Metal Tetrahydroborates

Hydrogen Sorption in Erbium Borohydride Composite Mixtures with LiBH4 and/or LiH

“…LiBH 4 has proven to be an efficient precursor, but also other metal borohydrides e.g., NaBH 4 , have been successfully used [30][31][32]. As an alternative method, the solvent-based synthesis of borohydrides has been used for over 50 years with the advantage of removing the alkali metal chloride (i.e., LiCl) [28], which is necessary to increase the hydrogen capacity. The halide-free synthesis in this paper is based on a mechanochemical synthesis [33] and wet-chemical extraction, as described by Hagemann et al [34,35].…”

“…The established technique to synthesize RE borohydrides is the solid state metathesis approach, as it has the advantage of direct synthesis of a RE borohydride without complicated in vacuo manipulations or possible decomposition [28,29]. The RE chloride and an alkali metal borohydride (i.e., Li, Na, K) are mixed in a one-step mechanochemical synthesis to form the RE borohydride and the alkali metal chloride via a metathesis reaction.…”

The hydrogen cycle with the hydrolysis of sodium borohydride: A statistical approach for highlighting the scientific/technical issues to prioritize in the field

“…4.2 M) is much lower than that of NaBH 4 (i.e. 14.6 M) at the same temperature [276]. On the opposite side, ratios higher than 20 (concentration lower than ca.…”

By‐Product Carrying Humidified Hydrogen: An Underestimated Issue in the Hydrolysis of Sodium Borohydride

“…This is explained by the low solubility of the borates (28 g NaBO 2 /100 g H 2 O ), which is actually lower than that of sodium borohydride (55 g NaBO 2 / 100 g H 2 O ). [5,8,15] For the series of hydrolysis experimentsw here the temperature varies from 30 to 60 8C, the boron concentrations determined by ICP-MS suggestt he presence of approxi-mately1 .15-3.14 wt %o fb oron in the droplets (Figure 4). Once more, it is important to notice that these values are qualitative as they do not take into account the droplets that were difficult to recover because condensing onto the walls close to the reaction medium, onto the walls of the hose connecting the reactor to the ultrapure water bath,o ro nto the walls of the tap (see the Supporting Information).…”