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Erschienen in: Journal of Nanoparticle Research 5/2022

01.05.2022 | Research paper

B, N-doped carbon nanosheets embedded with Co nanoparticles for enhanced oxygen reduction reaction

verfasst von: Xiaohan Sun, Xiaoguo Tie, Yurui Zhang, Zhengwei Zhao, Qiaoxia Li, Yulin Min, Qunjie Xu

Erschienen in: Journal of Nanoparticle Research | Ausgabe 5/2022

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Abstract

Co-based materials with optimized adsorption energy of reaction intermediates have become the promising electrocatalyst for enhanced oxygen reduction reaction (ORR). Here, B, N-doped carbon nanosheets embedded with Co nanoparticles are reported by a simple wet chemical method and further pyrolysis process. The average size of Co nanoparticles is 10.03 ± 1.6 nm. X-ray photoelectron spectroscopy and electrochemical measurements show that those doped with B enrich active sites of the catalyst with highly active B-C bond and provide greater electrochemical surface area for ORR. The material shows impressive ORR performance with a positive half-wave potential of 0.87 V and a superior limiting current density of 6.88 mA cm−2 outperforming commercial Pt/C in alkaline solution. Noticeably, the optimized electron structure of Co–N species significantly weakens the Co–O bond and adsorption energy of OOH*, which could promote the occurrence of close to the four-electron ORR process. This work, besides showing electrocatalysts with excellent ORR performance, provided an approach for optimizing catalytic activity of Co-based materials.

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Metadaten
Titel
B, N-doped carbon nanosheets embedded with Co nanoparticles for enhanced oxygen reduction reaction
verfasst von
Xiaohan Sun
Xiaoguo Tie
Yurui Zhang
Zhengwei Zhao
Qiaoxia Li
Yulin Min
Qunjie Xu
Publikationsdatum
01.05.2022
Verlag
Springer Netherlands
Erschienen in
Journal of Nanoparticle Research / Ausgabe 5/2022
Print ISSN: 1388-0764
Elektronische ISSN: 1572-896X
DOI
https://doi.org/10.1007/s11051-022-05409-3

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