 ISSN 0235-7216 ISSN 2424-4538 (online) |
2008 m. Nr. 1 Oxygen evolution on composite ruthenium and nickel oxides electrode
Electrochemical behavior of a composite layer of RUO2 and NiO deposited on nickel and titanium electrodes has been studied in acidic, neutral and alkaline media with and without chloride. Cyclic voltammetry was used for the electrochemical studies, whereas the methods of X-ray electron spectroscopy and scanning electron microscopy were employed for the investigation of the oxide layer composition and surface morphology. It has been found that the composite layer of RuO2 and NiO deposited thermally on titanium electrode has a synergetic catalytic effect on the evolution process of O2 in both strongly acidic and strongly alkaline media. It has been shown that Ti/RuO2⋅NiO electrode can be used for obtaining pure oxygen by electrolyzing sea water alkalized to pH ≥ 4. Keywords: oxygen evolution, ruthenium, nickel, oxide electrode |
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