Electrochemical jet-cell for the in-situ generation of hydrogen peroxide

Pérez, J.F.; Llanos, Javier; Sáez, Cristina; López, C.; Cañizares, Pablo; Rodrigo, Manuel A.

doi:10.1016/j.elecom.2016.08.007

Cited by 108 publications

(81 citation statements)

References 17 publications

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“…As the applied potential increases, the electron transfer is enhanced. However, when it continues to increase to a certain extent, ORR will be controlled by oxygen mass transfer 13,14 due to the low solubility of oxygen in water at room temperature and pressure (~8 mg L −1 ), leading to retarded kinetics of the two-electron ORR 15 .…”

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confidence: 99%

Highly efficient electrosynthesis of hydrogen peroxide on a superhydrophobic three-phase interface by natural air diffusion

et al. 2020

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Hydrogen peroxide (H 2 O 2) synthesis by electrochemical oxygen reduction reaction has attracted great attention as a green substitute for anthraquinone process. However, low oxygen utilization efficiency (<1%) and high energy consumption remain obstacles. Herein we propose a superhydrophobic natural air diffusion electrode (NADE) to greatly improve the oxygen diffusion coefficient at the cathode about 5.7 times as compared to the normal gas diffusion electrode (GDE) system. NADE allows the oxygen to be naturally diffused to the reaction interface, eliminating the need to pump oxygen/air to overcome the resistance of the gas diffusion layer, resulting in fast H 2 O 2 production (101.67 mg h-1 cm-2) with a high oxygen utilization efficiency (44.5%-64.9%). Long-term operation stability of NADE and its high current efficiency under high current density indicate great potential to replace normal GDE for H 2 O 2 electrosynthesis and environmental remediation on an industrial scale.

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confidence: 99%

Highly efficient electrosynthesis of hydrogen peroxide on a superhydrophobic three-phase interface by natural air diffusion

et al. 2020

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“…A key aspect to be considered for the success of an electrochemical synthesis process is a proper design of the reactor. In this research field, our research group recently developed a flow through jet reactor (described in the experimental section) that efficiently performs the production of H 2 O 2 . This reactor design is based on the use of a flow‐through carbon‐based cathode and on the application of a jet aerator as an O 2 supplier instead of using a compressor.…”

Section: Resultsmentioning

confidence: 99%

“…The temperature was kept constant at 25 °C by a heat exchanger. A carbon felt (CF) material was selected as cathode, modified by immersing in a solution of distilled water (30 mL), carbon black (0.3 g Vulcan ® XC72R), PTFE (0.3 g 60% Teflon ® emulsion solution from ElectroChem, Inc.) and n ‐butanol (3%) for 60 min in an ultrasonic bath . A BDD provided by NeoCoat (La Chaux‐de‐Fonds, Switzerland) was used (boron content 500–700 ppm; sp 3 :sp 2 ratio = 220 ± 5%; thickness 2.7 μm ± 10%).…”

Section: Methodsmentioning

confidence: 99%

“…In this research wileyonlinelibrary.com/jctb field, our research group recently developed a flow through jet reactor (described in the experimental section) that efficiently performs the production of H 2 O 2 . [15][16][17] This reactor design is based on the use of a flow-through carbon-based cathode and on the application of a jet aerator as an O 2 supplier instead of using a compressor. Based on this idea, a similar concept was developed to produce PAA in the search for a higher efficiency in the production of these valuable products.…”

Section: Role Of the Reactor Configurationmentioning

confidence: 99%

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Reactor design as a critical input in the electrochemical production of peroxoacetic acid

Llanos

Moraleda

Sáez

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND In the present work, the influence of the most critical inputs affecting reactor design for the simultaneous electrochemical production of peroxoacetic acid (PAA) and hydrogen peroxide are studied. Based on our previous findings, we studied the role of the ratio between the volume of the solution (related to the chemical equilibrium between PAA and hydrogen peroxide) and the intensity (related to the rate and efficiency of the electrochemical processes) for a reactor equipped with a boron‐doped diamond anode and a gas diffusion cathode (GDE reactor). Moreover, we tested the performance of a jet‐based reactor for the production of PAA. RESULTS According to the results, it can be stated that the production of PAA is robust and stable when working at volume:intensity ratios equal or higher than 8.12 L A−1. Moreover, it was found that current densities ≈27 A m−2 are suitable for both reactor designs. Finally, it was observed that the production rate of PAA is higher for the GDE reactor due to the higher value of the volume:intensity ratio, the higher relative cathode versus anode area and the reactor configuration (anode–cathode). CONCLUSION This complex scenario demonstrates the key role of the reactor design and clarifies the future research lines that have to be further developed towards the efficient electrochemical production of peroxoacetic acid. © 2019 Society of Chemical Industry

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“…In previous works, it was shown that various approaches can be attempted to try to solve such problems. The problem of the low solubility of oxygen in water can be minimized using innovative cathodes, including gas diffusion electrodes (GDEs) and modified carbon felts (MCF) or advanced cells, such as jet‐cells, micro fluidic cells and pressurized reactors . Moreover, various heterogeneous catalysts have been tested in order to increase the working pH, including: cheap natural catalysts, such as pyrite and chalcopyrite; synthetic iron‐loaded structures, such as carbon nanotubes; resins, zeolites or biosorbents, zero‐valent ion (ZVI); and, metal‐organic frameworks .…”

Section: Introductionmentioning

confidence: 99%

Effective Removal and Mineralization of 8‐Hydroxyquinoline‐5‐sulfonic Acid through a Pressurized Electro‐Fenton‐like Process with Ni−Cu−Al Layered Double Hydroxide

et al. 2020

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Ni−Cu−Al layered double hydroxide (Ni−Cu−Al LDH) was proposed as an electro‐Fenton‐like catalyst for 8‐hydroxyquinoline‐5‐sulfonic acid (8‐HQS) removal in water. The properties of the prepared catalysts were characterized by using X‐ray, SEM and EDAX analyses. The effect of numerous operative parameters on the removal of 8‐HQS and total organic carbon (TOC) was studied. Very high level removal of both 8‐HQS and TOC (87 and 79 %, respectively) were obtained by using a pressurized electro‐Fenton‐like process (PrEFL‐LDH) at P=10 bars, using a Ti/IrO2‐Ta2O5 anode for 6 h. The process presented good performances in a large range of pH (3–10) and gave better removals of 8‐HQS and TOC with respect to that achieved by both i) EF catalyzed by homogeneous (FeSO4) or natural heterogeneous catalysts (pyrite and chalcopyrite) and ii) anodic oxidation at a boron doped diamond anode. Ni−Cu−Al LDH retained its catalytic activity after four cycles. Moreover, the carboxylic acid intermediates were identified and analyzed by HPLC.

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Electrochemical jet-cell for the in-situ generation of hydrogen peroxide

Cited by 108 publications

References 17 publications

Highly efficient electrosynthesis of hydrogen peroxide on a superhydrophobic three-phase interface by natural air diffusion

Highly efficient electrosynthesis of hydrogen peroxide on a superhydrophobic three-phase interface by natural air diffusion

Reactor design as a critical input in the electrochemical production of peroxoacetic acid

Effective Removal and Mineralization of 8‐Hydroxyquinoline‐5‐sulfonic Acid through a Pressurized Electro‐Fenton‐like Process with Ni−Cu−Al Layered Double Hydroxide

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