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Tailoring the d-band center by intermetallic charge-transfer manipulation in bimetal alloy nanoparticle confined in N-doped carbon nanobox for efficient rechargeable Zn-air battery
School of Materials Science and Engineering, State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Anhui, Huainan, China.
National Engineering Research Center for Marine Aquaculture, Marine Science and Technology College, Zhejiang Ocean University, Zhejiang, Zhoushan, China.
School of Materials Science and Engineering, State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Anhui, Huainan, China.
School of Materials Science and Engineering, State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Anhui, Huainan, China.
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2023 (Engelska)Ingår i: Chemical Engineering Journal, ISSN 1385-8947, E-ISSN 1873-3212, Vol. 463, artikel-id 142411Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

In this effort, the electronic-structure modulation strategy through nano-alloying was rationally designed to fabricate Fe-Ni alloy particles embedded in an N-doped carbon nanobox. The as-developed catalyst outperformed the commercialized noble-metal benchmarks with a decent half-wave potential of 0.891 V for ORR and a small overpotential of 325 mV at 10 mA/cm2 for OER both in 0.1 M KOH solution. Beyond that, a highly-efficient regenerative Zn-air battery was also successfully constructed, evidenced by a small potential gap of 0.664 V (between Ej=10 and E1/2), a high specific capacity of 763 mAh/g, a large peak power density of 270 mW/cm2, and robust stability. Ultraviolet photoelectron spectroscopy and theoretical simulation confirmed that the alloying of Ni into Fe could well manipulate the electronic structure, leading to favorable intermetallic charge-transfer and then downshifting the d-band center of Fe adsorption sites, all of which help to significantly lower the reaction barriers of the involved intermediates during the electrocatalytic ORR/OER processes.

Ort, förlag, år, upplaga, sidor
Elsevier, 2023. Vol. 463, artikel-id 142411
Nyckelord [en]
Bi-functional oxygen electrode, Charge-transfer, Ni-Fe alloy, Nitrogen-doped carbon, Zn-air battery
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URN: urn:nbn:se:umu:diva-206014DOI: 10.1016/j.cej.2023.142411ISI: 000957271100001Scopus ID: 2-s2.0-85150292997OAI: oai:DiVA.org:umu-206014DiVA, id: diva2:1746398
Tillgänglig från: 2023-03-28 Skapad: 2023-03-28 Senast uppdaterad: 2023-09-05Bibliografiskt granskad

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