The present invention(s) is directed to novel conductive M.sub.n+1X.sub.n(T.sub.s) compositions exhibiting high volumetric capacitances, and methods of making the same. The present invention(s) is also directed to novel conductive M.sub.n+1X.sub.n(T.sub.s) compositions, methods of preparing transparent conductors using these materials, and products derived from these methods.

A supported heterogeneous catalyst material for catalyzing the reverse water-gas shift (RWGS) reaction for the selective formation of CO using an alkali metal-doped molybdenum carbide on a gamma alumina support (A-Mo.sub.2C/γ-Al.sub.2O.sub.3, A=K, Na, Li). The A-Mo.sub.2C/γ-Al.sub.2O.sub.3 catalyst is synthesized by co-impregnation of molybdemun and alkali metal precursors onto a γ-Al.sub.2O.sub.3 support. It is then carburized to form the A-Mo.sub.2C/γ-Al.sub.2O.sub.3.

A supported heterogeneous catalyst material for catalyzing the reverse water-gas shift (RWGS) reaction for the selective formation of CO using an alkali metal-doped molybdenum carbide on a gamma alumina support (A-Mo.sub.2C/γ-Al.sub.2O.sub.3, A=K, Na, Li). The A-Mo.sub.2C/γ-Al.sub.2O.sub.3 catalyst is synthesized by co-impregnation of molybdemun and alkali metal precursors onto a γ-Al.sub.2O.sub.3 support. It is then carburized to form the A-Mo.sub.2C/γ-Al.sub.2O.sub.3.

Provided is a three-phase system V.sub.2O.sub.3/VN/Mo.sub.2C nanoelectrode material, and a preparation method and application thereof. The nanoelectrode material comprises V.sub.2O.sub.3 particles, VN particles, and Mo.sub.2C particles. The V.sub.2O.sub.3 particles, VN particles, and Mo.sub.2C particles are interlaced in lattice stripes and are uniformly distributed. The mass ratio of the V.sub.2O.sub.3, VN and Mo.sub.2C is (1 to 4):(10 to 40):(4 to 16). The above-mentioned three kinds of nanoparticles are intertwined to form more incoherent interface area. The increase in the area of the incoherent interface area will cause more defects, so that more active sites are provided, and the hydrogen production performance is improved.

Provided is a three-phase system V.sub.2O.sub.3/VN/Mo.sub.2C nanoelectrode material, and a preparation method and application thereof. The nanoelectrode material comprises V.sub.2O.sub.3 particles, VN particles, and Mo.sub.2C particles. The V.sub.2O.sub.3 particles, VN particles, and Mo.sub.2C particles are interlaced in lattice stripes and are uniformly distributed. The mass ratio of the V.sub.2O.sub.3, VN and Mo.sub.2C is (1 to 4):(10 to 40):(4 to 16). The above-mentioned three kinds of nanoparticles are intertwined to form more incoherent interface area. The increase in the area of the incoherent interface area will cause more defects, so that more active sites are provided, and the hydrogen production performance is improved.

A coating that is configured for use on parts of a control valve. The configurations may incorporate various material layers, preferably that form a layered structure on a base or substrate (for example, an Inconel body). In one implementation, the layered structure can be arranged as “stacked” individual layers that exhibit different concentrations or ratios of materials, including by example tungsten carbide and nickel alloy. The concentration of tungsten carbide may increase from an innermost layer to an outer most layer. This feature can extend service life of the parts, particularly when in use with highly-erosive process fluids, like particle-entrained fluids commonly found in hydrocracking or refining operations. Manufacture of the layered structure on the parts may require use of additive manufacturing technology in order to deposit layers of material of varying composition and thickness on the unique fluted design contemplated herein.

A coating that is configured for use on parts of a control valve. The configurations may incorporate various material layers, preferably that form a layered structure on a base or substrate (for example, an Inconel body). In one implementation, the layered structure can be arranged as “stacked” individual layers that exhibit different concentrations or ratios of materials, including by example tungsten carbide and nickel alloy. The concentration of tungsten carbide may increase from an innermost layer to an outer most layer. This feature can extend service life of the parts, particularly when in use with highly-erosive process fluids, like particle-entrained fluids commonly found in hydrocracking or refining operations. Manufacture of the layered structure on the parts may require use of additive manufacturing technology in order to deposit layers of material of varying composition and thickness on the unique fluted design contemplated herein.

A tungsten carbide powder 1 includes bonded bodies 10 each including a plurality of tungsten carbide crystal grains 11, in which the bonded bodies 10 include, at a grain boundary 11a between the plurality of tungsten carbide crystal grains 11, a chromium-concentrated region 12 which has a chromium concentration higher than that in the tungsten carbide crystal grains 11.

Provided is a tungsten carbide powder satisfying such a condition that when the Fsss particle size thereof is represented by a (μm) and the BET particle size thereof converted from the BET specific surface area is represented by b (μm), a is 0.40 μm or more and 1.50 μm or less, and b/a is 0.17 or more and 0.35 or less.

Provided is a tungsten carbide powder satisfying such a condition that when the Fsss particle size thereof is represented by a (μm) and the BET particle size thereof converted from the BET specific surface area is represented by b (μm), a is 0.40 μm or more and 1.50 μm or less, and b/a is 0.17 or more and 0.35 or less.