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• W2962177436 endingPage "27750" @default.
• W2962177436 startingPage "27743" @default.
• W2962177436 abstract "Developing noble metal-free electrocatalysts toward hydrogen evolution reaction (HER) that can work well at ultrahigh current density are crucial components in renewable energy technologies. Herein, we have reported a strongly coupled 3D hybrid electrocatalyst, which consists of N-doped MoO2 with Ni3S2 grown on Ni foam (N-MoO2/Ni3S2 NF) through an annealing treatment, followed by a thermal ammonia reaction. This N-MoO2/Ni3S2 with a particle size of ∼50 nm was evenly grown on the Ni substrate in this 3D hybrid system. Benefiting from the strong coupling effect, the N-MoO2/Ni3S2 NF exhibited a high HER performance in basic media, with a small value of the Tafel slope (76 mV dec-1) and a low potential of 517 mV at 1000 mA cm-2, which was superior to that of Pt/C (631 mV at 1000 mA cm-2). Experimental results revealed that constructing a coupling interface between N-MoO2 and Ni3S2 facilitated the absorption and dissociation of water molecules, consequently boosting the HER activity. Additionally, the 3D N-MoO2/Ni3S2 NF hybrid could act as a bifunctional electrode for both anode (biomass upgrading) and cathode (HER), which only required a lower potential of 2.08 V at 100 mA cm-2 as compared to the overall water splitting (2.25 V) and achieved a high biomass conversion ratio of over 90%. Moreover, substituting oxygen evolution reaction by urea oxidation reaction also can assist energy-saving hydrogen evolution for 3D N-MoO2/Ni3S2 NF." @default.
• W2962177436 created "2019-07-23" @default.
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• W2962177436 date "2019-07-15" @default.
• W2962177436 modified "2023-10-18" @default.
• W2962177436 title "Strongly Coupled 3D N-Doped MoO₂/Ni₃S₂ Hybrid for High Current Density Hydrogen Evolution Electrocatalysis and Biomass Upgrading" @default.
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• W2962177436 doi "https://doi.org/10.1021/acsami.9b06502" @default.
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