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Liang Chen
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences
Corresponding Author
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Fast and stable production of hydrogen peroxide (H2O2) through electrochemical pathways is crucial for wastewater treatment applications. With this objective, herein we report an integrated and superaerophilic electrode composed of atomically dispersed Ni-O-C sites enriched carbon nanosheets (IS-NiOC electrode) for electrochemical oxygen reduction to produce H2O2. Both experimental and theoretical results have proven that atomically dispersed Ni-O-C sites enable a low overpotential (260 mV at 0.1 mA cm− 2) and high selectivity (> 90% at 0.0 ~ 0.5 V vs. RHE) in neutral electrolyte. Compared with a commercial gas-diffusion electrode, the IS-NiOC electrode offers stronger affinity to oxygen bubbles and more robust three-phase contact points, resulting in high current density (~ 106 mA cm− 2 at 0.25 V vs. RHE) and superior stability (~ 200 h). These merits allow the application of the IS-NiOC electrode in an electro-Fenton-like process, which enables fast degradation of representative organic pollutants in both steady state and flow state.
Keywords
wastewater treatment, hydrogen peroxide (H2O2)
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Supplementary Movie 1
- SupplementaryMovie2.mkv
Supplementary Movie 2
- supportinginformationSNOC.pdf
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This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Article
Liang Chen
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 09 Feb, 2021
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Fast and stable production of hydrogen peroxide (H2O2) through electrochemical pathways is crucial for wastewater treatment applications. With this objective, herein we report an integrated and superaerophilic electrode composed of atomically dispersed Ni-O-C sites enriched carbon nanosheets (IS-NiOC electrode) for electrochemical oxygen reduction to produce H2O2. Both experimental and theoretical results have proven that atomically dispersed Ni-O-C sites enable a low overpotential (260 mV at 0.1 mA cm− 2) and high selectivity (> 90% at 0.0 ~ 0.5 V vs. RHE) in neutral electrolyte. Compared with a commercial gas-diffusion electrode, the IS-NiOC electrode offers stronger affinity to oxygen bubbles and more robust three-phase contact points, resulting in high current density (~ 106 mA cm− 2 at 0.25 V vs. RHE) and superior stability (~ 200 h). These merits allow the application of the IS-NiOC electrode in an electro-Fenton-like process, which enables fast degradation of representative organic pollutants in both steady state and flow state.
Figure 1
Figure 2
Figure 3
Figure 4
There is NO Competing Interest.
This is a list of supplementary files associated with this preprint. Click to download.
- SupplementaryMovie1.mkv
Supplementary Movie 1
- SupplementaryMovie2.mkv
Supplementary Movie 2
- supportinginformationSNOC.pdf
Supplementary Information
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