Dinickel boride

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Dinickel boride
Ni2B.png
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.031.345 Edit this at Wikidata
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).

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

The formula "Ni
2
B
" 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
2.5
B
(sic).[3]

Synthesis[edit]

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

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

See also[edit]

References[edit]

  1. ^ a b US National Institutes of Health (2020): "Nickel boride (Ni2B)". Compound page at the NCBI PubChem site. Accessed on 2020-07-18.
  2. ^ T. Bjurstrom, Arkiv Kemi, Mineral. Geol., 11A, No. 5, (1933).
  3. ^ 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
  4. ^ 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