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Abstract <p>An effective method for hydrogen electrosynthesis has been proposed, based on direct/indirect oxidation of H<sub>2</sub>S into sulfur, accompanied by a release of H<sub>2</sub> in the cathodic reaction in an organic medium at room temperature. Direct oxidative activation of H<sub>2</sub>S has been studied by varying the controlled parameter (potential or current), the nature of the solvent and background electrolyte, the electrode material, and the reaction duration. An alternative approach to converting H<sub>2</sub>S into hydrogen and sulfur has been implemented using mediators of various structures. The most appropriate approach has turned out to be the use of 1,4-diazabicyclo[2.2.2.]octane as a mediator of H<sub>2</sub>S oxidation in <i>N</i>-methyl-2-pyrrolidone, with a decrease in the electrolysis potential by 0.8 V compared to the direct anodic process.</p>

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Direct and Indirect Methods of Electrosynthesis of Hydrogen Based on Hydrogen Sulfide

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • E. V. Shinkar’,
  • I. A. Nikitina,
  • A. A. Tishkov,
  • N. T. Berberova

摘要

Abstract

An effective method for hydrogen electrosynthesis has been proposed, based on direct/indirect oxidation of H2S into sulfur, accompanied by a release of H2 in the cathodic reaction in an organic medium at room temperature. Direct oxidative activation of H2S has been studied by varying the controlled parameter (potential or current), the nature of the solvent and background electrolyte, the electrode material, and the reaction duration. An alternative approach to converting H2S into hydrogen and sulfur has been implemented using mediators of various structures. The most appropriate approach has turned out to be the use of 1,4-diazabicyclo[2.2.2.]octane as a mediator of H2S oxidation in N-methyl-2-pyrrolidone, with a decrease in the electrolysis potential by 0.8 V compared to the direct anodic process.