Effects of catalysts doping on the thermal decomposition behavior of Zn(BH4)2

Low‐Temperature Synthesis of LiBH4 by Gas–Solid Reaction

“…[21] The desorption products can be directly observed by mass spectrometry (Figure 1). The desorption starts at a temperature around 85 8C, which is in good agreement with the desorption temperature reported for ZnA C H T U N G T R E N N U N G (BH 4 ) 2 .…”

“…Higher boranes are known to form at these temperatures. [21] The temperature of 120 8C necessary for the absorption shows that there is a kinetic barrier that has to be overcome for the formation of LiBH 4 . Schlesinger et al proposed that a passivation layer of LiBH 4 that forms on the surface of LiH is responsible for the hindered LiBH 4 formation.…”

Hydrogen release from sodium borohydrides at low temperature by the addition of zinc fluoride

“…The cation exchange reaction (2NaBH 4 þ ZnF 2 / Zn(BH 4 ) 2 þ 2NaF) was not found in the solid-state mechanochemical process. It differs from that in NaBH 4 and ZnCl 2 mixtures, where Zn(BH 4 ) 2 was obtained after 20 min milling [19]. The reason is attributed to the difference of the bonding strength of F À and Cl À anions to Zn cation.…”

“…1b), a new phase of i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y 3 6 ( 2 0 1 1 ) 8 2 0 3 e8 2 0 8 NaZnF 3 was clearly observed in addition to NaBH 4 , NaBF 4 , ZnF 2 and Zn phases. Since the decomposition temperatures for Zn(BH 4 ) 2 and ZnH 2 are 85 C and 90 C [22,19], respectively, the reaction to produce NaZnF 3 could be determined as follows:…”

Improvement in dehydrogenation performance of Mg(BH4)2·2NH3 doped with transition metal: First-principles investigation

“…Table 3 show that the values of r and ▽ 2 r for all NeH bonds are approximately 0. 33 i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y 4 0 ( 2 0 1 5 ) 8 7 2 1 e8 7 3 1 close to zero. This demonstrates that the BeH bond is partly covalent and weaker than the NeH bond.…”