Bibliographic Details
| Title: |
Autoclave Synthesis of Finely Divided Nickel Powders. |
| Authors: |
Belousov, O. V., Borisov, R. V., Belousova, N. V., Zeer, G. M., Romanchenko, A. S. |
| Source: |
Russian Journal of Inorganic Chemistry; Oct2021, Vol. 66 Issue 10, p1463-1468, 6p |
| Abstract: |
The reduction of divalent nickel with hydrazine hydrate from alkaline ammonia solutions at elevated temperatures was studied. A procedure to synthesize finely divided nickel powders was proposed. The morphology of the objects obtained under various synthesis conditions was investigated by scanning electron microscopy; it was shown that both needle-like and spherical particles can form. The specific surface area of the synthesized metallic nickel powders was determined by low-temperature nitrogen adsorption to be within the range 5–20 m2/g, depending on the synthesis conditions (the concentration of the initial salt in the solution, the pH, and the temperature). X-ray powder diffraction analysis showed that all the powders are mixtures of two phases: nickel (to 99%) and nickel hydroxide. X-ray photoelectron spectroscopy demonstrated that a particle of the powders consists of a nickel(0) core coated with several atomic layers of nickel hydroxide. [ABSTRACT FROM AUTHOR] |
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| Database: |
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