Journal of Applied Electrochemistry

, Volume 29, Issue 4, pp 449–454

Factors governing the electrochemical synthesis of α-nickel (ii) hydroxide

Authors

  • R. S. Jayashree
    • Department of Chemistry, Central CollegeBangalore University
  • P. Vishnu Kamath
    • Department of Chemistry, Central CollegeBangalore University
Article

DOI: 10.1023/A:1003493711239

Cite this article as:
Jayashree, R.S. & Kamath, P.V. Journal of Applied Electrochemistry (1999) 29: 449. doi:10.1023/A:1003493711239

Abstract

The electrodeposition of α-nickel hydroxide is promoted by the simultaneous chemical corrosion of the electrode by an acidic nitrate bath. Chemical corrosion results in the formation of a poorly ordered layered phase which is structurally similar to α-nickel hydroxide and provides nucleation sites for the deposition of the latter. Therefore under conditions which enhance corrosion rates such as low current density (<1.3 mA cm−2), high temperature (60 ∘C), high nickel nitrate concentration (≥ 1M) and the resultant low pH (∼1.7), α-nickel hydroxide electrodeposition is observed, while β-nickel hydroxide forms under other conditions. Further, α-nickel hydroxide deposition is more facile on an iron electrode compared to nickel or platinum.

α-nickel hydroxideelectrochemical synthesisnitrate bath
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© Kluwer Academic Publishers 1999