Hydrolysis of Mg(BH4)2 and its coordination compounds as a way to obtain hydrogen

Solov’ev, M. V.; Chashchikhin, Oleg V.; Dorovatovskii, Pavel V.; Khrustalev, Victor N.; Zyubin, A. S.; Zyubina, T. S.; Кравченко, О. В.; Zaytsev, Alexey; Dobrovolsky, Yu. A.

doi:10.1016/j.jpowsour.2017.11.090

Cited by 30 publications

(18 citation statements)

References 43 publications

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“…According to previous research, pristine Mg(BH 4 ) 2 could release 3.87 wt % hydrogen in water at 25 °C, while the Mg(BH 4 ) 2 −0.5Et 2 O and Mg(BH 4 ) 2 −diglyme hybrids could release 2.76 and 4.36 wt %, respectively. 42 Among all the solid-state hydride systems listed, the MBHLAH-30FGi composite exhibits the lowest dehydrogenation temperature of 68.2 °C. Meanwhile, 7.12 wt % hydrogen can be released at this temperature, much more than those of the hydrolysis systems.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

LiAlH₄ as a “Microlighter” on the Fluorographite Surface Triggering the Dehydrogenation of Mg(BH₄)₂: Toward More than 7 wt % Hydrogen Release below 70 °C

Zheng

Cheng

Wang

et al. 2020

ACS Appl. Energy Mater.

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Mg(BH 4 ) 2 is one of the most promising hydrides for hydrogen storage. Herein, the dehydrogenation properties of Mg(BH 4 ) 2 are significantly improved by LiAlH 4 and fluorographite (FGi) addition. The metathesis reaction between Mg(BH 4 ) 2 and LiAlH 4 has been strongly hindered by FGi, and a novel "chocolate cookie" structure is observed that Mg(BH 4 ) 2 and LiAlH 4 particles scatter uniformly on the FGi surface. An unexpected hydrogen desorption capacity of 7.12 wt % is discovered in the Mg(BH 4 ) 2 − LiAlH 4 −30FGi composite at a temperature as low as 68.2 °C. More encouragingly, the rapid dehydrogenation process can be fully accomplished in seconds, indicating an ultrafast hydrogen desorption kinetic behavior. Further investigations find that the remarkably enhanced dehydrogenation behavior is attributed to the interaction between FGi and the two hydrides, which greatly reduces the enthalpy change of the dehydrogenation reaction. This investigation reveals that the LiAlH 4 can act as a "microlighter" to trigger the dehydrogenation of Mg(BH 4 ) 2 at low temperature.

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Section: ■ Results and Discussionmentioning

confidence: 99%

LiAlH₄ as a “Microlighter” on the Fluorographite Surface Triggering the Dehydrogenation of Mg(BH₄)₂: Toward More than 7 wt % Hydrogen Release below 70 °C

Zheng

Cheng

Wang

et al. 2020

ACS Appl. Energy Mater.

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“…[23][24][25] In the case of Mg(BH 4 ) 2 -diglyme 0.5 the vibrational frequency distribution is both anions are bound to Mg 2+ through double borohydride bridges Mg-H 2 -B. 14,15 The Gaussian model 27 can be used to fit the quasielastic region of S digl (Q, E). The model considers particles diffusing in a confinement with soft boundaries and has been successfully applied for the characterization of the flexibility of alkyl substituents in ionic liquids.…”

