Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 10, Issue 1, Pages 279-287Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.1c06178
Keywords
P doping; NiSe2; MoSe2; Hydrogen evolution; Density functional theory
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Funding
- Fundamental Research Funds for the Central Universities [3072021CFT1001]
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The P-doped bimetallic NiSe2-MoSe2(1-1)@CC catalyst shows good hydrogen evolution reaction (HER) activity in both acidic and alkaline solutions, with small overpotential and Tafel slope.
Developing earth-abundant electrocatalysts with high activity and good durability for hydrogen evolution reaction (HER) in both acidic and alkaline media toward alkaline conditions is crucial for achieving a sustainable hydrogen energy economy. Herein, we develop P-doped bimetallic NiSe2-MoSe2 with optimum Ni/Mo proportions (1-1) grown on carbon cloth (P-NiSe2/MoSe2(1-1)@CC) by a facile, low-cost hydrothermal ion exchange reaction (P replaces partial Se ion). Remarkably, the free-standing P-NiSe2/MoSe2(1-1)@CC catalyst exhibits good HER activity with the overpotential of 93/175 mV at 10 mA cm(-2) and a small Tafel slope of 52/78 mV dec(-1) in acidic/alkaline solution. Density functional theory (DFT) calculations prove the P-NiSe2/MoSe2(1-1)-Ni has a small vertical bar Delta G(H)*vertical bar value of 0.17 eV, and the density of electronic states is enhanced around the Fermi level. The experimental and theoretical results reveal P doping has a positive contribution for the better HER activity of P-NiSe2/MoSe2(1-1)@CC.
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