jaue2021-084: Hierarchical Ni-Co nitride nanosheets as a highly efficient and stable electrocatalyst for hydrogen evolution

Abstract

Hydrogen, generated by electrocatalytic process, is one of the most promising sources of green and sustainable
energy. Herein, we prepared a three-dimensional Ni-Co nitride nanosheet catalyst via electrodeposition process
uniformly supported on carbon cloth (CC), which serves as an eminently active and durable hydrogen evolution
reaction (HER) catalyst for alkaline water electrolysis. The effect of the electrodeposition time on the performance
of the NiCoN(15)/CC catalyst was investigated, and it was demonstrated that the optimized NiCoN(15)/CC
catalyst displays an excellent catalytic performance and stability. The electrodes can have very low overpotential
of 72 mV for HER in 1.0 M KOH at a low current density of 10 mA cm-2. The high electrocatalytic activity of
NiCoN(15)/CC is attributed to the excellent morphology and exposed active crystal plane.