Novel solvates M(BH4)3S(CH3)2 and properties of halide-free M(BH4)3 (M = Y or Gd)
Rare earth metal borohydrides have been proposed as materials for solid-state hydrogen storage because of their reasonably low temperature of decomposition. New synthesis methods, which provide halide-free yttrium and gadolinium borohydride, are presented using dimethyl sulfide and new solvates as i...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
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R S C Publications
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/39719 |
| _version_ | 1848755667365527552 |
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| author | Ley, M. Paskevicius, Mark Schouwink, P. Richter, B. Sheppard, Drew Buckley, Craig Jensen, T. |
| author_facet | Ley, M. Paskevicius, Mark Schouwink, P. Richter, B. Sheppard, Drew Buckley, Craig Jensen, T. |
| author_sort | Ley, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Rare earth metal borohydrides have been proposed as materials for solid-state hydrogen storage because of their reasonably low temperature of decomposition. New synthesis methods, which provide halide-free yttrium and gadolinium borohydride, are presented using dimethyl sulfide and new solvates as intermediates. The solvates M(BH4)3S(CH3)2 (M = Y or Gd) are transformed to a-Y(BH4)3 or Gd(BH4)3 at ~140 °C as verified by thermal analysis. The monoclinic structure of Y(BH4)3S(CH3)2, space group P21/c, a = 5.52621(8), b = 22.3255(3), c = 8.0626(1) Å and ß = 100.408(1)°, is solved from synchrotron radiation powder X-ray diffraction data and consists of buckled layers of slightly distorted octahedrons of yttrium atoms coordinated to five borohydride groups and one dimethyl sulfide group. Significant hydrogen loss is observed from Y(BH4)3 below 300 °C and rehydrogenation at 300 °C and p(H2) = 1550 bar does not result in the reformation of Y(BH4)3, but instead yields YH3. Moreover, composites systems Y(BH4)3–LiBH4 1 : 1 and Y(BH4)3–LiCl 1 : 1 prepared from as-synthesised Y(BH4)3 are shown to melt at 190 and 220 °C, respectively. |
| first_indexed | 2025-11-14T08:59:57Z |
| format | Journal Article |
| id | curtin-20.500.11937-39719 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:59:57Z |
| publishDate | 2014 |
| publisher | R S C Publications |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-397192017-09-13T14:30:05Z Novel solvates M(BH4)3S(CH3)2 and properties of halide-free M(BH4)3 (M = Y or Gd) Ley, M. Paskevicius, Mark Schouwink, P. Richter, B. Sheppard, Drew Buckley, Craig Jensen, T. Rare earth metal borohydrides have been proposed as materials for solid-state hydrogen storage because of their reasonably low temperature of decomposition. New synthesis methods, which provide halide-free yttrium and gadolinium borohydride, are presented using dimethyl sulfide and new solvates as intermediates. The solvates M(BH4)3S(CH3)2 (M = Y or Gd) are transformed to a-Y(BH4)3 or Gd(BH4)3 at ~140 °C as verified by thermal analysis. The monoclinic structure of Y(BH4)3S(CH3)2, space group P21/c, a = 5.52621(8), b = 22.3255(3), c = 8.0626(1) Å and ß = 100.408(1)°, is solved from synchrotron radiation powder X-ray diffraction data and consists of buckled layers of slightly distorted octahedrons of yttrium atoms coordinated to five borohydride groups and one dimethyl sulfide group. Significant hydrogen loss is observed from Y(BH4)3 below 300 °C and rehydrogenation at 300 °C and p(H2) = 1550 bar does not result in the reformation of Y(BH4)3, but instead yields YH3. Moreover, composites systems Y(BH4)3–LiBH4 1 : 1 and Y(BH4)3–LiCl 1 : 1 prepared from as-synthesised Y(BH4)3 are shown to melt at 190 and 220 °C, respectively. 2014 Journal Article http://hdl.handle.net/20.500.11937/39719 10.1039/c4dt01125b R S C Publications fulltext |
| spellingShingle | Ley, M. Paskevicius, Mark Schouwink, P. Richter, B. Sheppard, Drew Buckley, Craig Jensen, T. Novel solvates M(BH4)3S(CH3)2 and properties of halide-free M(BH4)3 (M = Y or Gd) |
| title | Novel solvates M(BH4)3S(CH3)2 and properties of halide-free M(BH4)3 (M = Y or Gd) |
| title_full | Novel solvates M(BH4)3S(CH3)2 and properties of halide-free M(BH4)3 (M = Y or Gd) |
| title_fullStr | Novel solvates M(BH4)3S(CH3)2 and properties of halide-free M(BH4)3 (M = Y or Gd) |
| title_full_unstemmed | Novel solvates M(BH4)3S(CH3)2 and properties of halide-free M(BH4)3 (M = Y or Gd) |
| title_short | Novel solvates M(BH4)3S(CH3)2 and properties of halide-free M(BH4)3 (M = Y or Gd) |
| title_sort | novel solvates m(bh4)3s(ch3)2 and properties of halide-free m(bh4)3 (m = y or gd) |
| url | http://hdl.handle.net/20.500.11937/39719 |