Potential and current distribution on the surface of a hydrogen gas diffusion anode |
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| Authors: | J J T T Vermeijlen L J J Janssen A J Geurts G C van Haastrecht |
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| Affiliation: | (1) Department of Chemical Engineering, Laboratory of Instrumental Analysis, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands;(2) Department of Mathematics and Computing Science, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands;(3) Department of Packaging Technology, Hoogovens Group B. V., PO Box 10,000, 1970 CA Ijmuiden, The Netherlands;(4) Present address: R&D Department, ODME, PO Box 832, 5600 AV Eindhoven, The Netherlands |
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| Abstract: | The current and potential distribution for a hydrogen gas-diffusion disc electrode with a relatively high ohmic resistance are investigated. A theoretical model for these distributions is presented. Potential differences between the edge of the electrode and points on the electrode surface have been measured for a hydrogen gas-diffusion electrode loaded with various total currents. From the results it is concluded that the proposed model is very useful to obtain the potential and the current density distribution along a hydrogen-gas diffusion disc electrode. Moreover, the allowable size of cylindrical holes in a perforated plate placed against the rear of the gas diffusion electrode for its current supply, can be calculated to achieve a reasonably uniform current distribution along the gas-diffusion electrode. |
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