Abstract
Hydrogen (H2) is a clean and renewable energy source with a vital role to reduce global dependence on fossil fuels. H2 evolution through electrochemical reduction of water is an essential eco-friendly strategy, and cost-effective electrocatalysts are critical for large scale manufacturing. This paper proposes metal (Cu, Fe, and Mn)-doped nanostripes-structured molybdenum selenide (MoSe2) electrocatalysts for the H2 evolution reaction (HER). For the first time, a solution deposition technique was successfully employed to architect the basal plane edges in nanostripes-structured MoSe2 through metal doping for enhanced HER. Cu-doped MoSe2 exhibited ∼86 mV overpotential with a small Tafel slope (∼44 mV/dec) which is greater among the available MoSe2-based catalysts. An outstanding robustness was observed in an acidic medium for constant HER over 20 h. First-principles density function theory (DFT) approximations showed that charge transfer between the doped metal and MoSe2 increased the density of states near...
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