Comparative Study of the Efficiency of New Technical Carbons СН210 and С40 in Electrosynthesis of Н2О2 from О2 in Gas-Diffusion Electrodes on Their Basis

V. L. KornienkoV. L. Kornienko, G. A. KolyaginG. A. Kolyagin, G. V. KornienkoG. V. Kornienko, V. A. ParfenovV. A. Parfenov
Российский электрохимический журнал
Abstract / Full Text

The efficiency of new brands of technical carbon CH210 and C40 in the electrogeneration of Н2О2 from О2 in gas-diffusion electrodes (GDE) on their basis is studied in acidic solutions of the 0.5 М K2SO4 : 0.1 M H2SO4 (3 : 1) electrolyte. The textural characteristics of original materials and their mixtures with polytetrafluoroethylene used as the hydrophobizer are determined by low-temperature nitrogen adsorption as well as their electric double layer capacitance. For a comparison, similar studies are also carried out with technical carbon Vulcan XC-72. The rate constants for hydrogen peroxide decomposition on these materials in acidic solutions are determined. The data on the kinetics of hydrogen peroxide accumulation at the overall current density of 1500 А/m2 are as follows: the 6 h electrolysis produces the solution with Н2О2 concentration exceeding 2.5 М with the current efficiency higher than 70.0%. It is concluded that in this case, the surface area is not the determining factor. The technical carbons СН210 and С40 are comparable as regards their efficiency with the well-known technical carbon Vulcan XC-72 and can be used as electrocatalysts in GDE for electrosynthesis of Н2О2 from О2.

Author information
  • Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Federal Research Institute “Krasnoyarsk Research Center,” Siberian Branch, Russian Academy of Sciences, 660036, Krasnoyarsk, Russia

    V. L. Kornienko, G. A. Kolyagin & G. V. Kornienko

  • Reshetnev Siberian State University of Science and Technology, 660049, Krasnoyarsk, Russia

    V. A. Parfenov

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