Synthesis of peroxyacetic acid using in situ electrogenerated hydrogen peroxide on gas diffusion electrode

Saha, Madhu Sudan; Denggerile, Ao; Nishiki, Yoshinori; Furuta, Tsuneto; Ohsaka, Takeo

doi:10.1016/s1388-2481(03)00097-3

Cited by 27 publications

(22 citation statements)

References 20 publications

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“…This result can be expected from the fact that the PAA is produced from a chemical reaction of acetic acid with hydrogen peroxide that is produced from the reduction of oxygen in the presence of Nafion-H beads. 16,20 Effect of flow rate of electrolyte solution.-Influence of the electrolyte flow rate on the concentration of hydrogen peroxide and current efficiency for its accumulation in a three-chamber cell is shown in Fig. 6.…”

Section: Resultsmentioning

confidence: 99%

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Electrolytic Synthesis of Peroxyacetic Acid Using In Situ Generated Hydrogen Peroxide on Gas Diffusion Electrodes

Saha¹,

Nishiki²,

Furuta³

et al. 2004

J. Electrochem. Soc.

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An electrochemical method for the preparation of peroxyacetic acid ͑PAA͒ using in situ generated hydrogen peroxide on the gas diffusion electrode ͑GDE͒ as an oxygen cathode has been described. Effects of several experimental conditions, such as current density, oxygen feed rate, electrolyte concentration, electrolytic cell configuration, flow rate of electrolyte solution, and Pt catalyst incorporated into GDE upon the cathodic reaction of oxygen to hydrogen peroxide as well as the production of PAA solution, have been investigated. Hydrogen peroxide is electrogenerated by the reduction of oxygen on the GDE and the generated hydrogen peroxide can undergo a chemical reaction with acetic acid in the presence of solid superacid, Nafion-H as a catalyst to produce PAA. It is also suggested that the formation of PAA is initiated by the active oxygen, O*, electrogenerated on the cathode surface. The current efficiency for the production of PAA was found to be 28% at a current density of 1 A/dm 2 and electrolyte flow rate of 160 mL/h. A probable reaction mechanism for the formation of PAA is proposed.

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Section: Resultsmentioning

confidence: 99%

“…16 The GDEs with and without Pt catalyst were used as the cathodes to electrogenerate hydrogen peroxide. Both GDEs were obtained from E-TEK Inc. ͑Somerset, NJ͒.…”

Section: Methodsmentioning

confidence: 99%

Electrolytic Synthesis of Peroxyacetic Acid Using In Situ Generated Hydrogen Peroxide on Gas Diffusion Electrodes

Saha¹,

Nishiki²,

Furuta³

et al. 2004

J. Electrochem. Soc.

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“…A red shift of the maximum absorption peak of the UV-vis spectrum occurred after the reaction (Fig. 6c) (27). This may be due to an increase in conjugation caused by the formation of peroxyvaleric acid.…”

Section: Study Of Mechanism For the CL Reactionmentioning

confidence: 90%

Chemiluminescence of the peroxomonosulphate–cobalt(II)–aliphatic monocarboxylic acids system

2007

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A weak chemiluminescence (CL) emission was observed due to the production of singlet oxygen ((1)O(2)) during the decomposition of peroxomonosulphate (HSO(5)(-)) catalysed by cobalt(II). Low molecular mass aliphatic monocarboxylic acids, such as formic, acetic, propionic, butyric and valeric acids, influenced the CL emission, and the reaction of aliphatic monocarboxylic acids with HSO(5)(-)/Co(2+) solution was further investigated using a flow injection analysis (FIA) CL method. The results indicated that the CL intensities of aliphatic monocarboxylic acids were improved with increase in the carbon chain length in the potassium peroxomonosulphate-cobalt(II) sulphate system. Generation of singlet oxygen was confirmed by the fact that the CL emission of aliphatic monocarboxylic acids with the HSO(5)(-)/Co(2+) solution was quenched by NaN(3), and from the CL spectrum of the reaction system. Additionally, a possible mechanism of aliphatic monocarboxylic acids CL emission enhancement was proposed.

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“…Furthermore, this process is not suitable for applications requiring either a neutral or an acid pH. Besides H 2 O 2 production on trickle bed, catalyzed gas diffusion electrode (GDE) have also been used as cathodes to produce hydrogen peroxide by the reduction of oxygen in both alkaline [6][7][8][9] and acidic media [10]. These electrodes are usually made of a carbon cloth covered with a layer composed of a catalyst mixed with carbon black and a low proportion of PTFE.…”

Section: Introductionmentioning

confidence: 99%

Electrogeneration of Hydrogen Peroxide in Acid Medium using Pyrolyzed Cobalt-based Catalysts: Influence of the Cobalt Content on the Electrode Performance

et al. 2006

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Cobalt tetramethoxyphenyl porphyrin (CoTMPP) adsorbed on a high area carbon support (Vulcan XC72-R) and heat-treated at 900°C under inert atmosphere was studied as electrocatalyst for the reduction of O 2 to H 2 O 2 in acid medium. Experiments performed on rotating ring-disc electrode (RRDE) and gas diffusion electrode (GDE) show that the catalyst performance depends on the cobalt loading, going through a maximum at 0.2 wt. % Co. For higher cobalt loadings, a growing part of oxygen is reduced into water, decreasing therefore the selectivity of the catalyst. These results are interpreted in terms of a further reduction of H 2 O 2 on Co-based catalytic sites before leaving the catalytic layer. For a GDE polarized at )150 mV vs. saturated calomel electrode (SCE) and loaded with 0.9 lg cm )2 of 0.2 wt. % Co-based catalyst, a H 2 O 2 production rate of 300 lmol h )1 cm )2 was obtained which is five times higher than the H 2 O 2 production rate measured with Vulcan. In these conditions, the selectivity of the Co-based catalyst for H 2 O 2 production is 92%. The good agreement observed between RRDE and GDE results confirms the relevance of using RRDE experiment for screening these non-precious metal catalysts for further GDE applications.

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Synthesis of peroxyacetic acid using in situ electrogenerated hydrogen peroxide on gas diffusion electrode

Cited by 27 publications

References 20 publications

Electrolytic Synthesis of Peroxyacetic Acid Using In Situ Generated Hydrogen Peroxide on Gas Diffusion Electrodes

Electrolytic Synthesis of Peroxyacetic Acid Using In Situ Generated Hydrogen Peroxide on Gas Diffusion Electrodes

Chemiluminescence of the peroxomonosulphate–cobalt(II)–aliphatic monocarboxylic acids system

Electrogeneration of Hydrogen Peroxide in Acid Medium using Pyrolyzed Cobalt-based Catalysts: Influence of the Cobalt Content on the Electrode Performance

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