Formation and reduction of nickel(II)hydroxide on Raney-nickel electrodes and its influence on the hydrogen overvoltage
β Scribed by K. Schultze; H. Bartelt
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 448 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0360-3199
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The cathodic reduction of oxygen in concentrated potassium hydroxide (15 wt-% H,O) at 225Β°C is greatly at%cted by the presence of dissolved nickel. This effect shows up both in concentration and activation polarizations. These observations, together with indication8 for the presence of nickel redox
New hydrated cobalt-substituted nickel hydroxides were prepared and characterized. These materials were obtained either by precipitation (a) or by the "chimie douce" technique (a\* and a'). Cobalt generally stays in the trivalent state. In contrast with the aco~+ phases, the aco,\* phases are stable