The anodic oxidation of nickel in alkaline solution |
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| Authors: | W. Visscher E. Barendrecht |
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| Affiliation: | Laboratory of Electrochemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands |
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| Abstract: | The anodic oxidation of nickel in alkaline solution was studied by cyclovoltammetric and optical techniques. The range of the scanning potential effects the resulting voltammograms. A constant I-E diagram with anodic peaks at 130 and 270 mV (at scan rate 10 mV · s?1) is obtained after multiple scanning from ?800 to + 1200mV. The layer of Ni(OH)2 that is formed in the anodic cycle, is only partially reduced by cathodic polarisation. Growth of the Ni(OH)2 film on Ni occurs by repeated oxidation and reduction. This occurs via oxidation of Ni to α Ni(OH)2 and conversion of α Ni(OH)2 to β Ni(OH)2. |
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