%0 journal article
%@ 2075-4701
%A Le, T.,Pistidda, C.,Puszkiel, J.,Milanese, C.,Garroni, S.,Emmler, T.,Capurso, G.,Gizer, G.,Klassen, T.,Dornheim, M.
%D 2019
%J Metals
%N 10
%P 1061 
%R doi:10.3390/met9101061
%T Efficient Synthesis of Alkali Borohydrides from Mechanochemical Reduction of Borates Using Magnesium–Aluminum-Based Waste
%U https://doi.org/10.3390/met9101061
10 
%X Lithium borohydride (LiBH4) and sodium borohydride (NaBH4) were synthesized via mechanical milling of LiBO2, and NaBO2 with Mg–Al-based waste under controlled gaseous atmosphere conditions. Following this approach, the results herein presented indicate that LiBH4 and NaBH4 can be formed with a high conversion yield starting from the anhydrous borates under 70 bar H2. Interestingly, NaBH4 can also be obtained with a high conversion yield by milling NaBO2·4H2O and Mg–Al-based waste under an argon atmosphere. Under optimized molar ratios of the starting materials and milling parameters, NaBH4 and LiBH4 were obtained with conversion ratios higher than 99.5%. Based on the collected experimental results, the influence of the milling energy and the correlation with the final yields were also discussed.