Phosphorus-doping induced electronic modulation of CoS2–MoS2 hollow spheres on MoO2 film-Mo foil for synergistically boosting alkaline hydrogen evolution reaction |
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Affiliation: | State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China |
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Abstract: | Combination of anionic doping and multicomponent synergism are effective approach to improve the performance of electrocatalysts toward hydrogen evolution reaction (HER) process. Herein, P-doped CoS2–MoS2 hollow spheres assembled by countless sheets on oxidized Mo foil (P–CoS2/MoS2/MoO2) was synthesized by hydrothermal and phosphorization process. The unique hollow structure with countless sheets as wall endows more accessible active sites, fast electron/mass transport and high conductivity. P-doping could redistribute the local charge density and optimize the surface charge state to improve the intrinsic activity and accelerate reaction kinetics. The optimized P–CoS2/MoS2/MoO2 exhibits an outstanding HER performance with an overpotential of 85 mV to reach 10 mA cm?2, a small Tafel slope of 84.6 mV dec?1, superior intrinsic HER activity and robust durability under alkaline solution. This work proposed a feasible strategy to build the hollow, heterostructured and binder-free electrode in renewable energy application. |
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Keywords: | Hollow spheres Electronic modulation Hydrogen evolution reaction |
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