Electrochemical synthesis of pyrazine-2,3-dicarboxylic acid. Studies carried out using cyclic voltammetry on a stainless steel electrode [articol]

Abstract

The studies show the regeneration process of KMnO4 on stainless stell electrode, comparative with the ones obtained on platinum electrode. The studies were made through cyclic voltammetry at concentrations of support electrolyte (KOH) of about 5 to 10%, at 25-40ºC temperature, KMnO4 concentration until 6•10-2 M and maximum concentration of quinoxaline until 2.61•10-2 M, in electrolyte solution. It seems that on stainless steel electrode is not possible to do the oxidation of Mn6+ to Mn7+ like on paltinum [1,2], nickel [3] or copper electrode [4]. However, a final decision will be made after the effectuation of new investigations (preliminary synthesis).