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231225s2018 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201804504
|2 doi
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|a pubmed24n0964.xml
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|a (DE-627)NLM289379717
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|a (NLM)30302828
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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 Qiao, Yueyang
|e verfasserin
|4 aut
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|a Sulfuration of an Fe-N-C Catalyst Containing Fex C/Fe Species to Enhance the Catalysis of Oxygen Reduction in Acidic Media and for Use in Flexible Zn-Air Batteries
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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 13.11.2018
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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 © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a During the preparation of atomically dispersed Fe-N-C catalysts, it is difficult to avoid the formation of iron-carbide-containing iron clusters ("Fex C/Fe"), along with the desired carbon matrix containing dispersed FeNx sites. As a result, an uncertain amount of the oxygen reduction reaction (ORR) occurs, making it difficult to maximize the catalytic efficiency. Herein, sulfuration is used to boost the activity of Fex C/Fe, forming an improved system, "FeNC-S-Fex C/Fe", for catalysis involving oxygen. Various spectroscopic techniques are used to define the composition of the active sites, which include Fe-S bonds at the interface of the now-S-doped carbon matrix and the Fex C/Fe clusters. In addition to outstanding activity in basic media, FeNC-S-Fex C/Fe exhibits improved ORR activity and durability in acidic media; its half-wave potential of 0.821 V outperforms the commercial Pt/C catalyst (20%), and its activity does not decay even after 10 000 cycles. Interestingly, the catalytic activity for the oxygen evolution reaction (OER) simultaneously improves. Thus, FeNC-S-Fex C/Fe can be used as a high-performance bifunctional catalyst in Zn-air batteries. Theoretical calculations and control experiments show that the original FeNx active centers are enhanced by the Fex C/Fe clusters and the Fe-S and C-S-C bonds
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|a Journal Article
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|a catalysis
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|a flexible materials
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|a iron-carbon species
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|a zinc-air batteries
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|a Yuan, Pengfei
|e verfasserin
|4 aut
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|a Hu, Yongfeng
|e verfasserin
|4 aut
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|a Zhang, Jianan
|e verfasserin
|4 aut
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|a Mu, Shichun
|e verfasserin
|4 aut
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| 700 |
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|a Zhou, Jihang
|e verfasserin
|4 aut
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| 700 |
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|a Li, Hao
|e verfasserin
|4 aut
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| 700 |
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|a Xia, Huicong
|e verfasserin
|4 aut
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| 700 |
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|a He, Jing
|e verfasserin
|4 aut
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| 700 |
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|a Xu, Qun
|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 30(2018), 46 vom: 15. Nov., Seite e1804504
|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:46
|g day:15
|g month:11
|g pages:e1804504
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|u http://dx.doi.org/10.1002/adma.201804504
|3 Volltext
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