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• W3197103749 endingPage "132174" @default.
• W3197103749 startingPage "132174" @default.
• W3197103749 abstract "• S, N co-doped carbon-based oxygen catalyst was fabricated. • Carbon nanotubes are coupled with CoFe nanoparticles. • The catalyst exhibits excellent ORR and OER catalytic activity. • The catalytic activity is boosted by the co-doping of S, N and CoFe alloy. • Zn-air battery with the catalyst shows excellent rechargeability and durability. The development of efficient and cost-effective bifunctional electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is crucial for the commercialization of rechargeable metal-air batteries. Herein, the pyrolysis of a precursor containing g-C 3 N 4 , thiourea, cobalt chloride and ferric chloride was used to fabricate S, N co-doped carbon nanotubes functionalized with Co 3 Fe 7 alloy nanoparticles (CoFe/S-N-C). The obtained CoFe/S-N-C catalyst exhibited an ORR half wave potential of 0.855 V ( vs . RHE) in 0.1 M KOH, outperforming a commercial Pt/C catalyst ( E 1/2 = 0.844 V). The catalyst also demonstrated superior OER catalytic activity (1.588 V at 10 mA cm −2 ) relative to RuO 2 in 0.1 M KOH, thus displaying outstanding bifunctional ORR and OER activity. A rechargeable Zn-air battery fabricated using CoFe/S-N-C shows good very performance (maximum power density of 120 mW cm −2 with a specific capacity of 814 mAh g −1 ) which was superior to a Zn-air battery fabricated using Pt/C and RuO 2 as ORR and OER catalysts (92 mW cm −2 and 787 mAh g −1 , respectively). Further, the fabricated battery using CoFe/S-N-C showed good stability, offering a discharge voltage ∼ 1.10 V and a recharge voltage ∼ 2.15 V at 10 mA cm −2 over 300 cycles, evidence of the durability of the CoFe/S-N-C catalyst." @default.
• W3197103749 created "2021-09-13" @default.
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• W3197103749 date "2022-02-01" @default.
• W3197103749 modified "2023-10-17" @default.
• W3197103749 title "S, N co-doped carbon nanotubes coupled with CoFe nanoparticles as an efficient bifunctional ORR/OER electrocatalyst for rechargeable Zn-air batteries" @default.
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• W3197103749 doi "https://doi.org/10.1016/j.cej.2021.132174" @default.
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