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Facile Fabrication of Ni S /Ag S Intertwined Structures for Oxygen and Hydrogen Evolution Reactions. | LitMetric
Here, we report the fabrication of the unique intertwined Ni S /Ag S composite structure with hexagonal shape from their molecular precursors by one-pot thermal decomposition. Various spectroscopic and microscopic techniques were utilized to confirm the Ni S /Ag S intertwined structure. Powder X-ray Powder Diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis suggest that there is an enrichment of Ni S phase in Ni S /Ag S. The presence of Ag S in Ni S /Ag S improves the conductivity by reducing the interfacial energy and charge transfer resistance. When Ni S /Ag S is employed as an electrocatalyst for electrochemical oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) activity, it requires a low overpotential of 152 mV for HER and 277 mV for OER to obtain the geometrical current density of 10 mA cm , which is definitely superior to that of its components Ni S and Ag S. This work provides a simple design route to develop an efficient and durable electrocatalyst with outstanding OER and HER performance and the present catalyst (Ni S /Ag S) deserves as a potential candidate in the field of energy conversion systems.
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