Abstract
In this work some important aspects related to the electrocatalytic reduction of pyruvate on copper cathode were investigated in alkaline medium (0.5 mol/L NaOH). In situ IR reflectance spectroscopy (SPAIRS and SNIFTIRS techniques) was used to investigate the adsorbed intermediates and reaction products from the reduction of pyruvate. The results revealed that hydrogenation of the substrate to lactate occurred at the copper surface involving weakly adsorbed species. The identification of the different electroreactive species allowed to postulate a reaction mechanism for the transformation of pyruvate into lactate on copper.Key words: copper, electroreduction, pyruvate, lactate, in situ infrared reflectance spectroscopy, reaction mechanism.
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