Aluminum borohydride–ethylenediamine as a hydrogen storage candidate

Abstract

A series of novel hydrogen storage compounds (Al(BH 4 ) 3 $nC 2 H 8 N 2 , n ¼ 4, 3, 2, 1) were synthesized. This system turned out to be a reliable hydrogen storage candidate and a maximum of 10.4 wt% pure hydrogen was achieved below 350 C. Further investigation revealed that the coordination number has a significant impact on their dehydrogenation properties, enabling tunable dehydrogenation of the system.

Aluminum Borohydride Complex with Ethylenediamine: Crystal Structure and Dehydrogenation Mechanism Studies

“…26,27 Recently, the ethylenediamine (EDA) containing complexes were explored because of their high hydrogen capacity. 28,29 The EDA molecule is the simplest diamine and one of the fundamental chelating agents for coordination compounds. It is rich in protic hydrogen atoms.…”

“…However, the structure of Al(BH 4 ) 3 •nEDA complexes remained unresolved in the previous study. 29 Therefore, to understand the mechanism of the decomposition behavior of aluminum borohydride ethylenediamines requires detailed studies of the relationship of the crystal and electronic structures of the material in order to allow targeted design of these materials to further improve the dehydrogenation performance.…”

Aluminium complexes of B- and N-based hydrides: Synthesis, structures and hydrogen storage properties

“…The complexes of Al(BH 4 ) 3 with ethylenediamine have also been reported recently [51]. Various compositions of Al(BH 4 ) 3 $nC 2 H 8 N 2 were proposed according to the addition reactions:…”

“…The series of Al(BH 4 ) 3 $nC 2 H 8 N 2 (1 n 4) have also been characterized in terms of hydrogen storage properties [51], the details of which are shown in Table 3. Two-step dehydrogenation is typical for these complexes, where H 2 is the predominant product according to the MS experiments.…”

Ignition and Combustion Behaviors of High Energetic Polyhedral Boron Cluster

“…Calculations demonstrate that LiAlH 4 and Mg(AlH 4 ) 2 are more helpful to increase the standard theoretical specific impulse of HTPB and energy level of p (BAMO-AMMO) composite propellant than Al particles [30]. However, the application of these materials is hindered by their unfavorable dehydrogenation temperatures, poor stability or compatibility [17][18][19][20].…”