Abstract
The aim of this work was to test the feasibility of using porous graphite electrodes as cathodes for the electrolytic production of hydrogen fro_m flowing alkaline solutions. The platinum loading on the graphite substrate was found to decrease the potential required to sustain a certain rate of hydrogen production, and hence the energy consumed during electrolysis. The experimental i/E relations agreed with those theoretically predicted on the basis of a mathematical model up to a current density of about 200 mA cm−2. The excessive polarization at higher current is attributed to trapping of hydrogen gas bubbles within the porous electrode.
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