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

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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.

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Authors and Affiliations

  1. Department of Chemistry, Central College, Bangalore University, Bangalore, 560001, India

    R. S. Jayashree & P. Vishnu Kamath

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  1. R. S. Jayashree
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  2. P. Vishnu Kamath
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Jayashree, R.S., Kamath, P.V. Factors governing the electrochemical synthesis of α-nickel (ii) hydroxide. Journal of Applied Electrochemistry 29, 449–454 (1999). https://doi.org/10.1023/A:1003493711239

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