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The purpose of this paper is to show the studies made on the pyrazine-2,3-dicarboxylic acid (PDCA) synthesis process by quinoxaline chemical oxidation on the nickel electrode with electrochemically regenerated potassium permanganate (KMnO₄). It was followed the investigation of electrode reaction through cyclic voltammetry and the making of an efficient electrolyser for PDCA synthesis. Anodic regeneration of Mn⁷⁺ on the nickel electrode is possible. This process is favoured by KOH, Mn⁷⁺ (Mn⁶⁺ implicitly) and quinoxaline concentrations increase as well as temperature increase. Current and substance efficiencies of 80% and 85%, respectively, were achieved.

Keywords: quinoxaline, pyrazine-2,3-dicarboxylic acid, potassium permanganate, cyclic voltammetry, electrolysis, nickel electrode.