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Nitrogen-doped graphene quantum dots decorated graphite foam as ultra-high active free-standing electrode for electrochemical hydrogen evolution and phenol degradation

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Authors
Guo, X.
Zhu, Y.
Han, W.
Fan, X.
Li, Y.
Zhang, F.
Zhang, G.
Peng, W.
Wang, Shaobin
Date
2018
Type
Journal Article

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Guo, X. and Zhu, Y. and Han, W. and Fan, X. and Li, Y. and Zhang, F. and Zhang, G. et al. 2018. Nitrogen-doped graphene quantum dots decorated graphite foam as ultra-high active free-standing electrode for electrochemical hydrogen evolution and phenol degradation. Chemical Engineering Science.
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Chemical Engineering Science
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WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
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Abstract

© 2018 Elsevier Ltd In this study, nitrogen-doped graphene quantum dots (N-GQDs, ~5 nm) were synthesized and supported on graphite foam (GF) by a facile hydrothermal route. The obtained N-GQDs/GF composite demonstrates as an ultra-active free-standing electrode for electrochemical hydrogen evolution and activation of peroxymonosulfate to degrade phenol pollutant. An overpotential in the electrochemical hydrogen evolution is only -72 mV vs. RHE at 10 mA/cm 2 with a Tafel slope of 84 mV/Dec. The N-GQDs/GF electrode can also achieve 100% phenol removal in short time in electrochemical degradation.