Developing sustainable and efficient bifunctional catalysts for oxygen reduction (ORR) and evolution (OER) reactions is challenging for energy conversion and storage. This work proposes a hierarchical carbon matrix decorated with nitrogen atoms (NC) as a support for obtaining high-performance electrocatalysts based on iron and nickel (Fe/Ni@N-C). The effect of different Fe:Ni ratios and the pyrolysis conditions on the catalyst performance were investigated by combining electrochemical tests, N-2-adsorption-desorption, X-ray diffraction, Transmission Electron Microscopy, and X-ray photoelectron spectroscopy. Once optimized the pyrolysis conditions and the Fe:Ni ratio, the Fe/Ni@N-C catalyst showed high bifunctional OER/ORR activity in a three-electrode cell in an alkaline environment (KOH 1 M), with an overall Delta E for the ORR-OER reaction of 0.75 V. Fe/Ni@N-C was assembled in a rechargeable zinc-air battery, resulting in an excellent electrochemical performance in terms of power density (148.5 mWcm(-2)) and durability, outperforming the benchmark Pt/C-RuO2.

Hierarchical porous Fe/Ni-based bifunctional oxygen electrocatalysts for rechargeable zinc-air batteries / Ricciardi, Beatrice; da Silva Freitas, Williane; Mecheri, Barbara; Nisa, Khair Un; Montero, Jorge; Ficca, Valerio C. A.; Placidi, Ernesto; Alegre, Cinthia; D'Epifanio, Alessandra. - In: CARBON. - ISSN 0008-6223. - 219:(2024), pp. 1-12. [10.1016/j.carbon.2023.118781]

Hierarchical porous Fe/Ni-based bifunctional oxygen electrocatalysts for rechargeable zinc-air batteries

Montero, Jorge
Membro del Collaboration Group
;
Ficca, Valerio C. A.
Membro del Collaboration Group
;
Placidi, Ernesto
Funding Acquisition
;
2024

Abstract

Developing sustainable and efficient bifunctional catalysts for oxygen reduction (ORR) and evolution (OER) reactions is challenging for energy conversion and storage. This work proposes a hierarchical carbon matrix decorated with nitrogen atoms (NC) as a support for obtaining high-performance electrocatalysts based on iron and nickel (Fe/Ni@N-C). The effect of different Fe:Ni ratios and the pyrolysis conditions on the catalyst performance were investigated by combining electrochemical tests, N-2-adsorption-desorption, X-ray diffraction, Transmission Electron Microscopy, and X-ray photoelectron spectroscopy. Once optimized the pyrolysis conditions and the Fe:Ni ratio, the Fe/Ni@N-C catalyst showed high bifunctional OER/ORR activity in a three-electrode cell in an alkaline environment (KOH 1 M), with an overall Delta E for the ORR-OER reaction of 0.75 V. Fe/Ni@N-C was assembled in a rechargeable zinc-air battery, resulting in an excellent electrochemical performance in terms of power density (148.5 mWcm(-2)) and durability, outperforming the benchmark Pt/C-RuO2.
2024
platinum-group-metal-free electrocatalysts; oxygen reduction reaction; oxygen evolution reaction; bifunctional catalyst; Fe/Ni-based catalyst; zinc-air batteries
01 Pubblicazione su rivista::01a Articolo in rivista
Hierarchical porous Fe/Ni-based bifunctional oxygen electrocatalysts for rechargeable zinc-air batteries / Ricciardi, Beatrice; da Silva Freitas, Williane; Mecheri, Barbara; Nisa, Khair Un; Montero, Jorge; Ficca, Valerio C. A.; Placidi, Ernesto; Alegre, Cinthia; D'Epifanio, Alessandra. - In: CARBON. - ISSN 0008-6223. - 219:(2024), pp. 1-12. [10.1016/j.carbon.2023.118781]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1702614
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