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• W3213320199 endingPage "139555" @default.
• W3213320199 startingPage "139555" @default.
• W3213320199 abstract "• A bifunctional oxygen electrocatalyst was successfully synthesized. • A homemade rechargeable Zn-air battery was fabricated. • The outstanding bifunctional activity of the electrocatalyst was attributed to the incorporated nico alloy and nitrogen heteroatom. Bifunctional catalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are important for energy conversion systems such as fuel cells, water splitting, and metal-air battery devices. In this work, an earthly abundant and cheap biomass of tobacco-stem was used to prepare a novel porous carbon framework (NiCo@N C) by incorporating transition metal alloy and nitrogen-rich small molecules. The resultant catalyst affords an onset potential of 0.92 V and a half-wave potential of 0.86 V for oxygen reduction reaction in alkaline media, which is better than commercial Pt/C. Besides, the catalyst also exhibits good oxygen evolution reaction performance with a low overpotential of 280 mV @ 10 mA cm −2 , and the potential gap between ORR and OER is only 0.65 V. The incorporation of NiCo alloy and N heteroatom modulates the electronic structure of the prepared carbon frameworks, creates abundant active sites, and improves charge redistribution, thus resulting in faster ORR and OER reaction kinetics. The applicability of the prepared NiCo@N C is fully harnessed for use as an air-cathode in a Zn-air battery. This work creates a platform for developing efficient porous and functionalized biomass-derived oxygen electrocatalysts for energy applications." @default.
• W3213320199 created "2021-11-22" @default.
• W3213320199 creator A5029695887 @default.
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• W3213320199 date "2022-01-01" @default.
• W3213320199 modified "2023-10-18" @default.
• W3213320199 title "CoNi nano-alloy anchored on biomass-derived N-doped carbon frameworks for enhanced oxygen reduction and evolution reactions" @default.
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• W3213320199 doi "https://doi.org/10.1016/j.electacta.2021.139555" @default.
• W3213320199 hasPublicationYear "2022" @default.
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