High-capacity hydrogen release through hydrolysis of NaB3H8

Huang, Zhenguo; Chen, Xuenian; Yisgedu, Teshome B.; Zhao, Ji‐Cheng; Shore, Sheldon G.

doi:10.1016/j.ijhydene.2011.03.033

Cited by 32 publications

(29 citation statements)

References 25 publications

(22 reference statements)

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“…Work on the development of more stable borohydrides followed; for example, Xu [237] investigated the properties of aqueous ammonia borane and found this to be significantly more stable than NaBH 4 . Another material with greater stability is NaB 3 H 8 , synthesized and investigated by Shore [238]. Schubert [239] noted that the NaB 3 H 8 provided the added advantage of greater solubility of both the starting material and the products, in part due to the formation of a mixture of products upon H 2 release.…”

Section: Liquid Hydridesmentioning

confidence: 99%

Complex and liquid hydrides for energy storage

et al. 2016

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The research on complex hydrides for hydrogen storage was initiated by the discovery of Ti as a hydrogen sorption catalyst in NaAlH 4 by Boris Bogdanovic in 1996. A large number of new complex hydride materials in various forms and combinations have been synthesized and characterized, and the knowledge regarding the properties of complex hydrides and the synthesis methods has grown enormously since then. A significant portion of the research groups active in the field of complex hydrides is collaborators in the International Energy Agreement Task 32. This paper reports about the important issues in the field of complex hydride research, i.e. the synthesis of borohydrides, the thermodynamics of complex hydrides, the effects of size and confinement, the hydrogen sorption mechanism and the complex hydride composites as well as the properties of liquid complex hydrides. This paper is the result of the collaboration of several groups and is an excellent summary of the recent achievements.

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Section: Liquid Hydridesmentioning

confidence: 99%

Complex and liquid hydrides for energy storage

et al. 2016

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“…Compared with NaBH 4 for hydrogen storage via hydrolysis, unsolvated NaB 3 H 8 has higher solubility and much improved stability in water. [7] In addition, the higher Na to B ratio (1:3) in NaB 3 H 8 compared with NaBH 4 (1:1) also affords highly soluble hydrolytic products. These merits have made NaB 3 H 8 an interesting liquid-phase hydrogen carrier.…”

Section: Synthesis and Characterization Of Unsolvated Nab 3 Hmentioning

confidence: 99%

“…[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%

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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“…On the other hand, two of the derivatives of HB, i.e., LiHB (the α phase) and sodium hydrazinidoborane (NaHB), were analyzed and the variations compared to those of HB. In addition, sodium triborane NaB 3 H 8 (STB; also called sodium octahydrotriborate), another promising boron-based material for energy applications [17], was subjected to a similar study. The main objectives of the work were to scrutinize possible structural changes for the different boranes, to study the evolution of the unit cell dimensions, and to compare the boranes while analyzing the impact of the molecular structure on the crystallographic evolution.…”

Section: Introductionmentioning

confidence: 99%

In situ Synchrotron X-ray Thermodiffraction of Boranes

2016

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Abstract:Boranes of low molecular weight are crystalline materials that have been much investigated over the past decade in the field of chemical hydrogen storage. In the present work, six of them have been selected to be studied by in situ synchrotron X-ray thermodiffraction. The selected boranes are ammonia borane NH 3 BH 3 (AB), hydrazine borane N 2 H 4 BH 3 (HB), hydrazine bisborane N 2 H 4 (BH 3 ) 2 (HBB), lithium LiN 2 H 3 BH 3 (LiHB) and sodium NaN 2 H 3 BH 3 (NaHB) hydrazinidoboranes, and sodium triborane NaB 3 H 8 (STB). They are first investigated separately over a wide range of temperature (80-300 K), and subsequently compared. Differences in crystal structures, the existence of phase transition, evolutions of unit cell parameters and volumes, and variation of coefficients of thermal expansion can be observed. With respect to AB, HB and HBB, the differences are mainly explained in terms of molecule size, conformation and motion (degree of freedom) of the chemical groups (NH 3 , N 2 H 4 , BH 3 ). With respect to LiHB, NaHB and STB, the differences are explained by a stabilization effect favored by the alkali cations via M¨¨¨H interactions with four to five borane anions. The main results are presented and discussed herein.

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High-capacity hydrogen release through hydrolysis of NaB3H8

Cited by 32 publications

References 25 publications

Complex and liquid hydrides for energy storage

Complex and liquid hydrides for energy storage

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

In situ Synchrotron X-ray Thermodiffraction of Boranes

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