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231225s2019 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201805126
|2 doi
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|a pubmed24n0977.xml
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|a (DE-627)NLM293334021
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|a (NLM)30706548
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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, Xiao Xia
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Iron-Free Cathode Catalysts for Proton-Exchange-Membrane Fuel Cells
|b Cobalt Catalysts and the Peroxide Mitigation Approach
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|c 2019
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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 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 © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a High-performance and inexpensive platinum-group-metal (PGM)-free catalysts for the oxygen reduction reaction (ORR) in challenging acidic media are crucial for proton-exchange-membrane fuel cells (PEMFCs). Catalysts based on Fe and N codoped carbon (Fe-N-C) have demonstrated promising activity and stability. However, a serious concern is the Fenton reactions between Fe2+ and H2 O2 generating active free radicals, which likely cause degradation of the catalysts, organic ionomers within electrodes, and polymer membranes used in PEMFCs. Alternatively, Co-N-C catalysts with mitigated Fenton reactions have been explored as a promising replacement for Fe and PGM catalysts. Therefore, herein, the focus is on Co-N-C catalysts for the ORR relevant to PEMFC applications. Catalyst synthesis, structure/morphology, activity and stability improvement, and reaction mechanisms are discussed in detail. Combining experimental and theoretical understanding, the aim is to elucidate the structure-property correlations and provide guidance for rational design of advanced Co catalysts with a special emphasis on atomically dispersed single-metal-site catalysts. In the meantime, to reduce H2 O2 generation during the ORR on the Co catalysts, potential strategies are outlined to minimize the detrimental effect on fuel cell durability
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4 |
|a Journal Article
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| 650 |
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4 |
|a Review
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4 |
|a Co catalysts
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4 |
|a H2O2 mitigation
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| 650 |
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4 |
|a PGM-free catalysts
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| 650 |
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4 |
|a fuel cells
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| 650 |
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4 |
|a oxygen reduction
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| 700 |
1 |
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|a Prabhakaran, Venkateshkumar
|e verfasserin
|4 aut
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| 700 |
1 |
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|a He, Yanghua
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Shao, Yuyan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Wu, Gang
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 31(2019), 31 vom: 11. Aug., Seite e1805126
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
1 |
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|g volume:31
|g year:2019
|g number:31
|g day:11
|g month:08
|g pages:e1805126
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| 856 |
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|u http://dx.doi.org/10.1002/adma.201805126
|3 Volltext
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