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Abstract:
A composite of 2 LiBH4 + nano-MgH2* (Ti-catalyzed) shows significantly enhanced desorption kinetics compared to a conventional mixture of 2 LiBH4 + MgH2. The desorption mechanism was studied in the temperature range between 304 and 383 °C and under different pressure conditions. Desorption temperatures are 50–70 °C lower compared to conventional 2 LiBH4 + MgH2 mixtures. During the hydrogen release from a mixture of 2 LiBH4 + MgH2* at a hydrogen back-pressure of 0.4 MPa, MgB2 is formed and three different plateaus of equilibrium were detected. The reaction pathway is changed at 360 °C for the 2 LiBH4 + MgH2 system when the nano-MgH2* is used.