Abstract
Phosphate-bonded composite nickel electrodes with a nickel content of 98 wt% are investigated for electrolytic performances towards the hydrogen evolution in 30 w/o KOH at 70°C. Electrodes made of 98 wt% spiky filamentary nickel powder have a hydrogen overpotential of −196 mV at 250 mA cm −2 in 30 w/o KOH at 70°C. An improvement in the performance of phosphate-bonded nickel electrodes towards the HER is obtained by adding a leachable compound to the electrode material.
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