Abstract
Developing an active, stable, and inexpensive electrocatalyst for both hydrogen and oxygen evolution reactions (HER and OER) which operates in the same electrolyte for overall water splitting is momentous for renewable energy conversion processes. Herein, we report the use of NiCoO2-carbon composite as an efficient electrocatalyst for the fabrication of both cathode and anode electrodes to drive overall water splitting in alkaline media. The proposed NiCoO2-carbon composite exhibited excellent electrocatalytic activity and outstanding long-term stability in 1.0 M KOH. The onset overpotentials for about 28 and 273 mV were observed for HER and OER, respectively. Also, a current density of 10 mA cm−2 was delivered at a low HER and OER overpotentials for about 51 and 295 mV, respectively.
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