A carboxylate linker strategy mediated densely accessible Fe-N4 sites for enhancing oxygen electroreduction in Zn-air batteries
Copyright © 2024 Elsevier Inc. All rights reserved..
Iron-nitrogen-carbon single-atom catalysts derived from zeolitic-imidazolate-framework-8 (ZIF-8) have presented its great potential for the oxygen reduction reaction (ORR) in Zn-air batteries (ZABs). However, due to insufficient active Fe-N sites, its ORR activity is inferior to Pt-based catalysts. Herein, a carboxylate (OAc) linker strategy is proposed to design a ZIF-8-derived FeNCOAc catalyst with abundant accessible Fe-N4 single-atom sites. Except that imidazole groups can coordinate with Fe ions, the OAc linker on the unsaturated coordination Zn nodes can anchor and coordinate with more Fe ions, resulting in a significant increase in Fe-N4 site density. Meanwhile, the corrosion of carbon skeleton by OAc oxidation during heat-treatment leads to improved porosity of catalyst. Benefitting from the highly dense Fe-N4 sites and hierarchical pores, the FeNCOAc endows superior performance in alkaline medium (E1/2 = 0.906 V), which is confirmed by density functional theory calculation results. Meanwhile, the assembled liquid ZAB delivers a favorable peak power density of 173.9 mW cm-2, and a high specific capacity of 770.9 mAh g-1 as well as outstanding durability. Besides, the solid-state ZAB also shows outstanding discharge performance.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:665 |
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| Enthalten in: |
Journal of colloid and interface science - 665(2024) vom: 11. Apr., Seite 879-887 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Wang, Dan [VerfasserIn] |
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| Links: |
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| Themen: |
Accessible Fe-N(4) sites |
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| Anmerkungen: |
Date Revised 16.04.2024 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1016/j.jcis.2024.03.188 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM370543904 |
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| 245 | 1 | 2 | |a A carboxylate linker strategy mediated densely accessible Fe-N4 sites for enhancing oxygen electroreduction in Zn-air batteries |
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| 500 | |a Date Revised 16.04.2024 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a Copyright © 2024 Elsevier Inc. All rights reserved. | ||
| 520 | |a Iron-nitrogen-carbon single-atom catalysts derived from zeolitic-imidazolate-framework-8 (ZIF-8) have presented its great potential for the oxygen reduction reaction (ORR) in Zn-air batteries (ZABs). However, due to insufficient active Fe-N sites, its ORR activity is inferior to Pt-based catalysts. Herein, a carboxylate (OAc) linker strategy is proposed to design a ZIF-8-derived FeNCOAc catalyst with abundant accessible Fe-N4 single-atom sites. Except that imidazole groups can coordinate with Fe ions, the OAc linker on the unsaturated coordination Zn nodes can anchor and coordinate with more Fe ions, resulting in a significant increase in Fe-N4 site density. Meanwhile, the corrosion of carbon skeleton by OAc oxidation during heat-treatment leads to improved porosity of catalyst. Benefitting from the highly dense Fe-N4 sites and hierarchical pores, the FeNCOAc endows superior performance in alkaline medium (E1/2 = 0.906 V), which is confirmed by density functional theory calculation results. Meanwhile, the assembled liquid ZAB delivers a favorable peak power density of 173.9 mW cm-2, and a high specific capacity of 770.9 mAh g-1 as well as outstanding durability. Besides, the solid-state ZAB also shows outstanding discharge performance | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Accessible Fe-N(4) sites | |
| 650 | 4 | |a Oxygen reduction reaction | |
| 650 | 4 | |a Single-atom catalysts | |
| 650 | 4 | |a Zn-air battery | |
| 700 | 1 | |a Zha, Sujuan |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Yaqiang |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Xiaosong |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Jibiao |e verfasserin |4 aut | |
| 700 | 1 | |a Chu, Yuan |e verfasserin |4 aut | |
| 700 | 1 | |a Mitsuzaki, Naotoshi |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Zhidong |e verfasserin |4 aut | |
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| 773 | 1 | 8 | |g volume:665 |g year:2024 |g day:11 |g month:04 |g pages:879-887 |
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