2007
DOI: 10.1039/b702723k
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Synthesis and properties of magnesium tetrahydroborate, Mg(BH4)2

Abstract: Mg(BH 4) 2 is one of the few complex hydrides which have the potential to meet the requirements for hydrogen storage materials, because it contains 14.9 mass% H and has suitable thermodynamic properties. It has not been investigated for hydrogen storage applications yet. In this study, several ways to synthesize solvated and desolvated magnesium tetrahydroborate by wet-chemical and mechanochemical methods were tested and compared. A direct synthesis by a reaction of MgH 2 with aminoboranes yields magnesium tet… Show more

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Cited by 336 publications
(377 citation statements)
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“…Mg(BH 4 ) 2 releases approximately 14.9 mass% of hydrogen when heated up to 870 K [56][57][58][59][60][61][62][63][64][65][66]. The dehydrogenation process is found to also proceed through multiple steps together with the formation of intermediate compounds [62,63,65], as summarized in Figure 2.…”
Section: Fundamentals Of Hydrogen Storage Propertiesmentioning
confidence: 89%
“…Mg(BH 4 ) 2 releases approximately 14.9 mass% of hydrogen when heated up to 870 K [56][57][58][59][60][61][62][63][64][65][66]. The dehydrogenation process is found to also proceed through multiple steps together with the formation of intermediate compounds [62,63,65], as summarized in Figure 2.…”
Section: Fundamentals Of Hydrogen Storage Propertiesmentioning
confidence: 89%
“…1 Regarding the hydrogen gravimetric and volumetric system targets, recently revised by the U.S. Department of Energy to 5.5 wt % and 40 g/L, 2 most of the alkali and alkali-earth metal borohydrides match them. However, metal borohydrides are quite stable for hydrogen release by thermolysis as they decompose at high temperatures (about 470°C for LiBH 4 and 290−500°C for Mg(BH 4 ) 2 ). 3,4 The temperature of desorption can be dramatically reduced for bimetallic borohydride complexes, where the decomposition temperature decreases with increasing Pauling electronegativity for complex anions.…”
Section: ■ Introductionmentioning
confidence: 99%
“…However, metal borohydrides are quite stable for hydrogen release by thermolysis as they decompose at high temperatures (about 470°C for LiBH 4 and 290−500°C for Mg(BH 4 ) 2 ). 3,4 The temperature of desorption can be dramatically reduced for bimetallic borohydride complexes, where the decomposition temperature decreases with increasing Pauling electronegativity for complex anions. 5,6 The increasing covalence in M−H bonding weakens the B−H bonding and improves thermal decomposition properties of bimetallic complexes.…”
Section: ■ Introductionmentioning
confidence: 99%
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“…In conventional hydrogen storage experiments a single-composition powder is prepared by combining the precursors via chemical methods, alloying or ball milling. The hydrogen storage capabilities of the prepared material are then evaluated by volumetric/gravimetric pressure-composition isotherm (PCT) measurements in combination with ex situ or in situ structural studies, by, for example, x-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy [2,3]. Each powder can contain as many as five components, which need to be varied individually, along with the refinement of the grain size for each composition, to identify a suitable material.…”
Section: Introductionmentioning
confidence: 99%