Abstract
In this paper, we report the use of Zn0.76Co0.24S/CoS2 nanowires array on Ti mesh (Zn-Co-S/TM) topotactically derived from ZnCo2O4 nanowires array precursor as a durable and efficient bifunctional hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) catalyst in strongly alkaline media. This Zn-Co-S/TM electrode drives 20mA cm−2 at 238mV HER overpotential and 20mA cm−2 at 330mV OER overpotential. The corresponding two-electrode alkaline water-splitting system achieves 10mA cm−2 at a cell voltage of 1.66V.
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