Carbon supported palladium, gold and platinum nanoparticles were synthesized by microemulsion method in order to compare their catalytic activity for the electrooxidation of borohydride in alkaline medium. Two different pathways can be considered for this oxidation reaction: the direct oxidation of BH4- into BO2- and its indirect oxidation via hydrogen evolution. The electrochemical analysis of the polarisation curves recorded at different electrode rotation rates at Pd/C and Au/C in NaOH + NaBH4 electrolyte indicated that the electrooxidation process mainly occured following the direct pathway on both catalysts with 6 to 7 moles of exchanged electrons per mole of borohydride. On the other hand, on Pt/C catalyst, the oxidation reaction occurs with a strong hydrogen evolution. Furthermore, the kinetics parameters pointed out a ten times higher intrinsic catalytic activity of Pd/C compared to Au/C for borohydride oxidation reaction (bor).