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231225s2021 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202007525
|2 doi
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|a pubmed24n1063.xml
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|a DE-627
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|e rakwb
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|a eng
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| 100 |
1 |
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|a Yan, Jianhua
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Direct Magnetic Reinforcement of Electrocatalytic ORR/OER with Electromagnetic Induction of Magnetic Catalysts
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|c 2021
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 02.02.2021
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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 GmbH.
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|a Designing stable and efficient electrocatalysts for both oxygen reduction and evolution reactions (ORR/OER) at low-cost is challenging. Here, a carbon-based bifunctional catalyst of magnetic catalytic nanocages that can direct enhance the oxygen catalytic activity by simply applying a moderate (350 mT) magnetic field is reported. The catalysts, with high porosity of 90% and conductivity of 905 S m-1 , are created by in situ doping metallic cobalt nanodots (≈10 nm) into macroporous carbon nanofibers with a facile electrospinning method. An external magnetic field makes the cobalt magnetized into nanomagnets with high spin polarization, which promote the adsorption of oxygen-intermediates and electron transfer, significantly improving the catalytic efficiency. Impressively, the half wave-potential is increased by 20 mV for ORR, and the overpotential at 10 mA cm-2 is decreased by 15 mV for OER. Compared with the commercial Pt/C+IrO2 catalysts, the magnetic catalyzed Zn-air batteries deliver 2.5-fold of capacities and exhibit much longer durability over 155 h. The findings point out a very promising strategy of using electromagnetic induction to boost oxygen catalytic activity
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4 |
|a Journal Article
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|a bifunctional oxygen catalysts
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| 650 |
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4 |
|a direct magnetic enhancement
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| 650 |
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4 |
|a macroporous carbon nanofibers
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| 650 |
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4 |
|a magnetic catalytic nanocages
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| 650 |
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4 |
|a rechargeable Zn-air batteries
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| 700 |
1 |
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|a Wang, Ying
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhang, Yuanyuan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Xia, Shuhui
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yu, Jianyong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ding, Bin
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 33(2021), 5 vom: 20. Feb., Seite e2007525
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
1 |
8 |
|g volume:33
|g year:2021
|g number:5
|g day:20
|g month:02
|g pages:e2007525
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| 856 |
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|u http://dx.doi.org/10.1002/adma.202007525
|3 Volltext
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