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231225s2018 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201803220
|2 doi
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|a pubmed24n0963.xml
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|a (DE-627)NLM288964225
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|a (NLM)30260517
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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 |
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|a Li, Zilan
|e verfasserin
|4 aut
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|a The Marriage of the FeN4 Moiety and MXene Boosts Oxygen Reduction Catalysis
|b Fe 3d Electron Delocalization Matters
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|c 2018
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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 Completed 29.10.2018
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|a Date Revised 01.10.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a Iron-nitrogen-carbon (Fe-N-C) is hitherto considered as one of the most satisfactory alternatives to platinum for the oxygen reduction reaction (ORR). Major efforts currently are devoted to the identification and maximization of carbon-enclosed FeN4 moieties, which act as catalytically active centers. However, fine-tuning of their intrinsic ORR activity remains a huge challenge. Herein, a twofold activity improvement of pristine Fe-N-C through introducing Ti3 C2 Tx MXene as a support is realized. A series of spectroscopy and magnetic measurements reveal that the marriage of FeN4 moiety and MXene can induce remarkable Fe 3d electron delocalization and spin-state transition of Fe(II) ions. The lower local electron density and higher spin state of the Fe(II) centers greatly favor the Fe d z 2 electron transfer, and lead to an easier oxygen adsorption and reduction on active FeN4 sites, and thus an enhanced ORR activity. The optimized catalyst shows a two- and fivefold higher specific ORR activity than those of pristine catalyst and Pt/C, respectively, even exceeding most Fe-N-C catalysts ever reported. This work opens up a new pathway in the rational design of Fe-N-C catalysts, and reflects the critical influence of Fe 3d electron states in FeN4 moiety supported on MXene in ORR catalysis
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|a Journal Article
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|a MXenes
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|a electron delocalization
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|a iron-nitrogen-carbon
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|a oxygen reduction reaction
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|a support effect
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|a Zhuang, Zechao
|e verfasserin
|4 aut
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|a Lv, Fan
|e verfasserin
|4 aut
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|a Zhu, Han
|e verfasserin
|4 aut
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| 700 |
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|a Zhou, Liang
|e verfasserin
|4 aut
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| 700 |
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|a Luo, Mingchuan
|e verfasserin
|4 aut
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| 700 |
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|a Zhu, Jiexin
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lang, Zhiquan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Feng, Shihao
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Chen, Wei
|e verfasserin
|4 aut
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1 |
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|a Mai, Liqiang
|e verfasserin
|4 aut
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|a Guo, Shaojun
|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 30(2018), 43 vom: 05. Okt., Seite e1803220
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:30
|g year:2018
|g number:43
|g day:05
|g month:10
|g pages:e1803220
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|u http://dx.doi.org/10.1002/adma.201803220
|3 Volltext
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