HYDROGEN STORAGE MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide an inexpensive hydrogen storage material which does not lose the hydrogen occlusion capability on exposure to the air, and occludes hydrogen under a low hydrogen pressure. SOLUTION: Part of the surface of a metal or an alloy which has a hydride phase whose heat of formation is negatively larger than -45kJ/mol.H2, is covered with palladium, thereby forming the hydrogen storage material. Even the exposure to the air causes a less degradation of hydrogen occlusion capability because the material is covered with palladium. The material can occlude hydrogen under a hydrogen pressure lower than the equilibrium hydrogen pressure of palladium. COPYRIGHT: (C)2005,JPO&NCIPI