Vacuum evaporated thin films of mixed cobalt and nickel oxides as electrocatalyst for oxygen evolution and reduction |
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| Authors: | V Rashkova S Kitova I Konstantinov T Vitanov |
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| Affiliation: | a Central Laboratory of Photoprocesses ‘Acad. J. Malinowski’, Bulgarian Academy of Sciences, Acad. G.Bonchev str., bl.109, Sofia 1113, Bulgaria
b Central Laboratory for Electrochemical Power Sources, Bulgarian Academy of Sciences, Acad. G.Bonchev str., bl.10, Sofia 1113, Bulgaria |
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| Abstract: | Mixed cobalt and nickel oxides, obtained by vacuum coevaporation of Co, Ni and TeO2 are investigated as electrocatalysts for oxygen reduction and evolution reaction. Gas-diffusion bifunctional oxygen electrodes (GDE) are prepared by direct deposition of catalyst on gas-supplying membrane. Thus obtained GDE with different atomic ratio RCo/Ni and R(Co+Ni)/Te of the catalyst are electrochemically tested by means of steady-state voltammetry. It is shown that the films exhibit high catalytic activity toward both oxygen reduction and evolution reactions despite very small catalyst loading of about 0.07 mg cm−2. |
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| Keywords: | Oxygen reduction Oxygen evolution Electrocatalysts Cobalt and nickel oxides |
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