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Calcium Borohydride for Hydrogen Storage: Catalysis and Reversibility
Abstract
We demonstrate a new solid-state synthesis route to prepare calcium borohydride, Ca(BH4)2, by reacting a ball-milled mixture of CaB(6) and CaH(2) in a molar ratio of 1:2 at 700 bar of H2 pressure and 400-440 degrees C. Moreover, doping with catalysts was found to be crucial to enhance reaction kinetics. Thermogravimetric analysis and differential scanning calorimetry revealed a reversible low-temperature to high-temperature endothermic phase transition at 140 degrees C and another endothermic phase transition at 350-390 degrees C associated with hydrogen release upon formation of CaB(6) and CaH(2), as was evident from X-ray diffraction analysis. Thus, since Ca(BH(4))(2) here is shown to be prepared from its anticipated decomposition products, the conclusion is that it has potential to be utilized as a reversible hydrogen storage material. The theoretical reversible capacity was 9.6 wt % hydrogen.
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Cited by
B–N compounds for chemical hydrogenstorage
Hamilton, C. W., Baker, R. T., Staubitz, A., & Manners, I. (2009) · Chem. Soc. Rev. · doi:10.1039/b800312m · Cited by 1,087
Hydrogen storage: beyond conventional methods
Dalebrook, A. F., Gan, W., Grasemann, M., Moret, S., & Laurenczy, G. (2013) · Chemical Communications · doi:10.1039/c3cc43836h · Cited by 503
Metadata
- Authors
- Rönnebro, E., & Majzoub, E. H.
- Venue
- The Journal of Physical Chemistry B
- Publisher
- American Chemical Society (ACS)
- Published
- 2007-10-01
- Volume
- 111
- Issue
- 42
- Pages
- 12045-12047
- ISSN
- 1520-5207 (ISSN-L)
- 1520-6106
- OpenAlex
- W2047029129
- Cited by
- 200
- References
- 0
- FWCI
- 9.87
- Type
- journal article
- Language
- en
- Open access
- closed
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- Rönnebro, E., & Majzoub, E. H. (2007). Calcium Borohydride for Hydrogen Storage: Catalysis and Reversibility. The Journal of Physical Chemistry B. https://doi.org/10.1021/jp0764541
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