| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1271456 | International Journal of Hydrogen Energy | 2015 | 6 Pages |
•The hydrogenated Mg11CeNi alloy can be used as an effective destabilizer for LiBH4.•Dehydrogenation of the LiBH4/Mg11CeNi hydride system proceeds mainly in two steps.•Mg, Mg2Ni and CeH2 are working together to destabilize LiBH4.•LiBH4, MgH2, Mg2NiH4 and CeH2 can be regenerated upon rehydrogenation.
The hydrogenated Mg11CeNi alloy was utilized as a destabilizer to combine with LiBH4 in this paper. It was found that thermal dehydrogenation of the LiBH4/Mg11CeNi hydride system with a molar ratio of 17:2.5 proceeds in two-step reactions: one initiates at around 280 °C with about 4.0 wt.% of hydrogen released from MgH2 and Mg2NiH4, and the other occurs in the temperature range 350–425 °C that can be assigned to the decomposition of LiBH4 co-destabilized by Mg2Ni, CeH2 and Mg. These two-step dehydrogenation reactions for the LiBH4/Mg11CeNi hydride system are partially reversible, and about 4.9 wt.% of hydrogen can be reloaded at 400 °C under an initial hydrogen pressure of 9 MPa.
