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- W2892698569 abstract "Developing cost-effective and energy-efficient noble-metal-free bifunctional electrocatalysts for clean and renewable energy conversion systems, such as fuel cells and water splitting devices, has been highly desirable nowadays. Herein, we report the successful synthesis of N-, O-, and S-doped carbon-encapsulated Ni3S2 and NiS core–shell architectures (Ni3S2/NiS/NOSCs) by pyrolysis of S- and Ni(II)-containing polypyrrole solid precursors, producing carbon-encapsulated Ni3S2 composites (Ni3S2/NOSCs), followed by the conversion of the Ni3S2 core’s surface into NiS shell with concentrated HCl solution. The materials are proven to serve as bifunctional electrocatalysts for hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR) in alkaline media. Notably, Ni3S2/NiS/NOSC-900, pyrolyzed at 900 °C, exhibits remarkable electrocatalytic performance toward HER with a low overpotential of 180 mV at a current density of 10 mA cm–2, a small Tafel slope of 83 mV dec–1, and a good long-term stability of 15..." @default.
- W2892698569 created "2018-10-05" @default.
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- W2892698569 date "2018-09-26" @default.
- W2892698569 modified "2023-10-17" @default.
- W2892698569 title "Nitrogen-, Oxygen- and Sulfur-Doped Carbon-Encapsulated Ni3S2 and NiS Core–Shell Architectures: Bifunctional Electrocatalysts for Hydrogen Evolution and Oxygen Reduction Reactions" @default.
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- W2892698569 doi "https://doi.org/10.1021/acssuschemeng.8b04029" @default.
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