 . Metal-tungsten nitride nanosheets comprising M a W b N x  of  claim 15  wherein M is selected from the group consisting of Ni, Co, Cu, Fe, Ga, Ge, Mn, Cr, V, Zr, Sc, Y and mixtures thereof. 
     
     
         17 . Metal-tungsten nitride nanosheets comprising M a W b N x  of  claim 16  wherein M is selected from the group consisting of Ni, Co, Cu, Fe, and mixtures thereof. 
     
     
         18 . Metal-tungsten nitride nanosheets comprising M a W b N x , of  claim 17  wherein the ratio of a:b is about 1:0.5 to 1:20. 
     
     
         19 . Metal-tungsten nitride nanosheets comprising M a W b N x  of  claim 15  wherein the ratio of a:b is about 1:1 to 1:20. 
     
     
         20 . Metal-tungsten nitride nanosheets comprising M a W b N x  of  claim 19  wherein the ratio of a:b is about 1:1 to 1:10. 
     
     
         21 . Metal-tungsten nitride nanosheets comprising M a W b N x  of  claim 20  wherein the ratio of a:b is about 1:1 to 1:5. 
     
     
         22 . Carbon supported hydrogen evolution reaction catalysts comprising metal-molybdenum carbide nanosheets wherein the metal is selected from the group consisting of Ni, Co, Cu, Fe, Ga, Ge, Mn, Cr, V, Ti, Zr, Sc, Y, Nb, Hf, Ta, La, Ce and mixtures thereof. 
     
     
         23 . The carbon supported catalysts of  claim 22  wherein the carbon is in the form of activated carbon, carbon black, carbon nanotubes, carbon nanohorns, graphene, or reduced graphene oxide. 
     
     
         24 .- 26 . (canceled)