Enhancing OER Performance with Electrodeposited NiPSe Nanostructures: Synergistic Effects and Kinetic Insights

The rational design of high-performance, economical electrocatalysts for the oxygen evolution reaction (OER) represents a crucial step toward sustainable energy solutions. In this study, a simple electrodeposition technique is employed to fabricate nickel-phosphorus-selenium (NiPSe) nanostructured catalysts designed to enhance OER performance. The optimized NiPSe electrocatalyst displays remarkable catalytic performance, attaining a substantially reduced overpotential of merely ۳۷۱ mV to drive a current density of ۱۰۰ mA cm-۲, coupled with rapid reaction kinetics evidenced by its low Tafel slope of ۵۸.۴ mV dec-۱. These superior electrochemical characteristics highlight the material's efficient charge transfer properties and catalytic effectiveness. Electrochemical impedance spectroscopy (EIS) and electrochemically active surface area (ECSA) assessments further confirm the decrease in charge-transfer resistance and an increased density of active sites, both contributing to superior catalytic behavior. Moreover, the NiPSe electrode demonstrates excellent durability, retaining its performance over a ۲۴-hour continuous operation with minimal degradation. This enhanced performance stems from the cooperative effects between nickel and phosphorus components, combined with the electronic conductivity benefits provided by selenium incorporation. These results highlight a promising and scalable route for engineering robust, earth-abundant electrocatalysts for industrial-scale water splitting technologies.

کلیدواژه ها:

Electrocatalysts ، Oxygen evolution reaction ، Electrodeposition ، Water splitting