Dehydriding Property of NaBH&lt;sub&gt;4&lt;/sub&gt; Combined with Mg&lt;sub&gt;2&lt;/sub&gt;FeH&lt;sub&gt;6&lt;/sub&gt;

Li, Guanqiao; Matsuo, Motoaki; Deledda, Stefano; Hauback, Bjørn C.; Orimo, Shin Ichi

doi:10.2320/matertrans.mg201404

Cited by 10 publications

(4 citation statements)

References 25 publications

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“…The 2:1 mixture also showed multiple thermal transitions together with hydrogen release and it can be seen that as the content of Mg 2 FeH 6 increased, the number of thermal transitions for desorption decreased. This behavior is in agreement with Li et al 13,14 where similar mixtures of Mg 2 FeH 6 þ LiBH 4 and Mg 2 FeH 6 þ NaBH 4 were decomposed under the same conditions and this resulted in the desorption temperatures occurring between that of the individual hydrides. It is important to note that TG data (Figure 1(b)), associated with the thermal events of the Mg(BH 4 ) 2 mixtures in this letter, indicated that each of the ball milled molar ratio combinations was able to desorb close to the aforementioned theoretical capacities, confirming that complete desorption of both the Mg(BH 4 ) 2 and Mg 2 FeH 6 had taken place.…”

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confidence: 91%

Simultaneous desorption behavior of M borohydrides and Mg2FeH6 reactive hydride composites (M = Mg, then Li, Na, K, Ca)

Chaudhary

Matsuo

et al. 2015

Applied Physics Letters

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Original Chaudhary, A.-L.; Li, G.; Matsuo, M.; Orimo, S.; Deledda, S., Soerby, M.H.; Hauback, B.C.; Pistidda, C.; Klassen, T.; Dornheim, M.: Simultaneous desorption behavior of M borohydrides and Mg2FeH6 reactive hydride composites (M = Mg, then Li, Na, K, Ca)In: Applied Physics Letters (2015) AIP Combinations of complex metal borohydrides ball milled with the transition metal complex hydride, Mg 2 FeH 6 , are analysed and compared. Initially, the Reactive Hydride Composite (RHC) of Mg 2þ cation mixtures of Mg 2 FeH 6 and c-Mg(BH 4 ) 2 is combined in a range of molar ratios and heated to a maximum of 450 C. For the molar ratio of 6 Mg 2 FeH 6 þ Mg(BH 4 ) 2 , simultaneous desorption of the two hydrides occurred, which resulted in a single event of hydrogen release. This single step desorption occurred at temperatures between those of Mg 2 FeH 6 and c-Mg(BH 4 ) 2 . Keeping this anionic ratio constant, the desorption behavior of four other borohydrides, Li-, Na-, K-, and Ca-borohydrides was studied by using materials ball milled with Mg 2 FeH 6 applying the same milling parameters. The mixtures containing Mg-, Li-, and Ca-borohydrides also released hydrogen in a single event. The Mass Spectrometry (MS) results show a double step reaction within a narrow temperature range for both the Na-and K-borohydride mixtures. This phenomenon, observed for the RHC systems at the same anionic ratio with all five light metal borohydride mixtures, can be described as simultaneous hydrogen desorption within a narrow temperature range centered around 300 C. V C 2015 AIP Publishing LLC. [http://dx.

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confidence: 91%

Simultaneous desorption behavior of M borohydrides and Mg2FeH6 reactive hydride composites (M = Mg, then Li, Na, K, Ca)

Chaudhary

Matsuo

et al. 2015

Applied Physics Letters

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“…500 °C for NaBH4 to 360 °C for the NaBH4/Mg2NiH4 composite mixture. When Mg2FeH6 is added to NaBH4 the dehydrogenation can become quite complex [46]. A single dehydriding step is observed for xNaBH4 + (1 − x)Mg2FeH6 when x = 0.1 and 0.125, but a multi-step process occurs when x > 0.25.…”

Section: Hydride Destabilizationmentioning

confidence: 97%

Recent Advances in the Use of Sodium Borohydride as a Solid State Hydrogen Store

2015

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Abstract:The development of new practical hydrogen storage materials with high volumetric and gravimetric hydrogen densities is necessary to implement fuel cell technology for both mobile and stationary applications. NaBH4, owing to its low cost and high hydrogen density (10.6 wt%), has received extensive attention as a promising hydrogen storage medium. However, its practical use is hampered by its high thermodynamic stability and slow hydrogen exchange kinetics. Recent developments have been made in promoting H2 release and tuning the thermodynamics of the thermal decomposition of solid NaBH4. These conceptual advances offer a positive outlook for using NaBH4-based materials as viable hydrogen storage carriers for mobile applications. This review summarizes contemporary progress in this field with a focus on the fundamental dehydrogenation and rehydrogenation pathways and properties and on material design strategies towards improved kinetics and thermodynamics such as catalytic doping, nano-engineering, additive destabilization and chemical modification.

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“…Furthermore, the formation of stable side products such as Na 2 B 12 H 12 has been also suggested [180]. Under vacuum, the pathway is different and it involves the formation of free Mg and finally free B [181].…”

Section: Nabhmentioning

confidence: 99%

Tetrahydroborates: Development and Potential as Hydrogen Storage Medium

et al. 2017

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Abstract:The use of fossil fuels as an energy supply becomes increasingly problematic from the point of view of both environmental emissions and energy sustainability. As an alternative, hydrogen is widely regarded as a key element for a potential energy solution. However, differently from fossil fuels such as oil, gas, and coal, the production of hydrogen requires energy. Alternative and intermittent renewable energy sources such as solar power, wind power, etc., present multiple advantages for the production of hydrogen. On the one hand, the renewable sources contribute to a remarkable reduction of pollutants released to the air and on the other hand, they significantly enhance the sustainability of energy supply. In addition, the storage of energy in form of hydrogen has a huge potential to balance an effective and synergetic utilization of renewable energy sources. In this regard, hydrogen storage technology is a key technology towards the practical application of hydrogen as "energy carrier". Among the methods available to store hydrogen, solid-state storage is the most attractive alternative from both the safety and the volumetric energy density points of view. Because of their appealing hydrogen content, complex hydrides and complex hydride-based systems have attracted considerable attention as potential energy vectors for mobile and stationary applications. In this review, the progresses made over the last century on the synthesis and development of tetrahydroborates and tetrahydroborate-based systems for hydrogen storage purposes are summarized.

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Dehydriding Property of NaBH<sub>4</sub> Combined with Mg<sub>2</sub>FeH<sub>6</sub>

Cited by 10 publications

References 25 publications

Simultaneous desorption behavior of M borohydrides and Mg2FeH6 reactive hydride composites (M = Mg, then Li, Na, K, Ca)

Simultaneous desorption behavior of M borohydrides and Mg2FeH6 reactive hydride composites (M = Mg, then Li, Na, K, Ca)

Recent Advances in the Use of Sodium Borohydride as a Solid State Hydrogen Store

Tetrahydroborates: Development and Potential as Hydrogen Storage Medium

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