Formation of CaB6 in the thermal decomposition of the hydrogen storage material Ca(BH4)2
2016-07-20 | journal article; research paper
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Sahle, Christoph J., Christian Sternemann, Carlotta Giacobbe, Yigang Yan, Christopher Weis, Manuel Harder, Yury Forov et al. "Formation of CaB6 in the thermal decomposition of the hydrogen storage material Ca(BH4)2." Physical Chemistry, Chemical Physics 18, no. 29 (2016): 19866-19872. https://doi.org/10.1039/c6cp02495e.
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- Authors
- Sahle, Christoph J.; Sternemann, Christian; Giacobbe, Carlotta; Yan, Yigang; Weis, Christopher; Harder, Manuel; Forov, Yury; Spiekermann, Georg; Tolan, Metin ; Krisch, Michael; Remhof, Arndt
- Abstract
- Using a combination of high resolution X-ray powder diffraction and X-ray Raman scattering spectroscopy at the B K- and Ca L2,3-edges, we analyzed the reaction products of Ca(BH4)2 after annealing at 350 °C and 400 °C under vacuum conditions. We observed the formation of nanocrystalline/amorphous CaB6 mainly and found only small contributions from amorphous B for annealing times larger than 2 h. For short annealing times of 0.5 h at 400 °C we observed neither CaB12H12 nor CaB6. The results indicate a reaction pathway in which Ca(BH4)2 decomposes to B and CaH2 and finally reacts to form CaB6. These findings confirm the potential of using Ca(BH4)2 as a hydrogen storage medium and imply the desired cycling capabilities for achieving high-density hydrogen storage materials.
- Issue Date
- 20-July-2016
- Journal
- Physical Chemistry, Chemical Physics
- eISSN
- 1463-9084
- Language
- English