Abstract
Several LaNi 5-type alloy electrodes were prepared and their cathodic polarization characteristics in alkaline solutions were investigated. As a result, they were found to have a high electrocatalytic activity for the hydrogen evolution reaction compared with the constituent metals, and their activities were almost comparable with those of platinum and palladium electrodes. Such a synergism was attributed to the large heat of formation of these alloys. The surface damage of these alloy electrodes was also found to be prevented by controlling the temperature and current density.
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