Chemistry:Trinickel boride
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| Properties | |
| Ni3B | |
| Molar mass | 186.89 g/mol |
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| GHS Signal word | Danger |
| H317, H350i, H372, H410 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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Trinickel boride is a compound of nickel and boron with chemical formula Ni3B. It is one of the borides of nickel.
The compound was described in 1959 by R. Fruchart,[2] S. Rundquist,[3] and L. H. Anderson and R. Kiessling.[4] It is a hard solid with the cementite crystal structure.[5]
Synthesis
Trinickel boride can be obtained, as grains embedded in a nickel matrix, by heating Brown's P-1 and P-2 "nickel boride"catalyst to 250 °C. This catalyst is produced by reduction of nickel salts with sodium borohydride.[5]
Trinickel boride can be obtained also by compressing nickel and boron powders with explosives.[6]
Recently it has been found that Ni3B can be formed (together with other nickel borides) by heating sodium borohydride with powdered nickel metal to 670 °C in a closed vessel, so that the released hydrogen creates a pressure of up to 3.4 MPa. The main reactions can be summarized as
- 2NaBH4 ↔ 2NaH + B2H6
- 3Ni + 2B2H6 + NaH ↔ Ni3B + 3BH3 + 2H2 + Na
but other reactions occur, yielding other borides.[7]
See also
References
- ↑ US National Institutes of Health (2020): "Nickel boride (Ni3B)". Compound page at the NCBI PubChem site. Accessed on 2020-07-18.
- ↑ R. Fruchart, Ann. Chim., 4, 1247 (1959).
- ↑ S. Rundquist, Acta Chem. Scand., 12, 658 (1959).
- ↑ L. H. Anderson and R. Kiessling, Acta Chem. Scand., 4, 160 (1950).
- ↑ 5.0 5.1 L. J. E. Hofer, J. F. Shultz, R. D. Panson, and R. B. Anderson (1964): "The nature of the nickel boride formed by the action of sodium borohydride on nickel salts". Inorganic Chemistry, volume 3, issue 12, pages 1783–1785. doi:10.1021/ic50022a031
- ↑ Michail A. Korchagin, Dina V. Dudina, Boris B. Bokhonov, Natalia V. Bulina, Arina V. Ukhina, and Igor S. Batraev (2018): "Synthesis of nickel boride by thermal explosion in ball-milled powder mixtures". Journal of Materials Science, volume 2018, issue 19. doi:10.1007/s10853-018-2290-8
- ↑ Mahboobeh Shahbazi, Henrietta Cathey, Natalia Danilova and Ian D.R. Mackinnon (2018): "Single Step Process for Crystalline Ni-B Compounds". Materials, volume 11, issue 7, article 1259-. doi:10.3390/ma11071259
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