NOVELTY - Device for the electrolytic production of hydrogen from an alkaline aqueous solution, starting from dry cathode comprises two half-cell, anodic (4) and cathodic (1), separated by an anionic exchange membrane whose surface in contact with the cathodic half-cell is a membrane-electrode assembly (MEA) (2), and the alkaline solution is present only in the anodic half-cell.    USE - As device for the electrolytic production of hydrogen from an alkaline aqueous solution, starting from dry cathode (claimed); use in hydrogenation reactions of food, metallurgical applications, chemical analysis techniques such as gas chromatography.    ADVANTAGE - The device is safe for the production, even on an industrial scale, of pressurized hydrogen, pure and dry, by electrolysis of aqueous solution, possibly directly supplied from renewable energy sources, intermittent. The amount of water is adequate for the formation of hydrogen at a rate that allows only the electrolysis reaction without the evaporation of water. Thus the hydrogen produced has high purity (without any electrolytes) and is dry. The device is efficient using alkaline solutions in which the electrolyte is present at concentrations less than 5 wt%. These concentrations are significantly lower than those generally used in devices currently on the market. The use of dilute solutions (preferably 0.5-2.0 wt%) is obviously an advantage in terms of economic savings of raw materials and greater safety in the handling of the solutions. The device works with electrolytes such as carbonates that, compared to hydroxides, has a better safety profile in handling. The hydrogen produced with this method is obtained pressurized at pressures up to 100 bar. The electrolyser has considerable technical advantages over the prior art, and has high efficiency since does not require additional mechanical devices such as compressors or dryers.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) electrolytic device comprising a stack of electrolytic cells; and    (2) production of pressurized hydrogen, dry, with high purity, involving use of an electrolytic device, fed exclusively to the anodic cell with an aqueous alkaline solution.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of device for electrolytic production of hydrogen.    Cathodic half-cell (1)    Membrane-electrode assembly (2)    Anodic half-cell (4)