Host–Guest Engineering of Dual‐Metal Nitrogen Carbides as Bifunctional Oxygen Electrocatalysts for Long‐Cycle Rechargeable Zn‐Air Battery
ABSTRACT The key to obtaining high intrinsic catalytic activity of Me‐Nx‐C electrocatalysts for Zn‐air batteries is to form high‐density bifunctional Me‐Nx active sites during the pyrolysis of the precursor while maintaining structural stability. In this study, a host–guest spatial confinement strat...
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| Format: | Article |
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Wiley
2025-04-01
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| Series: | Carbon Energy |
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| Online Access: | https://doi.org/10.1002/cey2.682 |
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| author | Yisi Liu Zongxu Li Yonghang Zeng Meifeng Liu Dongbin Xiong Lina Zhou Yue Du Yao Xiao |
| author_facet | Yisi Liu Zongxu Li Yonghang Zeng Meifeng Liu Dongbin Xiong Lina Zhou Yue Du Yao Xiao |
| author_sort | Yisi Liu |
| collection | DOAJ |
| description | ABSTRACT The key to obtaining high intrinsic catalytic activity of Me‐Nx‐C electrocatalysts for Zn‐air batteries is to form high‐density bifunctional Me‐Nx active sites during the pyrolysis of the precursor while maintaining structural stability. In this study, a host–guest spatial confinement strategy was utilized to synthesize a composite catalyst consisting of Co3Fe7 nanoparticles confined in an N‐doped carbon network. The coupling between the host (MIL‐88B) and guest (cobalt porphyrin, CoPP) produces high‐density bimetallic atomic active sites. By controlling the mass of guest molecules, it is possible to construct precursors with the highest activity potential. The Co3Fe7/NC material with a certain amount of the guest displays a better electrocatalytic performance for both oxygen reduction reaction and oxygen evolution reaction with a half‐wave potential (E1/2) of 0.85 V and an overpotential of 1.59 V at 10 mA cm−2, respectively. The specific structure of bimetallic active centers is verified to be FeN2‐CoN4 using experimental characterizations, and the oxygen reaction mechanism is explored by in‐situ characterization techniques and first‐principles calculations. The Zn‐air battery assembled with Co3Fe7/NC cathode exhibits a remarkable open‐circuit voltage of 1.52 V, an exceptional peak power density of 248.1 mW cm−2, and stable cycling stability over 1000 h. Particularly, the corresponding flexible Zn‐air battery affords prominent cycling performance under different bending angles. This study supplies the idea and method of designing catalysts with specific structures at the atomic and electronic scales for breaking through the large‐scale application of electrocatalysts based on oxygen reactions in fuel cells/metal‐air batteries. |
| format | Article |
| id | doaj-art-e948606a0f9e4e79a17faef8de49c3ad |
| institution | OA Journals |
| issn | 2637-9368 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | Carbon Energy |
| spelling | doaj-art-e948606a0f9e4e79a17faef8de49c3ad2025-08-20T02:30:00ZengWileyCarbon Energy2637-93682025-04-0174n/an/a10.1002/cey2.682Host–Guest Engineering of Dual‐Metal Nitrogen Carbides as Bifunctional Oxygen Electrocatalysts for Long‐Cycle Rechargeable Zn‐Air BatteryYisi Liu0Zongxu Li1Yonghang Zeng2Meifeng Liu3Dongbin Xiong4Lina Zhou5Yue Du6Yao Xiao7Hubei Key Laboratory of Photoelectric Materials and Devices, School of Material Science and Engineering Hubei Normal University Huangshi ChinaHubei Key Laboratory of Photoelectric Materials and Devices, School of Material Science and Engineering Hubei Normal University Huangshi ChinaHubei Key Laboratory of Photoelectric Materials and Devices, School of Material Science and Engineering Hubei Normal University Huangshi ChinaHubei Key Laboratory of Photoelectric Materials and Devices, School of Physical and Electronic Science Hubei Normal