Role of Li2B12H12 for the Formation and Decomposition of LiBH4

Friedrichs, O.; Remhof, Arndt; Hwang, Son‐Jong; Züttel, Andreas

doi:10.1021/cm100536a

Cited by 152 publications

(150 citation statements)

References 30 publications

Supporting

Mentioning

142

Contrasting

Order By: Relevance

“…4) . [39,47] We also found that the back pressure of the reacting system affects the yield of Na 2 B 12 H 12 . In a closed system, the yield of Na 2 B 12 H 12 is improved (~10 %, based upon NaB 3 H 8 ), which indicates a more efficient reaction between the volatile boranes and the solid products forming Na 2 B 12 H 12 .…”

Section: Synthesis Of Na 2 B 12 H 12mentioning

confidence: 71%

An improved synthesis of unsolvated NaB 3 H 8 and its application in preparing Na 2 B 12 H 12

Chen

et al. 2016

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

Octahydrotriborates are potential hydrogen storage materials and chemical vapor deposition precursors to boride films. Their syntheses have been quite challenging, however. In this paper, an improved facile route for the preparation of unsolvated sodium octahydrotriborate (NaB3H8), which is an important precursor to other octahydrotriborates and derivatives, is reported. The key steps in the synthesis involve dispersing Na finely in inert media and preparing fresh tetrahydrofuran (THF)·BH3 at room temperature. High purity unsolvated NaB3H8 can be obtained in tens of grams or more in one batch, depending on the reactor size. Using NaB3H8 as the precursor, sodium dodecaborate (Na2B12H12) has been successfully synthesized. Both octahydrotriborates and dodecaborates have been observed as intermediates during the thermal dehydrogenation of borohydrides, and their facile syntheses would facilitate mechanistic studies on the hydrogen storage of borohydrides, among other potential applications. Disciplines Engineering | Physical Sciences and Mathematics Publication DetailsChen, W., Wu, G., He, T., Li, Z., Guo, Z., Liu, H., Huang, Z. & Chen, P. (2016). An improved synthesis of unsolvated NaB3H8 and its application in preparing Na2B12H12. AbstractOctahydrotriborates are potential hydrogen storage materials and chemical vapor deposition precursors to boride films. Their syntheses have been quite challenging, however. In this paper, an improved facile route for the preparation of unsolvated sodium octahydrotriborate (NaB 3 H 8 ), which is an important precursor to other octahydrotriborates and derivatives, is reported. The key steps in the synthesis involve dispersing Na finely in inert media and preparing fresh tetrahydrofuran (THF)·BH 3 at room temperature. High purity unsolvated NaB 3 H 8 can be obtained in tens of grams or more in one batch, depending on the reactor size. Using NaB 3 H 8 as the precursor, sodium dodecaborate (Na 2 B 12 H 12 ) has been successfully synthesized. Both octahydrotriborates and dodecaborates have been observed as intermediates during the thermal dehydrogenation of borohydrides, and their facile syntheses would facilitate mechanistic studies on the hydrogen storage of borohydrides, among other potential applications.

show abstract

Section: Synthesis Of Na 2 B 12 H 12mentioning

confidence: 71%

An improved synthesis of unsolvated NaB 3 H 8 and its application in preparing Na 2 B 12 H 12

Chen

et al. 2016

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

show abstract

“…This experimental line broadening was compared with second moment calculations. The expected dipolar broadening of 11 B with its surrounding nuclei, 11 B, 10 B, 1 H, 6 Li, and 7 Li, in the case of a rigid lattice is expected to be 47.2 kHz. This is much broader than the experimental line Li single pulse excitation spectra of 30 wt % LiBH 4 in ordered porous silica (MCM-41) for different temperatures with and without 1 H decoupling.…”

Section: ■ Experimental Sectionmentioning

confidence: 98%

Nanoconfined LiBH₄ and Enhanced Mobility of Li⁺and BH₄^– Studied by Solid-State NMR

Verkuijlen¹,

Ngene

Kort³

et al. 2012

J. Phys. Chem. C

View full text Add to dashboard Cite

show abstract

“…The formation mechanism of Na2B12H12 is not yet clear; the borohydride may originate from the reaction of boranes with unreacted NaBH4, which was proposed by the first principles calculations [25]. In fact, a similar decomposition route was proposed for LiBH4, where Friedrichs et al [30] suggested that the formation of Li2B12H12 arises from the reaction of the borane evolving from LiBH4 with the remaining starting material. First principles calculations suggest that Na2B12H12 has significant ionic character and is relatively stable and if it was formed during the thermal decomposition of NaBH4, thermodynamically one would not expect its existence to be fleeting [31].…”

Section: Thermal Decompositionmentioning

confidence: 99%

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

2015

View full text Add to dashboard Cite

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.

show abstract

Role of Li₂B₁₂H₁₂ for the Formation and Decomposition of LiBH₄

Cited by 152 publications

References 30 publications

An improved synthesis of unsolvated NaB 3 H 8 and its application in preparing Na 2 B 12 H 12

An improved synthesis of unsolvated NaB 3 H 8 and its application in preparing Na 2 B 12 H 12

Nanoconfined LiBH₄ and Enhanced Mobility of Li⁺and BH₄^– Studied by Solid-State NMR

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

Contact Info

Product

Resources

About

Role of Li2B12H12 for the Formation and Decomposition of LiBH4

Cited by 152 publications

References 30 publications

An improved synthesis of unsolvated NaB 3 H 8 and its application in preparing Na 2 B 12 H 12

An improved synthesis of unsolvated NaB 3 H 8 and its application in preparing Na 2 B 12 H 12

Nanoconfined LiBH4 and Enhanced Mobility of Li+ and BH4– Studied by Solid-State NMR

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

Contact Info

Product

Resources

About

Role of Li₂B₁₂H₁₂ for the Formation and Decomposition of LiBH₄

Nanoconfined LiBH₄ and Enhanced Mobility of Li⁺and BH₄^– Studied by Solid-State NMR