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Applications of porous flow-through electrodes. III. Effect of gas evolution on the pore electrolyte resistance

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Abstract

Gas evolution, within the pores of porous flow-through electrodes, was found to have significant effects on the pore electrolyte resistance. An electrical circuit was used whereby the pore electrolyte resistance was measured during hydrogen evolutionin situ within the porous electrode. The resistance was measured for packed bed electrodes of Cu turnings, Cu wool and Ag wool at various rates of hydrogen evolution. The pore electrolyte resistance increased with the rate of hydrogen evolution in the order Cu turnings > Cu wool (shreds) > Ag wool (hair-like fibres). The gas void fraction was calculated, using Bruggeman's equations at various rates of hydrogen evolution. It was shown that the mode of variation of pore electrolyte resistance with the rate of hydrogen evolution can be explained on the basis of the variations in the gas void fraction. In all cases, it was found that the volume of gas retained within the porous bed depends on the rate of gas evolution rather nonlinearly.

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Author notes

  1. B. G. Ateya

    Present address: Chemistry Department, Faculty of Science, University of the United Arab Emirates, Al-Ain, Abu Dhabi

Authors and Affiliations

  1. Chemistry Department, Faculty of Science, Cairo University, Cairo, Egypt

    B. G. Ateya & M. E. El-Shakre

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  1. B. G. Ateya
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  2. M. E. El-Shakre
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Ateya, B.G., El-Shakre, M.E. Applications of porous flow-through electrodes. III. Effect of gas evolution on the pore electrolyte resistance. J Appl Electrochem 14, 367–371 (1984). https://doi.org/10.1007/BF01269937

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  • DOI: https://doi.org/10.1007/BF01269937

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