Journal
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
Volume 83, Issue -, Pages 59-63Publisher
ELSEVIER
DOI: 10.1016/j.jtice.2017.10.041
Keywords
Electro-Fenton; Hydrogen peroxide; Oxygen reduction reaction; Pulsed current; Graphite felt
Categories
Funding
- National Natural Science Foundation of China [91434134]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [51421063]
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H2O2 production is the decisive factor of Electro-Fenton performance on contaminants degradation. Herein, a novel but simple strategy was proposed for drastically enhanced H2O2 production from anodic O-2 electroreduction. H2O2 concentration at steady-state is 99.5% higher under pulsed current of 2sON-2sOFF than under constant current when using reticulated vitreous carbon foam (RVC foam) cathode. This was caused by the facilitated H2O2 diffusion from the porous cathode to bulk as H2O2 electroreduction pathway was weakened. Additionally, the enhancement effect is more significant for RVC foam with low PPI. This strategy is also applicable to graphite felt (GF) cathode, in which a 56.0% higher H2O2 concentration was observed at steady-state under pulsed current of 2sON+ 2sOFF. Investigation on pulse frequency shows there exists an optimal frequency that achieves both effective H2O2 electro-generation and decreased H2O2 electroreduction. (C) 2017 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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