Résumé : Electroreduction of furfural, a platform chemical that can be obtained from lignocellulosic biomass and agriculturalwaste, was studied by coupling in-situ FTIR spectroscopy and cyclic voltammetry on gold and copperelectrodes in Deep Eutectic Solvent (DES) unconventional medium. Choline-glycerol DES medium was selectedby investigating with the help of NMR spectroscopy the stability of furfural in the two commonly used DES:choline chloride/urea 1:2 and glycerol 1:2. Instability of furfural in choline chloride/urea 1:2 and the presenceof a specific reaction between urea and furfural was evidenced with the same technique. After that, the electrochemicalstability of the glycerol DES itself was monitored by FTIR measurements in the absence and presenceof furfural. The product of furfural reduction, furfuryl alcohol, was evidenced. The influence of theelectrode morphology on the stability of the DES and the furfural behavior was investigated by synthesizingAu/C and Cu/C nanoparticles.