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Overvoltage phenomena in electrochemical cells with oxygen-saturated copper electrodes

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Abstract

Upon passing small currents (1 to 25 ώA) through the cell: Cu, Cu2O | Cu | ZrO2 (7.5 wt pet CaO) I Cu I Cu, Cu2O steady-state overvoltages have been determined at temperatures between 800 and 1000°C. Quantitative analysis of the results confirms that the steady-state overvoltage is established by oxygen concentration gradients in the copper-foil electrodes. The solubility-d’ffusivity product of oxygen in solid copper has been calculated from the measured overvoltages. Values for the diffusivity of oxygen in copper have also been obtained.

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Authors and Affiliations

  1. Department of Metallurgical Engineering, ITT, Kanpur, India

    T. A. Ramanarayanan (Assistant Professor)

  2. Department of Metallurgy and Materials Science, University of Pennsylvania, 19174, Philadelphia, Pennsylvania

    W. L. Worrell (Professor)

Authors
  1. T. A. Ramanarayanan
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  2. W. L. Worrell
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T. A. Ramanarayanan, formerly post-doctoral fellow, Department of Metallurgy and Materials Science, University of Pennsylvania

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Ramanarayanan, T.A., Worrell, W.L. Overvoltage phenomena in electrochemical cells with oxygen-saturated copper electrodes. Metall Trans 5, 1773–1777 (1974). https://doi.org/10.1007/BF02644140

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