University Huangshi ChinaHubei Key Laboratory of Photoelectric Materials and Devices, School of Material Science and Engineering Hubei Normal University Huangshi ChinaHubei Key Laboratory of Photoelectric Materials and Devices, School of Material Science and Engineering Hubei Normal University Huangshi ChinaHubei Key Laboratory of Photoelectric Materials and Devices, School of Material Science and Engineering Hubei Normal University Huangshi ChinaCollege of Chemistry and Materials Engineering Wenzhou University Wenzhou ChinaABSTRACT The key to obtaining high intrinsic catalytic activity of Me‐Nx‐C electrocatalysts for Zn‐air batteries is to form high‐density bifunctional Me‐Nx active sites during the pyrolysis of the precursor while maintaining structural stability. In this study, a host–guest spatial confinement strategy was utilized to synthesize a composite catalyst consisting of Co3Fe7 nanoparticles confined in an N‐doped carbon network. The coupling between the host (MIL‐88B) and guest (cobalt porphyrin, CoPP) produces high‐density bimetallic atomic active sites. By controlling the mass of guest molecules, it is possible to construct precursors with the highest activity potential. The Co3Fe7/NC material with a certain amount of the guest displays a better electrocatalytic performance for both oxygen reduction reaction and oxygen evolution reaction with a half‐wave potential (E1/2) of 0.85 V and an overpotential of 1.59 V at 10 mA cm−2, respectively. The specific structure of bimetallic active centers is verified to be FeN2‐CoN4 using experimental characterizations, and the oxygen reaction mechanism is explored by in‐situ characterization techniques and first‐principles calculations. The Zn‐air battery assembled with Co3Fe7/NC cathode exhibits a remarkable open‐circuit voltage of 1.52 V, an exceptional peak power density of 248.1 mW cm−2, and stable cycling stability over 1000 h. Particularly, the corresponding flexible Zn‐air battery affords prominent cycling performance under different bending angles. This study supplies the idea and method of designing catalysts with specific structures at the atomic and electronic scales for breaking through the large‐scale application of electrocatalysts based on oxygen reactions in fuel cells/metal‐air batteries.https://doi.org/10.1002/cey2.682bifunctional electrocatalytic performancebimetal active siteshost−guest engineeringMIL‐88BZn‐air battery |
| spellingShingle | Yisi Liu Zongxu Li Yonghang Zeng Meifeng Liu Dongbin Xiong Lina Zhou Yue Du Yao Xiao Host–Guest Engineering of Dual‐Metal Nitrogen Carbides as Bifunctional Oxygen Electrocatalysts for Long‐Cycle Rechargeable Zn‐Air Battery Carbon Energy bifunctional electrocatalytic performance bimetal active sites host−guest engineering MIL‐88B Zn‐air battery |
| title | Host–Guest Engineering of Dual‐Metal Nitrogen Carbides as Bifunctional Oxygen Electrocatalysts for Long‐Cycle Rechargeable Zn‐Air Battery |
| title_full | Host–Guest Engineering of Dual‐Metal Nitrogen Carbides as Bifunctional Oxygen Electrocatalysts for Long‐Cycle Rechargeable Zn‐Air Battery |
| title_fullStr | Host–Guest Engineering of Dual‐Metal Nitrogen Carbides as Bifunctional Oxygen Electrocatalysts for Long‐Cycle Rechargeable Zn‐Air Battery |
| title_full_unstemmed | Host–Guest Engineering of Dual‐Metal Nitrogen Carbides as Bifunctional Oxygen Electrocatalysts for Long‐Cycle Rechargeable Zn‐Air Battery |
| title_short | Host–Guest Engineering of Dual‐Metal Nitrogen Carbides as Bifunctional Oxygen Electrocatalysts for Long‐Cycle Rechargeable Zn‐Air Battery |
| title_sort | host guest engineering of dual metal nitrogen carbides as bifunctional oxygen electrocatalysts for long cycle rechargeable zn air battery |
| topic | bifunctional electrocatalytic performance bimetal active sites host−guest engineering MIL‐88B Zn‐air battery |
| url | https://doi.org/10.1002/cey2.682 |
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