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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202003134
|2 doi
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|a pubmed24n1038.xml
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|a (DE-627)NLM311456790
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|a (NLM)32567055
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Chen, Jiangyue
|e verfasserin
|4 aut
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|a Dual Single-Atomic Ni-N4 and Fe-N4 Sites Constructing Janus Hollow Graphene for Selective Oxygen Electrocatalysis
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|c 2020
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 16.11.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a Nitrogen-coordinated metal single atoms in carbon have aroused extensive interest recently and have been growing as an active research frontier in a wide range of key renewable energy reactions and devices. Herein, a step-by-step self-assembly strategy is developed to allocate nickel (Ni) and iron (Fe) single atoms respectively on the inner and outer walls of graphene hollow nanospheres (GHSs), realizing separate-sided different single-atom functionalization of hollow graphene. The Ni or Fe single atom is demonstrated to be coordinated with four N atoms via the formation of a Ni-N4 or Fe-N4 planar configuration. The developed Ni-N4 /GHSs/Fe-N4 Janus material exhibits excellent bifunctional electrocatalytic performance, in which the outer Fe-N4 clusters dominantly contribute to high activity toward the oxygen reduction reaction (ORR), while the inner Ni-N4 clusters are responsible for excellent activity toward the oxygen evolution reaction (OER). Density functional theory calculations demonstrate the structures and reactivities of Fe-N4 and Ni-N4 for the ORR and OER. The Ni-N4 /GHSs/Fe-N4 endows a rechargeable Zn-air battery with excellent energy efficiency and cycling stability as an air-cathode, outperforming that of the benchmark Pt/C+RuO2 air-cathode. The current work paves a new avenue for precise control of single-atom sites on carbon surface for the high-performance and selective electrocatalysts
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|a Journal Article
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|a Janus catalysts
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|a Zn-air batteries
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|a bifunctional electrocatalysis
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|a single atoms
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|a Li, Hao
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Fan, Chuang
|e verfasserin
|4 aut
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|a Meng, Qingwei
|e verfasserin
|4 aut
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|a Tang, Yawen
|e verfasserin
|4 aut
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|a Qiu, Xiaoyu
|e verfasserin
|4 aut
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|a Fu, Gengtao
|e verfasserin
|4 aut
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| 700 |
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|a Ma, Tianyi
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 32(2020), 30 vom: 22. Juli, Seite e2003134
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:32
|g year:2020
|g number:30
|g day:22
|g month:07
|g pages:e2003134
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|u http://dx.doi.org/10.1002/adma.202003134
|3 Volltext
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