Co, Fe codoped holey carbon nanosheets as bifunctional oxygen electrocatalysts for rechargeable Zn-air batteries

Unique Co, Fe codoped holey carbon nanosheets with high surface area and abundant bimetal single atoms (CoFe@HNSs) exhibited remarkable bifunctional oxygen electrocatalytic activity (0.704 V) with very positive half-wave potential (0.897 V) for the ORR and small potential (1.601 V) to drive 10 mA cm...

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Published inChemical communications (Cambridge, England) Vol. 57; no. 16; pp. 249 - 252
Main Authors Zhang, Xueting, Zhu, Zhenye, Tan, Yuanbo, Qin, Ke, Ma, Fei-Xiang, Zhang, Jiaheng
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 25.02.2021
Subjects
Bimetals
Carbon
Cobalt
Electrocatalysts
energy
Energy storage
Iron
Metal air batteries
Nanosheets
oxygen
Rechargeable batteries
surface area
Zinc-oxygen batteries
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Summary:Unique Co, Fe codoped holey carbon nanosheets with high surface area and abundant bimetal single atoms (CoFe@HNSs) exhibited remarkable bifunctional oxygen electrocatalytic activity (0.704 V) with very positive half-wave potential (0.897 V) for the ORR and small potential (1.601 V) to drive 10 mA cm −2 for the OER, outperforming commercial Pt/C and IrO 2 , respectively. Furthermore, as the air-cathode for rechargeable Zn-air batteries, the CoFe@HNS based device exhibits a high-power density of 131.3 mW cm −2 and long-term stability over 140 h, indicating the attractive potential of CoFe@HNSs applied in energy storage and conversion. CoFe@HNSs exhibited bifunctional oxygen electrocatalytic activity, and exhibit a high-power density of 131.3 mW cm −2 and long-term stability over 140 h.
Bibliography:Electronic supplementary information (ESI) available. See DOI
10.1039/d0cc07767d
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SourceType-Scholarly Journals-1
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ISSN:1359-7345
1364-548X
1364-548X
DOI:10.1039/d0cc07767d