Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7722640 | International Journal of Hydrogen Energy | 2013 | 8 Pages |
Abstract
Systematic investigations of MBH4âVCl2, M = Li, Na, or K, 2:1 or 3:1, samples prepared by mechano-chemistry and different milling time in order to gain insight in the phase stability and search for novel borohydrides. The samples were investigated using powder X-ray diffraction and Raman spectroscopy. Subsequently, the samples were exposed to heat treatment and investigated by in-situ synchrotron radiation powder X-ray diffraction (SR-PXD). These studies reveal formation of numerous compounds during decomposition of the samples, which contrasts with previous investigations. In several cases the formed compounds were in a less well-crystalline state, which did not allow identification. One of the unidentified compounds was observed both in the LiBH4âVCl2 and NaBH4âVCl2 systems and appeared to decompose at T â¼Â 190 °C and is assumed to be a new vanadium borohydride. Crystalline Li2VCl4 was observed, but a major fraction of the decomposition products appeared to be amorphous. The KBH4âVCl2 system revealed formation of well-crystalline solid solutions of K(BH4)1âxClx.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Dmytro Korablov, Dorthe B. Ravnsbæk, Voraksmy Ban, Yaroslav Filinchuk, Flemming Besenbacher, Torben R. Jensen,