Chemistry:Dinickel boride
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| Ni2B | |
| Molar mass | 128.2 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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Dinickel boride is a chemical compound of nickel and boron with formula Ni2B.[1][2] It is one of the borides of nickel.
The formula "Ni2B" and the name "nickel boride" are often used for a nickel-boron catalyst obtained by reacting nickel salts with sodium borohydride. However, that product is not a well-defined compound, and its bulk formula is closer to Na2.5B(sic).[3]
Synthesis
Dinickel boride can be obtained (together with other nickel borides) by heating sodium borohydride with powdered nickel metal up 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
- 2Ni + 2B2H6 + NaH ↔ Ni2B + 3BH3 + 2H2 + Na
but other reactions occur, yielding other borides.[4]
See also
References
- ↑ 1.0 1.1 US National Institutes of Health (2020): "Nickel boride (Ni2B)". Compound page at the NCBI PubChem site. Accessed on 2020-07-18.
- ↑ Bjurstrom, T. (March 1933). "Röntgenanalyse der Systeme Eisen-Bor, Kobalt-Bor und Nickel-Bor". Arkiv för kemi, mineralogi och geologi 11A (5).
- ↑ Hofer, L. J. E.; Shultz, J. F.; Panson, R. D.; Anderson, R. B. (December 1964). "The Nature of the Nickel Boride Formed by the Action of Sodium Borohydride on Nickel Salts" (in en). Inorganic Chemistry 3 (12): 1783–1785. doi:10.1021/ic50022a031. ISSN 0020-1669. https://pubs.acs.org/doi/abs/10.1021/ic50022a031.
- ↑ Shahbazi, Mahboobeh; Cathey, Henrietta; Danilova, Natalia; Mackinnon, Ian (2018-07-22). "Single Step Process for Crystalline Ni-B Compounds" (in en). Materials 11 (7): 1259. doi:10.3390/ma11071259. ISSN 1996-1944. PMID 30037149. Bibcode: 2018Mate...11.1259S.
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