A catalyst used for dehydrogenation of an organic hydrogen-storage material to generate hydrogen, a support for the catalyst, and a preparation process thereof are presented. A hydrogen-storage alloy and a preparation process thereof are also provided. A process for providing high-purity hydrogen, a high-efficiently distributed process for producing high-purity and high-pressure hydrogen, a system for providing high-purity and high-pressure hydrogen, a mobile hydrogen supply system, and a distributed hydrogen supply apparatus are also described.

RF susceptors manufactured by means of 3D printing. 3D-printed susceptors in accordance with the invention include susceptors having solid or mesh walls, where the susceptors are in the form of hollow cylinders, pyramids, spheres, hemispheres, ellipsoids, paraboloids, toroids, or prisms; flat planes; or other hollow or solid three-dimensional shapes. The 3D-printed susceptors can be formed from any suitable starting material, such as tungsten powder, graphite, silicon carbide, molybdenum powder, tantalum powder, rhenium powder, or alloys thereof, or can be formed such that some portions of the susceptors are formed from one or more materials while other portions are formed from different material(s).

A cooling device for cooling a component includes a base element with a first surface and a second surface opposite the first surface and forming a rear side, and with a cooling structure having cooling elements that is arranged on the base element so as to protrude over the first surface. The rear side of the base element has a curved configuration and a prestress. Alternatively or additionally, at least one auxiliary element is arranged on the rear side to create a substance bonding between the cooling device and the component.

The method of producing a solid spherical powder according to the present disclosure includes: a step A of preparing a first powder raw material containing agglomerated particles and/or solidified particles having a particle diameter of 1 μm to 1,000 μm and introducing the first powder raw material into a plasma flame to produce a hollow spherical powder having a surface layer shell having a thickness of 1 μm to 50 μm; a step B of subjecting the hollow spherical powder to pulverization treatment to pulverize a hollow shape of the hollow spherical powder, thus obtaining a second powder raw material which is solid; and a step C of introducing the second powder raw material into a plasma flame, melting and solidifying the second powder raw material to obtain the solid spherical powder.

Disclosed is a method for producing a Heusler-based phase thermoelectric material using an amorphous phase precursor. More specifically disclosed is a method for producing a powder or bulk thermoelectric material having a microstructure including a Heusler-based phase with a thermoelectric effect by crystallization of an amorphous phase precursor prepared by a non-equilibrium processes. Also disclosed is a device using a Heusler-based phase thermoelectric material produced by the method. The method largely avoids the efficiency problems of conventional methods, including low productivity in scaling up caused by long annealing time, high annealing temperature, and contamination during nanopowder production, achieving improved process efficiency. In addition, the method enables efficient production of a thermoelectric material having a nano-sized microstructure that is difficult to produce by a conventional method.

Disclosed is a method for producing a Heusler-based phase thermoelectric material using an amorphous phase precursor. More specifically disclosed is a method for producing a powder or bulk thermoelectric material having a microstructure including a Heusler-based phase with a thermoelectric effect by crystallization of an amorphous phase precursor prepared by a non-equilibrium processes. Also disclosed is a device using a Heusler-based phase thermoelectric material produced by the method. The method largely avoids the efficiency problems of conventional methods, including low productivity in scaling up caused by long annealing time, high annealing temperature, and contamination during nanopowder production, achieving improved process efficiency. In addition, the method enables efficient production of a thermoelectric material having a nano-sized microstructure that is difficult to produce by a conventional method.

An alloy represented by the formula (Mn.sub.xAl.sub.y)C.sub.z, the alloy being aluminum (Al), manganese (Mn), and carbon (C), and optionally unavoidable impurities; wherein x=56.0 to 59.0 y=41.0 to 44.0 x+y=100, and z=1.5 to 2.4. The alloy is highly suitable for forming the ε and ε phase in high purity and high microstructural homogeneity. A method for processing an alloy of formula (Mn.sub.x′Al.sub.y′)C.sub.z′, wherein x′=52.0 to 59.0, y′=41.0 to 48.0, x′+y′=100, and z′=0.1 to 3.0, the process including providing the raw materials of the alloy, melting the raw materials, and forming particles of the alloy by gas atomization of the molten alloy.

Low-cost and earth abundant, Ni.sub.1−xMo.sub.x alloy nanocrystals, with sizes ranging from 18-43 nm and varying Mo composition (0.0-11.4%), were produced by a colloidal chemistry method for alkaline HER reactions. For a water splitting current density of ˜10 mA/cm.sup.2, these alloys demonstrate over-potentials of −62 to −177 mV, which are comparable to commercial Pt-based electrocatalysts (−68 to −129 mV). The cubic Ni.sub.0.934Mo.sub.0.066 alloy nanocrystals exhibit the highest activity as alkaline HER electrocatalysts, outperforming commercial Pt/C (20 wt %) catalyst.

Low-cost and earth abundant, Ni.sub.1−xMo.sub.x alloy nanocrystals, with sizes ranging from 18-43 nm and varying Mo composition (0.0-11.4%), were produced by a colloidal chemistry method for alkaline HER reactions. For a water splitting current density of ˜10 mA/cm.sup.2, these alloys demonstrate over-potentials of −62 to −177 mV, which are comparable to commercial Pt-based electrocatalysts (−68 to −129 mV). The cubic Ni.sub.0.934Mo.sub.0.066 alloy nanocrystals exhibit the highest activity as alkaline HER electrocatalysts, outperforming commercial Pt/C (20 wt %) catalyst.

A cemented carbide includes a first hard phase and a binder phase. The first hard phase is composed of tungsten carbide grains. The binder phase includes cobalt and nickel as constituent elements. An arbitrary surface or arbitrary cross section of the cemented carbide has: a region R1 interposed between an interface between the tungsten carbide grains and the binder phase and an imaginary line A; a region R2 interposed between the imaginary line A and an imaginary line B; and a region R3 other than the region R1 and R2. When a line analysis is performed in a range including the region R1 and the region R3 adjacent to the region R1 with the region R2, a ratio C.sub.5/C.sub.20 of a maximum atomic concentration C.sub.5 at % of cobalt in the region R1 and a maximum atomic concentration C.sub.20 at % of cobalt in the region R3 is more than 1.