Yan, Yigang Remhof, Arndt Mauron, Philippe Rentsch, Daniel Lodziana, Zbigniew Lee, Young-Su Lee, Hyun-Sook Cho, Young Whan Zuettel, Andreas 2024-01-20T12:30:52Z 2024-01-20T12:30:52Z 2021-09-05 2013-05-02 1932-7447 https://pubs.kist.re.kr/handle/201004/128069 Controlling the dehydrogenation process in a suitable reaction route by choosing the appropriate reaction conditions is crucial for a hydrogen storage system. The dehydrogenation process of the eutectic 0.68LiBH(4)-0.32Ca(BH4)(2) mixture was investigated by dynamic pressure composition isotherms, X-ray diffraction, and solid-state nuclear magnetic resonance in order to determine the optimal reaction route for the dehydrogenation and to improve the hydrogen absorption reaction. In a temperature range from 330 to 450 degrees C, the LiBH4-Ca(BH4)(2) mixture decomposes in two major steps. First, Ca(BH4)(2) decomposes into CaH2, CaB6, CaB12H12, H-2, and probably amorphous boron. Second, CaH2 reacts with LiBH4 to CaB6, LiH, and H-2. Li2B12H12 has been identified as a byproduct It was observed that the lower dehydrogenation temperature, the more CaB6 and the less [B12H12](2-) containing phases are present in the final dehydrogenation products, resulting in improved. absorption performance. The temperature dependence is discussed, providing instructions to improve reversibility for potential applications and new insights into the hydrogen sorption mechanism of metal borohydrides. English American Chemical Society HYDROGEN STORAGE PROPERTIES SORPTION PROPERTIES METAL BOROHYDRIDES NMR DECOMPOSITION STABILITY PRESSURE MG LI DIFFRACTION Controlling the Dehydrogenation Reaction toward Reversibility of the LiBH4-Ca(BH4)(2) Eutectic System Article 10.1021/jp401628g 1 The Journal of Physical Chemistry C, v.117, no.17, pp.8878 - 8886 The Journal of Physical Chemistry C 117 17 8878 8886 scie scopus 000318536600033 2-s2.0-84877066281 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article HYDROGEN STORAGE PROPERTIES SORPTION PROPERTIES METAL BOROHYDRIDES NMR DECOMPOSITION STABILITY PRESSURE MG LI DIFFRACTION