Dinickel boride

Dinickel boride is a chemical compound of nickel and boron with formula Ni
2B.[1][2] It is one of the borides of nickel.

This article is about the crystalline compound. For the catalyst improperly called "nickel boride" or "Ni2B", see nickel boride catalyst.
Dinickel boride
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.031.345
EC Number
  • 234-494-6
  • InChI=1S/B.2Ni
    Key: WRLJWIVBUPYRTE-UHFFFAOYSA-N
  • [B].[Ni].[Ni]
Properties
Ni2B
Molar mass 128.2 g/mol
Hazards
GHS labelling:
GHS07: Exclamation markGHS08: Health hazardGHS09: Environmental hazard
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).
Infobox references

The formula "Ni
2B" 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 Na
2.5B(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

2NaBH
4 ↔ 2NaH + B
2H
6
2Ni + 2B
2H
6 + NaH ↔ Ni
2B + 3BH
3 + 2H
2 + Na

but other reactions occur, yielding other borides.[4]

See also

References
  1. US National Institutes of Health (2020): "Nickel boride (Ni2B)". Compound page at the NCBI PubChem site. Accessed on 2020-07-18.
  2. Bjurstrom, T. (March 1933). "Röntgenanalyse der Systeme Eisen-Bor, Kobalt-Bor und Nickel-Bor" [X-ray analysis of the iron-boron, cobalt-boron, and nickel-boron systems]. Arkiv för kemi, mineralogi och geologi. 11A (5).
  3. 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". Inorganic Chemistry. 3 (12): 1783–1785. doi:10.1021/ic50022a031. ISSN 0020-1669.
  4. Shahbazi, Mahboobeh; Cathey, Henrietta; Danilova, Natalia; Mackinnon, Ian (2018-07-22). "Single Step Process for Crystalline Ni-B Compounds". Materials. 11 (7): 1259. Bibcode:2018Mate...11.1259S. doi:10.3390/ma11071259. ISSN 1996-1944. PMC 6073427. PMID 30037149.
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