Russian Journal of Electrochemistry. Vol. 52, No. 2, Pages 185-191, 2016

Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, bld. 24, Krasnoyarsk, 660036 Russia

Abstract—Gas-diffusion electrodes containing polytetrafluoroethylene, acetylene black A437E and its mixtures with two types of furnace black (P702 and P268E) with different size of particles are studied. The electrode capacitance, the average diameter and volume of pores and their surface area are investigated as a function of the electrode composition. The kinetic characteristics of electrodes in the oxygen electroreduction are assessed. The slope of polarization curves in Tafel coordinates and the transfer coefficient value are shown to be virtually independent of the electrode composition. The preparative synthesis of Н₂О₂ is carried out.

Keywords: gas-diffusion electrode (GDE), structural and electrochemical characteristics of GDE, acetylene black, furnace black, double-layer capacitance, diameter of hydrophilic pores, oxygen electroreduction, electrosynthesis of hydrogen peroxide

The Effect of Carbon Black Mixture Composition on the Structural and Electrochemical Characteristics of Gas Diffusion Electrodes for Electrosynthesis of Hydrogen Peroxide