To provide a hydrogen storage material in which the electron arrangement and spin state of a metal capable of an ionic bond with hydrogen atoms are changed, and the bonding strength between the metal and hydrogen atoms is controlled, thus the hydrogen releasing temperature thereof can be controlled.
The hydrogen storage material 1 regarding the embodiment 1 in this invention has a structure where two magnesium atoms 11 capable of an ionic bond with two hydrogen atoms 10 and a metal atom 12 are comprised, and the metal atom 12 is arranged between the two magnesium atoms 11. By arranging (inserting) the metal atom 12 between the magnesium atoms 11 in this way, the electron arrangement and spin state of the magnesium atoms 11 are changed, and owing to the change, the bonding strength between the magnesium atoms 11 and the hydrogen atoms 10 is weakened. Thus, activation energy required for separating the hydrogen atoms 10 from the magnesium atoms 11 is reduced, and the hydrogen releasing temperature thereof can be lowered.
COPYRIGHT: (C)2006,JPO&NCIPI
Hiroshi Nakanishi
Dino Wilson Agerico Tan
Muneyuki Tsuda
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Hideno Kono