Reversible dehydrogenation of magnesium borohydride to magnesium triborane in the solid state under moderate conditions

Chong, Marina; Karkamkar, Abhijeet J.; Autrey, Tom; Orimo, Shin Ichi; Jalisatgi, Satish S.; Jensen, Craig M.

doi:10.1039/c0cc03461d

Cited by 152 publications

(227 citation statements)

References 29 publications

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“…Only a few of the thousands of materials investigated have garnered as much interest as Mg(BH 4 ) 2 [1][2][3][4][5][6][7][8][9][10][11][12]. The high gravimetric density of H 2 , ca.…”

Section: Introductionmentioning

confidence: 99%

Lewis Base Complexes of Magnesium Borohydride: Enhanced Kinetics and Product Selectivity upon Hydrogen Release

2017

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“…Only a few of the thousands of materials investigated have garnered as much interest as Mg(BH 4 ) 2 [1][2][3][4][5][6][7][8][9][10][11][12]. The high gravimetric density of H 2 , ca.…”

Section: Introductionmentioning

confidence: 99%

Lewis Base Complexes of Magnesium Borohydride: Enhanced Kinetics and Product Selectivity upon Hydrogen Release

2017

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“…[1][2][3][4][5] Metal octahydrotriborates (M(B 3 H 8 ) n ), sometimes known as metal triboranes, have therefore aroused attention. [6][7][8] 2 , has shown a cycling capacity of 2.5 wt %. [8] They have been observed during the thermal decomposition of borohydrides.…”

Section: Introductionmentioning

confidence: 99%

“…[6][7][8] 2 , has shown a cycling capacity of 2.5 wt %. [8] They have been observed during the thermal decomposition of borohydrides. [9,10] Metal dodecaborates (M(B 12 H 12 ) m ) have also been observed as intermediates among others during the thermal decomposition of borohydrides.…”

Section: Introductionmentioning

confidence: 99%

“…[9,10] Metal dodecaborates (M(B 12 H 12 ) m ) have also been observed as intermediates among others during the thermal decomposition of borohydrides. [8,11] Their high thermal stability makes complete dehydrogenation of borohydrides difficult, so it may be desirable to change the reaction pathway to avoid their formation. The availability of metal octahydrotriborates and metal dodecaborates is important for in-depth investigations of the borohydrides' hydrogen storage mechanism.…”

Section: Introductionmentioning

confidence: 99%

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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

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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.

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“…[B 3 H 8 ] − was generated and then may react with MgH 2 and Na + to form another part of NaBH 4 [82]. In the reaction between Mg 2 Si and NaBO 2 ·2H 2 O, Si-H was found (Figure 2d In conclusion, two forms of hydrogen molecules exist in the regeneration.…”

Section: Mechanism Of Nabh 4 Regeneration Using Nabo 2 ·Xh 2 O As Rawmentioning

confidence: 83%

A Recycling Hydrogen Supply System of NaBH4 Based on a Facile Regeneration Process: A Review

Ouyang

Zhong

et al. 2018

Inorganics

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NaBH 4 hydrolysis can generate pure hydrogen on demand at room temperature, but suffers from the difficult regeneration for practical application. In this work, we overview the state-of-the-art progress on the regeneration of NaBH 4 from anhydrous or hydrated NaBO 2 that is a byproduct of NaBH 4 hydrolysis. The anhydrous NaBO 2 can be regenerated effectively by MgH 2 , whereas the production of MgH 2 from Mg requires high temperature to overcome the sluggish hydrogenation kinetics. Compared to that of anhydrous NaBO 2 , using the direct hydrolysis byproduct of hydrated NaBO 2 as the starting material for regeneration exhibits significant advantages, i.e., omission of the high-temperature drying process to produce anhydrous NaBO 2 and the water included can react with chemicals like Mg or Mg 2 Si to provide hydrogen. It is worth emphasizing that NaBH 4 could be regenerated by an energy efficient method and a large-scale regeneration system may become possible in the near future.

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Reversible dehydrogenation of magnesium borohydride to magnesium triborane in the solid state under moderate conditions

Cited by 152 publications

References 29 publications

Lewis Base Complexes of Magnesium Borohydride: Enhanced Kinetics and Product Selectivity upon Hydrogen Release

Lewis Base Complexes of Magnesium Borohydride: Enhanced Kinetics and Product Selectivity upon Hydrogen Release

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

A Recycling Hydrogen Supply System of NaBH4 Based on a Facile Regeneration Process: A Review

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