International Journal of Hydrogen Energy, Vol.23, No.4, 253-257, 1998
Electrocatalytic properties of Ti2Ni/Ni-Mo composite electrodes for hydrogen evolution reaction
A composite electrode as hydrogen cathodes composed of Ti,Ni hydrogen absorbing alloys and a Ni-Mo electrocatalyst was prepared for alkaline water electrolysis. The electrocatalytic properties of hydrogen evolution reaction (HER) are carried out in a 30 wt% KOH solution at 70 degrees C. The surface morphology and chemical composition of the cathode were also examined. The experimental results show that the composite cathode has a low hydrogen overpotential (ca. 60 mV at 70 degrees C in 30 wt% KOH) and excellent stability under conditions of continuous electrolysis and intermittent electrolysis with power interruption shutdown. The stability mechanism of the cathode against intermittent electrolysis is discussed.
Keywords:ALKALINE WATER ELECTROLYSIS;NI-AL ELECTRODES;POWDERELECTRODES;NICKEL-MOLYBDENUM;ALLOY ELECTRODES;COATEDELECTRODE;KINETICS;CATHODES;MO;COATINGS