▎ 摘　　要

In this paper, a study of the electrocatalytic oxidation of salicylic acid (SA) at graphene oxide/multiwalled carbon nanotubes (GO/MWCNTs) modified electrode is presented. Compared to GO or MWCNTs electrodes, the electro- oxidation of SA significantly enhanced at the GO/MWCNTs electrode, accounting for the synergistic effect of MWCNTs and GO, in which MWCNTs increased the electronic conductivity and GO provided a large specific surface area to increase the loading amount of SA. Then the GO/MWCNTs electrode was applied for the electrochemical determination of SA in PBS at pH 6.5. Under the optimized conditions, the oxidation peak current was proportional to SA concentration in the range of 0.08 mu M to 150 mu M with a detection limit of 0.03 mu M (S/N = 3). Moreover, the modified electrode showed high selectivity, good stability and reproducibility.