Electrosynthesis of Н2О2 from О2 in a Gas-Diffusion Electrode Based on Mesostructured Carbon CMK-3

Mesostructured carbon CMK-3 (Carbon Mesostructured by KAIST) synthesized by the template method is studied as the electrocatalyst for electrosynthesis of Н 2 О 2 from О 2 in a gas-diffusion electrode (GDE) in alkaline and acidic solutions. The texture characteristics of the original material and its...

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Bibliographic Details
Published in:Russian journal of electrochemistry 2018-03, Vol.54 (3), p.258-264
Main Authors: Kornienko, V. L., Kolyagin, G. A., Kornienko, G. V., Parfenov, V. A., Ponomarenko, I. V.
Format: Article
Language:English
Subjects:
Carbon
Chemistry
Chemistry and Materials Science
Current efficiency
Diffusion
Diffusion electrodes
Electrochemistry
Hydrogen peroxide
Mathematical analysis
Physical Chemistry
Polytetrafluoroethylene
Rate constants
Reduction
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Summary:Mesostructured carbon CMK-3 (Carbon Mesostructured by KAIST) synthesized by the template method is studied as the electrocatalyst for electrosynthesis of Н 2 О 2 from О 2 in a gas-diffusion electrode (GDE) in alkaline and acidic solutions. The texture characteristics of the original material and its mixture with hydrophobizer (polytetrafluoroethylene) are studied by the method of low-temperature nitrogen adsorption. The rate constants for hydrogen peroxide decomposition on these materials in alkaline and acidic solutions are calculated. Kinetic parameters of oxygen reduction in alkaline and acidic solutions are determined as well as the capacitance of gas-diffusion electrodes based on mesocarbon. The selectivity of the electrocatalyst is estimated by finding the current fracture γ consumed in oxygen reduction to hydrogen peroxide. Data on the kinetics of hydrogen peroxide accumulation during electrosynthesis of Н 2 О 2 from О 2 are obtained. The acidic solution of hydrogen peroxide with the concentration more than 3 M is obtained with the current efficiency higher than 80%.
ISSN:1023-1935
1608-3342
DOI:10.1134/S1023193518030060