Synthesis of ozone from air via a polymer-electrolyte-membrane cell with a doped tin oxide anode

Wang, Yun‐Hai; Cheng, Shaoan; Chan, Kwong‐Yu

doi:10.1039/b516927e

Cited by 34 publications

(27 citation statements)

References 21 publications

(54 reference statements)

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“…However, a critical review of the literature revealed that the maximum U EOP value (plateau) is indeed system-dependent [11,12,14,15,[17][18][19][20][21][22]. A plausible explanation for the influence of MEA on U EOP can be provided taking into account the electrode mechanism reported previously for the simultaneous production of oxygen and ozone using inert electrodes [5,[27][28][29][30].…”

Section: Influence Of Temperature and Electric Currentmentioning

confidence: 99%

Characterization of an electrochemical reactor for the ozone production in electrolyte-free water

et al. 2010

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The filter-press electrochemical ozonizer is characterized as a function of the applied electric current, temperature, and linear velocity of the electrolyte-free water. Lead dioxide electroformed on surface of a nonplatinized fine mesh stainless steel support was used as anode. Electrolysis of the electrolyte-free water was carried out using the membrane electrode assembly (MEA) adequately compressed by means of a specially designed clamping system. Electrochemical characterization studies were carried out galvanostatically as a function of temperature and linear velocity of the circulating water. It was verified that the electrochemical ozone production (EOP) taking place at the reacting zones formed at the solid polymer electrolyte (SPE)/mesh electrode interface is not considerably affected by circulating water when the linear velocity inside the distribution channels is higher than 1.20 cm s -1 . A current efficiency for the EOP of 13% and a specific electric energy consumption of 70 Wh g -1 were obtained when an electric current of 130 A was applied at 30°C. The reactor service life test revealed that the MEA using the lead dioxide fine mesh electrode as anode and a fine mesh stainless steel electrode as cathode, pressed against the SPE, is stable for the ozone production.

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Section: Influence Of Temperature and Electric Currentmentioning

confidence: 99%

Characterization of an electrochemical reactor for the ozone production in electrolyte-free water

et al. 2010

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“…Indeed, the only products released during water electrolysis are oxygen/ozone and hydrogen [4,31]. In some cases, where the electrochemical reactor uses an air cathode, H 2 generation is replaced by oxygen reduction obtained from air [44,47,51,53,54].…”

Section: Advances In Electrochemical Technology For Ozone Generationmentioning

confidence: 99%

Electrochemical Ozone Production as an Environmentally Friendly Technology for Water Treatment

Franco

Jardim

Boodts³

et al. 2008

CLEAN Soil Air Water

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Research Article Electrochemical Ozone Production as an Environmentally Friendly Technology for Water TreatmentPerspectives, advances and environmental aspects concerning electrochemical ozone production applied to water purification are presented and discussed in relation to the conventional corona process (silent electric discharge). Ozone generated using a laboratory-made electrochemical reactor was applied for the discoloration/degradation of dyes used in the Brazilian textile industry and for degradation of endocrine disruptors. A constant ozone load of 0.35 l 0.02 g/h was used throughout. The study, concerning color removal from dye solutions, revealed that total discoloration is rapidly achieved. The degradation rate of the textile dyes evaluated by TOC is little affected by the dye composition and considerably influenced by the pH and ozonation time. Analysis of the COD/TOC-ratio indicates that ozonation increases oxidation feasibility of the organic matter (dye by-products) when compared to the original compounds. Ozonation of mixed aqueous solutions containing different endocrine disruptors revealed these compounds are totally degraded with a very high removal rate.

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“…International Journal of Electrochemistry Beta lead dioxide (β-PbO 2 ) [7][8][9][10][11], Pt [12,13], Pt composites [14,15], boron-doped diamond [16][17][18], dimensionally stable anodes [19,20], TiO 2 thin films on Si/TiO x /Pt substrate [21], and SnO 2 -based catalysts [22,23] are among the materials that have been used for EOP. Most of the investigations have been focused on β-PbO 2 which has shown a current efficiency of about 13% at room temperature [7].…”

mentioning

confidence: 99%

“…Wang et al have reported Ni and Sb codoped SnO 2 on Ti foil as a promising electrode for EOP [23,30]. They achieved a current efficiency of ∼35% for ozone production in acidic solution at low applied voltage at room temperature.…”

mentioning

confidence: 99%

Effect of Elemental Composition on the Structure, Electrochemical Properties, and Ozone Production Activity of Ti/SnO2-Sb-Ni Electrodes Prepared by Thermal Pyrolysis Method

Shekarchizade

Amini

2011

International Journal of Electrochemistry

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Ti/SnO2-Sb-Ni electrodes with various Ni- and Sb-doping levels have been prepared by dip-coating thermal pyrolysis procedure, and their simultaneous electrochemical ozone production (EOP) and oxygen evolution reaction (OER) were investigated. The effects of electrode composition on the nanostructure, morphology, electrochemical behavior, kinetic parameters, and lifetime of the electrodes were systematically studied using X-ray diffraction, scanning electron microscopy, cyclic voltammetry, linear sweep voltammetry, and chronopotentiometry. Dissolved ozone was produced in a quartz cell and its concentration was monitored by in situ UV spectrophotometry. The presence of small amounts of Ni (Ni : Sn atomic ratio of 0.2 : 100) gives valuable characteristics to the electrodes such as increasing EOP activity and service life. Higher Ni concentrations increase the electrode film resistance and decrease its capacitance, roughness factor, and service life, while increasing Sb level up to 12 atom% improves the electrode performance with respect to these parameters. Nevertheless, the Sb/Sn atomic ratio of more than 2% reduces the EOP current efficiency in favor of OER. The optimum composition of the electrode for EOP was determined to be Sb/Sn and Ni/Sn atomic ratios of 2% and 0.2%, respectively. The highest current efficiency was 48.3% in 0.1 M H2SO4solution at room temperature.

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Synthesis of ozone from air via a polymer-electrolyte-membrane cell with a doped tin oxide anode

Cited by 34 publications

References 21 publications

Characterization of an electrochemical reactor for the ozone production in electrolyte-free water

Characterization of an electrochemical reactor for the ozone production in electrolyte-free water

Electrochemical Ozone Production as an Environmentally Friendly Technology for Water Treatment

Effect of Elemental Composition on the Structure, Electrochemical Properties, and Ozone Production Activity of Ti/SnO2-Sb-Ni Electrodes Prepared by Thermal Pyrolysis Method

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