NOVELTY - A hydrogen is produced by cycling a process of hydrolysis of reactive metal comprising reducing hydrogen that is extracted from the tank, and oxidizing the reactive metal to produce the hydroxide of the reactive metal; and a process of electrolytic reduction of the reactive metal comprising passing electric current through the hydroxide of the reactive metal.    USE - For producing hydrogen used in producing fuel for internal combustion engines, gas-turbine engines, gas turbines, or fuel cell stacks.    ADVANTAGE - The inventive method achieves increasing greatly electrolytic process efficiency, provides quick reduction of reactive metal, and diminishes operating costs. It utilizes a device that is mobile, reliable, and safe to operate.    DETAILED DESCRIPTION - Production of hydrogen by cycling the process of hydrolysis of a reactive metal and the process of electrolytic reduction of the reactive metal. The process of the hydrolysis of the reactive metal comprises supplying water to a tank (1) containing cathode (8) and anode (7), reducing hydrogen that is extracted from the tank, and oxidizing the reactive metal to produce the hydroxide of the reactive metal. The process of the electrolytic reduction of the reactive metal comprises passing electric current through the hydroxide of the reactive metal using the anode and the cathode to produce a reduced reactive metal, water, and oxygen. During the hydrolytic process, the tank contains the reactive metal in the form of a reaction melt containing the reactive metal and an additive of at least one low-melting-point alkali-resistant unreactive metal. During the hydrolytic process, the reactive metal oxidizes and converts to the hydroxide of the reactive metal and the residual reaction melt in the form of the melt of the additive deposits in the lower section of the tank and is used as a cathode in the process of the electrolytic reduction of the reactive metal, during which a reduced reactive metal passes to the reaction melt while water vapors and water produced are extracted from the tank. An INDEPENDENT CLAIM is also included for a device for producing hydrogen comprising a tank that contains a reactive metal and has a cathode and anode. The tank is hermetically sealed and comprises water supply, hydrogen extractor (12), and oxygen and water vapor extractor (13), with diaphragm(s) being provided between the cathode and the anode. The anode is made of an alkali-resistant tough metal and the cathode, in the process, being a metal melt of a variable composition containing a non-consumable component and consumable component. The non-consumable component contains low-melting-point alkali-resistant unreactive metal(s) such as lead, tin, bismuth, or cadmium, and the consumable component is a reactive metal.    DESCRIPTION OF DRAWING(S) - The drawing shows the device used in the invention.    Tank (1)    Anode (7)    Cathode (8)    Electrical heater (10)    Hydrogen extractor (12)    Oxygen and water vapor extractor (13)    Water vapor condenser (14)    Switch (17)