Formation of CaB6 in the thermal decomposition of the hydrogen storage material Ca(BH4)2
2016-07-20 | Zeitschriftenartikel; Forschungsarbeit
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Formation of CaB6 in the thermal decomposition of the hydrogen storage material Ca(BH4)2
Sahle, C. J.; Sternemann, C.; Giacobbe, C.; Yan, Y.; Weis, C.; Harder, M. & Forov, Y. u.a. (2016)
Physical Chemistry, Chemical Physics, 18(29) pp. 19866-19872. DOI: https://doi.org/10.1039/c6cp02495e
Dokumente & Medien
Details
- Autor(en)
- Sahle, Christoph J.; Sternemann, Christian; Giacobbe, Carlotta; Yan, Yigang; Weis, Christopher; Harder, Manuel; Forov, Yury; Spiekermann, Georg; Tolan, Metin ; Krisch, Michael; Remhof, Arndt
- Zusammenfassung
- 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.
- Erscheinungsdatum
- 20-Juli-2016
- Zeitschrift
- Physical Chemistry, Chemical Physics
- eISSN
- 1463-9084
- Sprache
- Englisch