Abstract
The method of productiion of the composite selenium-graphitic electrodes based on organic polymer binder was proposed. Electrochemical behavior of the elementary selenium as content of composite electrode in sulfuric acid medium was assessed. A formation of hydrogen selenide during the cathode polarization, and formation of selenite and selenate ions was shown. An influence of potential spread velocity, acid concentration, and temperature of electrolyte were evaluated. Effective activation power for cathode process was estimated using the temperature-cathodic method.
Highlights
Selenium and its compounding have been found widespread use in the industry and the medicine
Cathodic space of the potential area is characterized by 1 current wave in potential -900 мV, which corresponds to double-electron selenium reduction with formation of hydrogen selenide according to reaction: Se + 2H+ + 2e = H2Se
It should be noted that formation of selenate ions is determined by direct selenium oxidation with release of six electrons, as selenite ion is not oxidated in the acid medium
Summary
Selenium and its compounding have been found widespread use in the industry and the medicine.
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