STORAGE METHOD FOR HYDROGEN OR ITS ISOTOPE WITH PD-RH ALLOY

PURPOSE:To improve the heavy hydrogen storage factor and reproducibility by using a specific alloy for a hydrogen storage metal in the electrolytic method. CONSTITUTION:An electrolyte 1M LiOD 3 is stored in a sealed pressure vessel 1, and pressurized (10 atm to ordinary pressure) heavy hydrogen gas is filled in its upper space. The whole negative electrode 4 is dipped in the electrolyte 3, and positive electrodes (platinum) 7 each made of a gas diffusion electrode and fixed with a porous film 5 via carbon paper 6 are half-dipped. When electrolysis is started, heavy hydrogen gas is fed to reaction layers via diffusion layers on positive electrodes 7 and ionized in contact with the electrolyte 3. D ions become adsorbed atoms on the surface of the negative electrode 4 and are stored in the negative electrode 4. D atoms not stored are combined into heavy hydrogen molecules, and they are returned to the gas phase in the upper space. When an electrode made of a Pd90 RH10 alloy is used for the negative electrode 4, the maximum storage factor D/M=1 is obtained, where M indicates an alloy. When hydrogen is stored in place of the storage of heavy hydrogen, a similar effect is expected.