Abstract: A method for manufacturing a part by alloying a precious metal with boron, wherein: a quantity of precious metal reduced to powder form is provided; a quantity of a nano-structured micrometric boron powder is provided; the precious metal powder is mixed with the nano-structured micrometric boron powder to obtain a mixture; the mixture is compacted by applying a uniaxial pressure; the mixture is subjected to a spark plasma sintering or flash sintering treatment, or to a hot isostatic pressing (HIP) treatment, to obtain an ingot of a precious metal/boron alloy, and the ingot is machined to obtain the part, or the ingot is reduced to powder form by a micronisation treatment and the powder is treated to obtain the part. Additionally, a gold/boron alloy.

Abstract: A method for producing a graphene oxide-based compound for an air electrode of a metal-air battery. A nitrogen and sulfur-based organic compound is added to an aqueous suspension of a graphene oxide. The water of the suspension is evaporated in order to obtain a powder. This powder is heated under an inert atmosphere in order to sublime the organic compound and stimulate the incorporation of nitrogen from the organic compound into the graphitic sites of the graphene oxide. The nitrogen and sulfur-doped graphene oxide is added to a second aqueous suspension comprising a cobalt nitrate-based compound. This second suspension is heated in order to form nanoparticles of cobalt oxide at the surface of at least one nitrogen and sulfur-doped graphene oxide sheet.

Abstract: A method for manufacturing a part by alloying a precious metal with boron, wherein: a quantity of precious metal reduced to powder form is provided; a quantity of a nano-structured micrometric boron powder is provided; the precious metal powder is mixed with the nano-structured micrometric boron powder to obtain a mixture; the mixture is compacted by applying a uniaxial pressure; the mixture is subjected to a spark plasma sintering or flash sintering treatment, or to a hot isostatic pressing (HIP) treatment, to obtain an ingot of a precious metal/boron alloy, and the ingot is machined to obtain the part, or the ingot is reduced to powder form by a micronisation treatment and the powder is treated to obtain the part. Additionally, a gold/boron alloy.

Abstract: A method for producing a graphene oxide-based compound for an air electrode of a metal-air battery. A nitrogen and sulfur-based organic compound is added to an aqueous suspension of a graphene oxide. The water of the suspension is evaporated in order to obtain a powder. This powder is heated under an inert atmosphere in order to sublime the organic compound and stimulate the incorporation of nitrogen from the organic compound into the graphitic sites of the graphene oxide. The nitrogen and sulfur-doped graphene oxide is added to a second aqueous suspension comprising a cobalt nitrate-based compound. This second suspension is heated in order to form nanoparticles of cobalt oxide at the surface of at least one nitrogen and sulfur-doped graphene oxide sheet.

Abstract: A nanostructured material consisting essentially of boron. The material is in amorphous form and comprising aggregates of boron nanoparticles. A method of preparation thereof and the uses thereof.

Abstract: The compound according to the invention is a compound of formula (1) Ax W1-yMOyO3, wherein A is chosen from the group comprising the Li, Na, NH4, K and H cations, and it is characterized in that x and y verify the relationships 0?x?1 and 0?y?0.5, and in that it has a crystalline structure of the hexagonal type with a base of WO6 octahedra, said structure having tunnels delimited by 6, 4 and 3 of said octahedra and oriented along the axis c.

Abstract: A nanostructured material consisting essentially of boron. The material is in amorphous form and comprising aggregates of boron nanoparticles. A method of preparation thereof and the uses thereof.

Abstract: The compound according to the invention is a compound of formula (1) Ax W1-yMOyO3, wherein A is chosen from the group comprising the Li, Na, NH4, K and H cations, and it is characterised in that x and y verify the relationships 0?x?1 and 0?y?0.5, and in that it has a crystalline structure of the hexagonal type with a base of WO6 octahedra, said structure having tunnels delimited by 6, 4 and 3 of said octahedra and oriented along the axis c.