Journal
ELECTROCHIMICA ACTA
Volume 47, Issue 10, Pages 1555-1560Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0013-4686(01)00897-0
Keywords
oxygen reduction; oxygen evolution; electrocatalysts; cobalt and nickel oxides
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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 R-Co/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). (C) 2002 Elsevier Science Ltd. All rights reserved.
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