Facile solvent-free synthesis of anhydrous alkali metal dodecaborate M 2B12H12 (M = Li, Na, K)

Liqing He, Haiwen Li, Son Jong Hwang, Etsuo Akiba

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Metal dodecaborate, widely regarded as an obstacle of the rehydrogenation of high-density hydrogen storage materials metal borohydrides M(BH 4)n, is generally synthesized using liquid-phase process followed by a careful dehydration process. In this study, we propose a new and facile solvent-free synthesis process of dodecaborates using B 10H14 with a low melting point of 99.6 °C as a boron source. As a case study, our first challenge focused on the syntheses of anhydrous M2B12H12 (M = Li, Na, and K) by heat treatment of starting materials (a) 2MH + 1.2B10H14 or (b) 2MBH4 + B10H14 at 200-450 °C conditions, which have been proved to be successful for the first time by X-ray diffraction (XRD), Raman, and NMR analysis. Starting materials (b) 2MBH4 + B 10H14 shows better reactivity than that of (a) 2MH + 1.2B10H14, which demonstrates that synthesis of anhydrous M2B12H12 by heat treatment of 2MBH4 + B10H14 is a feasible solvent-free process.

Original languageEnglish
Pages (from-to)6084-6089
Number of pages6
JournalJournal of Physical Chemistry C
Volume118
Issue number12
DOIs
Publication statusPublished - Mar 27 2014

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Alkali Metals
Alkali metals
alkali metals
heat treatment
synthesis
Metals
Heat treatment
Borohydrides
Boron
borohydrides
Hydrogen storage
Dehydration
dehydration
metals
melting points
Melting point
liquid phases
boron
reactivity
Nuclear magnetic resonance

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Facile solvent-free synthesis of anhydrous alkali metal dodecaborate M 2B12H12 (M = Li, Na, K). / He, Liqing; Li, Haiwen; Hwang, Son Jong; Akiba, Etsuo.

In: Journal of Physical Chemistry C, Vol. 118, No. 12, 27.03.2014, p. 6084-6089.

Research output: Contribution to journalArticle

He, Liqing ; Li, Haiwen ; Hwang, Son Jong ; Akiba, Etsuo. / Facile solvent-free synthesis of anhydrous alkali metal dodecaborate M 2B12H12 (M = Li, Na, K). In: Journal of Physical Chemistry C. 2014 ; Vol. 118, No. 12. pp. 6084-6089.
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