The Chemistry of the Alkali Amides.

Bergstrom, F. W.; Fernelius, W.C.

doi:10.1021/cr60041a002

Cited by 86 publications

(56 citation statements)

References 44 publications

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“…Furthermore, they have experimentally demonstrated that the hydrogen desorption reaction (2) proceeds by the following two Here, it is to be noted that the existence of the above two reactions has already been described in the previous reports [8,9]. The above reaction (4) suggests that it is possible to synthesize LiNH 2 by ball-milling LiH under a gaseous NH 3 atmosphere at room temperature [5].…”

Section: Introductionmentioning

confidence: 73%

Hydrogen desorption/absorption properties of Li–Ca–N–H system

Tokoyoda¹,

Hino

Ichikawa

et al. 2007

Journal of Alloys and Compounds

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Hydrogen storage properties of two ball-milled composites of Ca(NH 2 ) 2 + 2LiH and CaH 2 + 2LiNH 2 were investigated as a series of searching studies of high performance hydrogen storage materials. About 4.5 mass% hydrogen is desorbed from about 100 • C and the thermal desorption profiles show a peak around 200 and 220 • C for the composites of CaH 2 + 2LiNH 2 and Ca(NH 2 ) 2 + 2LiH, respectively, under a helium flow at 5 • C/min heating rate without any NH 3 emission within our experimental accuracy. The powder X-ray diffraction and infrared absorption spectroscopy indicated that the dehydrogenated states of both composites form "an unknown imide phase" after heating up to 400 • C, while the dehydrogenated states after heating up to 200 • C in vacuum are the mixed phases of Li 2 NH and CaNH. The rehydrogenated state for the ball-milled composite of CaH 2 + 2LiNH 2 is transformed into the composite of Ca(NH 2 ) 2 and 2LiH by repeating the dehydrogenation and rehydrogenation cycles at 180-200 • C.

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Section: Introductionmentioning

confidence: 73%

Hydrogen desorption/absorption properties of Li–Ca–N–H system

Tokoyoda¹,

Hino

Ichikawa

et al. 2007

Journal of Alloys and Compounds

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“…The synthesis of few metal amides and their basic reactions related with hydrogen were reported by Bergstrom and Fernelius in 1993 [196]. Recently, it has been demonstrated that amide/imide system reversibly stores hydrogen under moderate reaction temperatures.…”

Section: Referencementioning

confidence: 94%

High capacity hydrogen storage: Basic aspects, new developments and milestones

2012

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“…The chemistry of the alkali and alkaline earth metal amides has been the subject of a large number of investigations [4,5]. Thermal decomposition properties of metal amides under inert gas flow (or in vacuum) have been investigated.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic properties of metal amides determined by ammonia pressure-composition isotherms

Hino

Ichikawa

Kojima

2010

The Journal of Chemical Thermodynamics

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a b s t r a c tThermodynamic properties of Mg(NH 2 ) 2 and LiNH 2 were investigated by measurements of NH 3 pressurecomposition isotherms (PCI). Van't Hoff plot of plateau pressures of PCI for decomposition of Mg(NH 2 ) 2 indicated the standard enthalpy and entropy change of the reactions were DH°= (120 ± 11) kJ Á mol À1 (per unit amount of NH 3 ) and DS°= (182 ± 19) J Á mol À1 Á K À1 for the reaction: Mg(NH 2 ) 2 ? MgNH + NH 3 , and DH°= 112 kJ Á mol À1 and DS o = 157 J Á mol À1 Á K À1 for the reaction: MgNH ? (1/3)Mg 3 N 2 + (1/3)NH 3 . PCI measurements for formation of LiNH 2 were carried out, and temperature dependence of plateau pressures indicated DH°= (À108 ± 15) kJ Á mol À1 and DS°= (À143 ± 25) J Á mol À1 Á K À1 for the reaction: Li 2 NH + NH 3 ? 2LiNH 2 .

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The Chemistry of the Alkali Amides.

Cited by 86 publications

References 44 publications

Hydrogen desorption/absorption properties of Li–Ca–N–H system

Hydrogen desorption/absorption properties of Li–Ca–N–H system

High capacity hydrogen storage: Basic aspects, new developments and milestones

Thermodynamic properties of metal amides determined by ammonia pressure-composition isotherms

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