12046-54-7Relevant articles and documents
Nanostructuring of Strontium Hexaboride via Lithiation
Ramachandran, Roshini,Salguero, Tina T.
, p. 4 - 7 (2018)
We describe the top-down nanostructuring of a metal boride using SrB6 as an example. To accomplish this transformation, we demonstrate (1) the direct lithiation of a metal boride using n-butyllithium and then (2) the reactive disassembly of Li-SrB6 into nanoparticles using water. The identity of the Li-SrB6 intermediate, a mixture of Li2B6, LixSr1-2xB6, and SrB6 phases, was established by powder X-ray diffraction (PXRD), solid-state 11B and 7Li NMR, transmission electron microscopy, selected-area electron diffraction, and scanning electron microscopy. The necessary 2Li+/Sr2+ substitution is enabled by cation mobility within the hexaboride lattice. The subsequent reaction with water results in Li2B6 decomposition and the release of 6 nanoparticles, which were characterized by PXRD, solid-state 11B and 7Li NMR, and high-resolution TEM. This chemistry opens new solution-based modification and processing options for metal borides.
Hydrogen storage properties of LiBH4 destabilized by SrH 2
Liu,Huang,Si,Zhang
, p. 8 - 11 (2013)
In this work, we have succeeded in destabilizing LiBH4 by the addition of SrH2, via the reaction 6LiBH4 + SrH 2 → SrB6 + 6LiH + 10H2 with a theoretical hydrogen capacity of 9.1 wt.%. According to the van't Hoff and Arrhenius equations, the dehydrogenation enthalpy change and activation energy for the LiBH4/SrH2 system were experimentally determined to be 48 kJ/mol H2 and 64 kJ/mol, respectively. Both are remarkably reduced in comparison with the pristine LiBH4, which is responsible for the improved dehydrogenation property of the LiBH4/SrH2 system. The dehydrogenated products SrB6 + 6LiH can be rehydrogenated to form LiBH4 and LiSrH3 at 723 K under an initial hydrogen pressure of 8.0 MPa.
Improvement of thermoelectric properties of alkaline-earth hexaborides
Takeda, Masatoshi,Terui, Manabu,Takahashi, Norihito,Ueda, Noriyoshi
, p. 2823 - 2826 (2008/10/09)
Thermoelectric (TE) and transport properties of alkaline-earth hexaborides were examined to investigate the possibility of improvement in their TE performance. As carrier concentration increased, electrical conductivity increased and the absolute value of
