Abstract: A method for manufacturing cubic diamond nanocrystals (10) comprising the following successive steps: (a) providing crystalline diamond powder where the maximum particle size of the powder is equal or more than 2 ?m and equal or less than 1 mm; (b) milling said crystalline micron diamond powder using nitrogen jet milling micronization so as to manufacture a fine powder; (c) nanomilling the fine powder of step b) using a planetary tungsten carbide ball mill; (d) acid treating the nanomilled powder of step c); (e) extracting the cubic diamond nanocrystals (10) by centrifugation. Advantageously round-shaped cubic diamond nanocrystals are manufactured.

Abstract: A method for manufacturing cubic diamond nanocrystals (10) comprising the following successive steps: (a) providing crystalline diamond powder where the maximum particle size of the powder is equal or more than 2 um and equal or less than 1 mm; (b) milling said crystalline micron diamond powder using nitrogen jet milling micronization so as to manufacture a fine powder; (c) nanomilling the fine powder of step b) using a planetary tungsten carbide ball mill; (d) acid treating the nanomilled powder of step c); (e) extracting the cubic diamond nanocrystals (10) by centrifugation. Advantageously round-shaped cubic diamond nanocrystals are manufactured.

Abstract: The invention relates to a fuel cell (1) comprising an anode (10) capable of oxidizing a first compound M1 into first ions M(m+) with m being a non-zero integer, a first electrolyte (20) which is capable of conducting these first ions M(m+), and which is in contact with said anode (10), a cathode (50) capable of reducing a second compound N2 into second ions N(n?) with n being a non-zero integer, a second electrolyte (40) which is capable of conducting the second ions N(n?), and which is in contact with said cathode (50), a porous central membrane (30), one of the faces of which is in contact with said first electrolyte (20) and the opposite face of which is in contact with said second electrolyte (40). The first electrolyte (20), the second electrolyte (40), and the central membrane (30) consist of the same material which is capable of both conducting M(m+) ions and N(n?) ions.

Abstract: A method for manufacturing cubic diamond nanocrystals (10) comprising the following successive steps: (a) providing crystalline diamond powder where the maximum particle size of the powder is equal or more than 2 um and equal or less than 1 mm; (b) milling said crystalline micron diamond powder using nitrogen jet milling micronization so as to manufacture a fine powder; (c) nanomilling the fine powder of step b) using a planetary tungsten carbide ball mill; (d) acid treating the nanomilled powder of step c); (e) extracting the cubic diamond nanocrystals (10) by centrifugation. Advantageously round-shaped cubic diamond nanocrystals are manufactured.

Abstract: This invention concerns a high temperature fuel cell with mixed anionic and protonic conduction having a protonic conduction reforming membrane directly coupled to a solid oxide fuel cell with conduction by oxygen ions, enabling use of a gradually reforming anode generating carbon deposits to be avoided. The reverse operation of the present invention outside the reforming stage forms a high water temperature electrolyser to produce hydrogen efficiently without having to separate it from water as is the case with current systems.

Abstract: This invention concerns a high temperature fuel cell with mixed anionic and protonic conduction having a protonic conduction reforming membrane directly coupled to a solid oxide fuel cell with conduction by oxygen ions, enabling use of a gradually reforming anode generating carbon deposits to be avoided. The reverse operation of the present invention outside the reforming stage forms a high water temperature electrolyser to produce hydrogen efficiently without having to separate it from water as is the case with current systems.