Abstract

Copper-based quaternary chalcogenide materials attracted more attention due to their potential application towards the production of sustainable energy through electrocatalysis. Earth rich, low cost, and non-carcinogenic Cu2CoSnS4 (CCTS) electrodes were synthesized using a non-vacuum, one-step direct solution deposition method for hydrogen evolution reaction (HER) in 0.5 M H2SO4. The physical characterization of CCTS was performed using X-ray diffraction (XRD), Fourier transmission infrared spectrophotometer (FTIR), and Scanning electron microscopy (SEM). The electrocatalytic measurements of CCTS electrodes were recorded with an electrochemical workstation. The results show a low overpotential -125.7 mV vs RHE at -10 mA/cm2 and a low Tafel slope of 115.7 mV/dec in 0.5 M H2SO4. The stability of CCTS electrodes was also measured for ∼18 hr reveals CCTS electrodes as a promising material for hydrogen evolution from water splitting.

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