Perovskite alkali metal samarium borohydrides: Crystal structures and thermal decomposition
dc.contributor.author | Moller, Kasper | |
dc.contributor.author | Jørgensen, M. | |
dc.contributor.author | Fogh, A. | |
dc.contributor.author | Jensen, Torben | |
dc.date.accessioned | 2018-12-13T09:10:02Z | |
dc.date.available | 2018-12-13T09:10:02Z | |
dc.date.created | 2018-12-12T02:46:55Z | |
dc.date.issued | 2017 | |
dc.identifier.citation | Moller, K. and Jørgensen, M. and Fogh, A. and Jensen, T. 2017. Perovskite alkali metal samarium borohydrides: Crystal structures and thermal decomposition. Dalton Transactions. 46 (35): pp. 11905-11912. | |
dc.identifier.uri | http://hdl.handle.net/20.500.11937/71435 | |
dc.identifier.doi | 10.1039/c7dt02405c | |
dc.description.abstract |
© 2017 The Royal Society of Chemistry. A new synthesis method of samarium borohydride, Sm(BH4)2, using tetrahydrofuran borane, THF-BH3, and samarium hydride, SmH2, has been demonstrated and verified. The synthesised Sm(BH4)2was mechanochemically treated with MBH4, M = K, Rb, Cs. Initially, the formation of KSm(BH4)3is observed while subsequent heat treatment is necessary to form MSm(BH4)3, M = Rb, Cs. The new compounds crystallise in orthorhombic unit cells adopting perovskite-type 3D frameworks containing distorted [Sm(BH4)6] octahedra. In situ X-ray diffraction studies reveal two second-order polymorphic transitions of a-CsSm(BH4)3via a tetragonal intermediate, a'-CsSm(BH4)3, into a cubic high-temperature polymorph, ß-CsSm(BH4)3, resembling an ideal perovskite structure. The new compounds, MSm(BH4)3, are thermally stable up to T ~ 280 °C after which they decompose into mainly MBH4, SmH2and possibly SmB6and SmB12H12. Finally, after three cycles of hydrogen release and uptake, the storage capacity was 1.0 wt% for KSm(BH4)3and 0.84 wt% for RbSm(BH4)3and CsSm(BH4)3. | |
dc.publisher | R S C Publications | |
dc.title | Perovskite alkali metal samarium borohydrides: Crystal structures and thermal decomposition | |
dc.type | Journal Article | |
dcterms.source.volume | 46 | |
dcterms.source.number | 35 | |
dcterms.source.startPage | 11905 | |
dcterms.source.endPage | 11912 | |
dcterms.source.issn | 1477-9226 | |
dcterms.source.title | Dalton Transactions | |
curtin.department | School of Electrical Engineering, Computing and Mathematical Science (EECMS) | |
curtin.accessStatus | Fulltext not available |
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