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- W4293438382 abstract "Synthesis conditions are among the most influential factors in the electrocatalytic properties of the samples studied for the hydrogen evolution reaction (HER). In this study, conditions of NiSe synthesis over a Mo–Ni–Se layer were optimized to create core-shell nanostructures with excellent electrocatalytic properties. To optimize the synthesis conditions, first, two electrodeposition techniques in constant potential and pulse potential conditions were investigated and then the optimal temperature for electrodeposition between 5, 25, 40, and 60 °C was found. The electrocatalytic activity of the synthesized samples was investigated using linear sweep voltammetry (LSV), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and chronopotentiometry tests in a 1 M KOH solution. Preliminary results showed that pulsed electrodeposition of NiSe could improve the electrocatalytic activity of Mo–Ni–Se by forming durable and suitable nanostructures, while electrodeposited NiSe at constant potential could reduce the electrocatalytic activity of the electrode by forming a dense structure. Then, to determine the appropriate temperature, electrodeposition at the optimal pulse potential at four temperatures of 5, 25, 40, and 60 °C was used to synthesize NiSe on Mo–Ni–Se. The final results showed that the sample synthesized at 60 °C with an electrochemically active surface area of 2870 cm2 had the highest hydrogen production sites and required only an overpotential of 77 mV to achieve a current density of 10 mA cm−2." @default.
- W4293438382 created "2022-08-29" @default.
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- W4293438382 date "2022-09-01" @default.
- W4293438382 modified "2023-09-28" @default.
- W4293438382 title "Synthesis and optimization of Mo–Ni–Se@NiSe core-shell nanostructures as efficient and durable electrocatalyst for hydrogen evolution reaction in alkaline media" @default.
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- W4293438382 doi "https://doi.org/10.1016/j.ijhydene.2022.08.025" @default.
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