Dinickel boride
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3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.031.345 |
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| Ni2B | |
| Molar mass | 128.2 g/mol |
| Hazards | |
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| 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 Ni
2B.[2][1] It is one of the borides of nickel.
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]
See also
References
- ^ a b US National Institutes of Health (2020): "Nickel boride (Ni2B)". Compound page at the NCBI PubChem site. Accessed on 2020-07-18.
- ^ T. Bjurstrom, Arkiv Kemi, Mineral. Geol., 11A, No. 5, (1933).
- ^ 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
- ^ 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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