Mg87Al3Pd10 and Ni60Nb 20Zr20 amorphous alloys have been prepared by the single-roller melt-spinning technique. We have examined the change in the electrical resistance of the amorphous alloys before and after electrochemical hydrogen charging and discharging in 6N KOH solution at the charging/discharging potentials obtained from cyclic voltammetry measurements. The electrical resistance of both amorphous alloys increases after hydrogen charging. The electrical resistance of the Mg87Al3Pd10 amorphous alloy decreases to the initial level after hydrogen discharging, while that of the Ni60Nb20Zr20 amorphous alloy shows an extremely small decrease. A 100% resistance decrease has been observed repeatedly in the Mg87Al3Pd10 amorphous alloy after hydrogen discharging when the hydrogen charging and discharging cycle was repeated 5 times in the KOH solution. This suggests that the Mg 87Al3Pd10 amorphous alloy can absorb and release hydrogen repeatedly and, apparently also shows good reversibility in the electrical resistance.
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