This work was aimed to test the possibility of using porous (packed bed) flow‐through electrodes for generating hydrogen electrolytically. It has been shown that this electrode system can be used for this purpose. The system chosen for study was copper electrodes in
H2SO4
media. Measurements were obtained over a range of variables, e.g., particle size, flow rate, and electrode material and thickness. Over the tested range of variables, variations in the electrolyte flow rate did not affect the current‐polarization relations. On the other hand, the electrolyte concentration was found to affect the current‐polarization relations. This behavior has been accounted for. It was concluded that concentration polarization is negligible, and the polarization behavior of the electrode is controlled by activation polarization, and by the ohmic potential drop in the pore electrolyte. The effect of electroplated Ag and Pt on the current‐polarization relations has been evaluated and explained.
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