Synthesis of LiBH4 from LiBO2 as hydrogen carrier and its catalytic dehydrogenation

• Synthesis of lithium borohydride starting from LiBO2 instead of its elements was investigated firstly.
• Hydrogen evolution in catalytic method was carried out by CoI2 catalyst.
• Activation energy of the catalyst was determined as 33.12 kJ/mol.
• This novel method is economic, feasible and technologically applicable.

This study deals to synthesize LiBH4 by means of mechano-chemical reaction, in which LiBO2 and MgH2 were utilized. In order to obtain 90% LiBH4 purity, optimum reaction conditions were analyzed at different values of reactant ratio and duration. In addition, commercial LiBH4 was hydrolyzed with CoI2 supported on activated carbon (AC). In order to follow up the intermediate steps of the studies FT-IR, XRD analyses have been used. Activation energy of the dehyrdogeneration reaction was searched at different reaction temperatures and determined as 33.12 kJ/mol. As an optimum operation time for ball-milling were recorded as 1000 min and reactant ratio (MgH2/LiBO2) were found as 1.0.

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