▎ 摘　　要

A superoxide anion radical (O-2(center dot-)) nonenzymatic electrochemical sensor based on PtRuCu ternary alloy nanoparticles/electrochemically reduced graphene oxide (ERGO) composite modified glassy carbon electrode (PtRuCu/ERGO/GCE) was developed. ERGO and PtRuCu/ERGO composites were characterized by scanning electron microscopy. The prepared PtRuCu/ERGO/GCE showed remarkable performance toward the electrocatalytic reduction of (O-2(center dot-)). The sensor possessed a high sensitivity of 1725 A mu . mM(-1) . cm(-2), a wide linear range of 7.5-330 mu M (R-2 =0.993) and a low detection limit of 0.7 mu M (S/N = 3), as well as excellent selectivity, reproducibility and stability, which can be attributed to the synergistic effect of ERGO and PtRuCu ternary alloy nanoparticles. Therefore, the prepared sensor is promising for electrochemical determination of O-2(center dot-).