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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202000966
|2 doi
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|a pubmed24n1024.xml
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|a (DE-627)NLM307255336
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|a (NLM)32134518
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Wang, Xin
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Edge-Rich Fe-N4 Active Sites in Defective Carbon for Oxygen Reduction Catalysis
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|c 2020
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| 336 |
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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
|b cr
|2 rdacarrier
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|a Date Revised 30.09.2020
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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 Controllably constructing nitrogen-modified divacancies (ND) in carbon substrates to immobilize atomic Fe species and unveiling the advantageous configuration is still challenging, but indispensable for attaining optimal Fe-N-C catalysts for the oxygen reduction reaction (ORR). Herein, a fundamental investigation of unfolding intrinsically superior edge-ND trapped atomic Fe motifs (e-ND-Fe) relative to an intact center model (c-ND-Fe) in ORR electrocatalysis is reported. Density functional theory calculations reveal that local electronic redistribution and bandgap shrinkage for e-ND-Fe endow it with a lower free-energy barrier toward direct four-electron ORR. Inspired by this, a series of atomic Fe catalysts with adjustable ND-Fe coordination are synthesized, which verify that ORR performance highly depends on the concentration of e-ND-Fe species. Remarkably, the best e-ND-Fe catalyst delivers a favorable kinetic current density and halfwave potential that can be comparable to benchmark Pt-C under acidic conditions. This work will guide to develop highly active atomic metal catalysts through rational defect engineering
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|a Journal Article
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|a FeN4
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|a active sites
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|a fuel cells
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|a oxygen reduction reaction
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| 700 |
1 |
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|a Jia, Yi
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Mao, Xin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Liu, Daobin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a He, Wenxiang
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Jia
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Liu, Jianguo
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yan, Xuecheng
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Chen, Jun
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Song, Li
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Du, Aijun
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yao, Xiangdong
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 32(2020), 16 vom: 15. Apr., Seite e2000966
|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:16
|g day:15
|g month:04
|g pages:e2000966
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|u http://dx.doi.org/10.1002/adma.202000966
|3 Volltext
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