Dinickel boride

Dinickel boride is a chemical compound of nickel and boron with formula Ni
2B.[2][1] 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
Properties
Ni2B
Molar mass 128.2 g/mol
Hazards
GHS pictograms
GHS Signal word Danger
GHS hazard statements
 H317, H350i, H372, H400, 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.[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]

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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. 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


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