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confidence: 99%

Dynamics of the Coordination Complexes in a Solid-State Mg Electrolyte

Burankova

Roedern

Maniadaki

et al. 2018

J. Phys. Chem. Lett.

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Coordination complexes of magnesium borohydride show promising properties as solid electrolytes for magnesium ion batteries and warrant a thorough microscopic description of factors governing their mobility properties. Here, the dynamics of Mg(BH 4) 2diglyme 0.5 on the atomic level are investigated by means of quasielastic neutron scattering (QENS) supported by DFT calculations, IR and NMR spectroscopy. Employing deuterium labeling we can unambiguously separate all the hydrogen containing electrolyte components, which facilitate Mg 2+ transport, and provide a detailed analytical description of their motions on the picosecond time scale. The planar diglyme chain coordinating the central Mg atom appears to be flexible, while two dynamically different groups of [BH 4 ] − anions undergo reorientations. The latter has important implications for the thermal stability and conductivity of Mg(BH 4) 2-diglyme 0.5 and demonstrates that the presence of excess Mg(BH 4) 2 units in partially chelated Mg complexes may improve the overall performance of related solid-state electrolytes.

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“…In addition to the mentioned issue, another difficulty in hydrogen energy is that this element is not found in its pure form in natural conditions. In other words, hydrogen must be separated from compounds to be obtained [76,77].…”

Section: Discussionmentioning

confidence: 99%

Analysis of Strategic Directions in Sustainable Hydrogen Investment Decisions

Yüksel

et al. 2020

Sustainability

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This study seeks to find the appropriate strategies necessary to make sustainable and effective hydrogen energy investments. Within this scope, nine different criteria are defined regarding social, managerial, and financial factors. A hesitant, interval-valued, intuitionistic fuzzy (IVIF) decision-making trial and evaluation laboratory (DEMATEL) methodology is considered to calculate the degree of importance of the criteria. Additionally, impact relation maps are also generated to visualize the causality relationship between the factors. The findings indicate that the technical dimension has the greatest importance in comparison to managerial and financial factors. Furthermore, it is also concluded that storage and logistics, research and development, and technological infrastructure are the most significant factors to be considered when defining hydrogen energy investment strategies. Hence, before investing in hydrogen energy, necessary actions should be taken to minimize the storage and logistic costs. Among them, building the production site close to the usage area will contribute significantly to this purpose. In this way, possible losses during the transportation of hydrogen can be minimized. Moreover, it is essential to identify the lowest-cost hydrogen storage method by carrying out the necessary research and development activities, thereby increasing the sustainability and effectiveness of hydrogen energy investment projects.

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Hydrolysis of Mg(BH4)2 and its coordination compounds as a way to obtain hydrogen

Cited by 30 publications

References 43 publications

LiAlH₄ as a “Microlighter” on the Fluorographite Surface Triggering the Dehydrogenation of Mg(BH₄)₂: Toward More than 7 wt % Hydrogen Release below 70 °C

LiAlH₄ as a “Microlighter” on the Fluorographite Surface Triggering the Dehydrogenation of Mg(BH₄)₂: Toward More than 7 wt % Hydrogen Release below 70 °C

Dynamics of the Coordination Complexes in a Solid-State Mg Electrolyte

Analysis of Strategic Directions in Sustainable Hydrogen Investment Decisions

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Hydrolysis of Mg(BH4)2 and its coordination compounds as a way to obtain hydrogen

Cited by 30 publications

References 43 publications

LiAlH4 as a “Microlighter” on the Fluorographite Surface Triggering the Dehydrogenation of Mg(BH4)2: Toward More than 7 wt % Hydrogen Release below 70 °C

LiAlH4 as a “Microlighter” on the Fluorographite Surface Triggering the Dehydrogenation of Mg(BH4)2: Toward More than 7 wt % Hydrogen Release below 70 °C

Dynamics of the Coordination Complexes in a Solid-State Mg Electrolyte

Analysis of Strategic Directions in Sustainable Hydrogen Investment Decisions

Contact Info

Product

Resources

About

LiAlH₄ as a “Microlighter” on the Fluorographite Surface Triggering the Dehydrogenation of Mg(BH₄)₂: Toward More than 7 wt % Hydrogen Release below 70 °C

LiAlH₄ as a “Microlighter” on the Fluorographite Surface Triggering the Dehydrogenation of Mg(BH₄)₂: Toward More than 7 wt % Hydrogen Release below 70 °C