Bimetallic phosphides-oxides heterostructures coupled heteroatom-doped carbon as bifunctional electrocatalysts for Zn-air batteries
Designing efficient bifunctional catalysts with multi-component composites is essential for the application of zinc-air batteries (ZABs). Herein, a bimetallic phosphides-oxides heterostructures coupled heteroatom-doped carbon (FeCoP-FeCo2O4@PNPC) was designed by in-situ growth of phosphor-oxide hete...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Tsinghua University Press
2025-06-01
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| Series: | Nano Research Energy |
| Subjects: | |
| Online Access: | https://www.sciopen.com/article/10.26599/NRE.2024.9120151 |
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| Summary: | Designing efficient bifunctional catalysts with multi-component composites is essential for the application of zinc-air batteries (ZABs). Herein, a bimetallic phosphides-oxides heterostructures coupled heteroatom-doped carbon (FeCoP-FeCo2O4@PNPC) was designed by in-situ growth of phosphor-oxide heterostructures on heteroatom-doped carbon materials and employed as bifunctional electrocatalyst for ZABs. The heteroatom-doped carbon substrate with ORR active sites can effectively improve the conductivity and the double transition metal atoms can enhance the catalytic activity. The heterostructure adjusts the d-band center, making the material gain and loss of electrons are at a medium level, which is conducive to the material’s capture of raw materials and the release of products. is beneficial to electron transfer. The dense FeCo2O4 nanorods act as a protection layer to improve stability, and the oxide-phosphide heterostructure and synergistic coupling with the heteroatom-doped carbon substrate also contribute to the catalytic activity. The small ΔE of 0.765 V for catalyzing both OER and ORR, high power density of 121.6 mW·cm–2 and the extraordinary long-term stability of more than 240 h for liquid state rechargeable ZAB can be realized. The flexible solid-state rechargeable ZAB with FeCoP-FeCo2O4@PNPC also exhibits superior mechanical flexibility and cycling stability. |
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| ISSN: | 2791-0091 2790-8119 |