Potential and current distribution on the surface of a hydrogen gas diffusion anode

J.J.T.T. Vermeijlen, L.J.J. Janssen, A.J. Geurts, G.C Haastrecht, van

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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.
Original languageEnglish
Pages (from-to)1122-1127
Number of pages6
JournalJournal of Applied Electrochemistry
Volume25
Issue number12
DOIs
Publication statusPublished - 1995

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