A novel dual gas diffusion electrodes system for efficient hydrogen peroxide generation used in electro-Fenton

Yu, Xinmin; Zhou, Minghua; Ren, Gang; Ma, Liang

doi:10.1016/j.cej.2014.11.053

Cited by 233 publications

(124 citation statements)

References 42 publications

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“…Since the generation of Å OH is highly dependent on the electrode materials, their optimization and configuration are decisive to increase the concentration of this reagent on solution and thus the effectiveness of the oxidative treatment [20].…”

Section: Introductionmentioning

confidence: 99%

Application of a new sandwich of granular activated and fiber carbon as cathode in the electrochemical advanced oxidation treatment of pharmaceutical effluents

Bocos

Alfaya

Iglesias

et al. 2015

Separation and Purification Technology

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Section: Introductionmentioning

confidence: 99%

Application of a new sandwich of granular activated and fiber carbon as cathode in the electrochemical advanced oxidation treatment of pharmaceutical effluents

Bocos

Alfaya

Iglesias

et al. 2015

Separation and Purification Technology

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“…The H 2 O 2 concentrations and current efficiency in this study were comparable to those in other H 2 O 2 electrochemical generation processes using GDCs. 30,31 Nevertheless, our results demonstrated that the pore former could improve the H 2 O 2 production in the electrochemical process, which should be important for the EF application in practice.…”

Section: Performance Of Gas Diffusion Cathodementioning

confidence: 99%

Effect of an improved gas diffusion cathode on carbamazepine removal using the electro-Fenton process

Wang

Luo

et al. 2017

RSC Adv.

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The aim of this study was to investigate the effect of the diffusion layer of a gas diffusion cathode (GDC) on H 2 O 2 production to enhance carbamazepine removal using the electro-Fenton process. The diffusion layer was made by carbon black and polytetrafluoroethylene with sodium sulfate (Na 2 SO 4 ) as a pore former. Different ratios of Na 2 SO 4 to carbon black (w/w) (i.e., 0%, 50%, 100%, 150%, and 200%) in the diffusion layer were tested. With an increase of the ratio, the average pore size in the diffusion layer and the electro-activity in the GDC increased simultaneously, which resulted in a higher mass transfer coefficient ), mainly attributable to the diffusion layer modified by the pore former, which accelerated oxygen transfer and boosted H 2 O 2 production. The results from this study should be useful to remove carbamazepine from wastewater treatment using the electro-Fenton (EF) process with improvement of pore structure in the diffusion layer of GDC.

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“…On the contrary, electrosynthesis methods present various advantages, e.g., the use of catalysts immobilized in the electrode structure, and the inexpensive carbonaceous materials with high catalytic performances for H 2 O 2 production. [9][10][11][12] The GDE is composed of an active layer and a gas diffusion layer, which allows an unlimited supply of gaseous reagents to pass through the porous structure to the electrode/electrolyte interface, thus preventing mass transport limitation of the reaction of interest. 8 Of all the electrode structures, the gas diffusion electrode (GDE) has attracted great attention owing to its relatively high H 2 O 2 production.…”

Section: Introductionmentioning

confidence: 99%

“…8 Of all the electrode structures, the gas diffusion electrode (GDE) has attracted great attention owing to its relatively high H 2 O 2 production. 9,14 Depending on the different cathode materials and electrode components, the H 2 O 2 yield and current efficiency differ greatly. 7,13 In the electrolytic process, the catalytic layer faces the electrolyte while the gas diffusion layer faces the reactant gas which diffuses through the micro-pores of the GDE to the catalytic layer and reacts with the electrolyte at the interface between the electrolyte and the reactant gas.…”

Section: Introductionmentioning

confidence: 99%

In situ electrosynthesis of hydrogen peroxide with an improved gas diffusion cathode by rolling carbon black and PTFE

Luo

et al. 2015

RSC Adv.

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A simply structured gas diffusion electrode (GDE) was constructed by rolling carbon black and PTFE as a conductive catalyst layer to enhance the producibility of hydrogen peroxide. A Box-Behnken design (BBD) coupled with response surface methodology was employed to assess the individual and interactive effects of the three main independent parameters (pH, current density and air flow rate) on the H 2 O 2 concentration. Analysis of variance (ANOVA) showed a high coefficient of determination value. Optimal operating conditions were a pH value of 4.0, current density of 52 mA cm À2 , and an air flow rate of 55 mL min À1 . The predicted H 2 O 2 concentration under the optimal conditions determined by the proposed model was 309.85 mM, demonstrating the improved GDE without using noble metals and other chemical promoters is a potential method for in situ electrosynthesis of H 2 O 2 . Results also revealed that the current density, air flow rate, and their interaction effect had a significant effect on the H 2 O 2 concentration, whereas changes to the initial pH had no apparent effect. Experiments showed that current density has a direct effect on the decomposition reaction in the electrolytic process.

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A novel dual gas diffusion electrodes system for efficient hydrogen peroxide generation used in electro-Fenton

Cited by 233 publications

References 42 publications

Application of a new sandwich of granular activated and fiber carbon as cathode in the electrochemical advanced oxidation treatment of pharmaceutical effluents

Application of a new sandwich of granular activated and fiber carbon as cathode in the electrochemical advanced oxidation treatment of pharmaceutical effluents

Effect of an improved gas diffusion cathode on carbamazepine removal using the electro-Fenton process

In situ electrosynthesis of hydrogen peroxide with an improved gas diffusion cathode by rolling carbon black and PTFE

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