▎ 摘　　要

Sensitive, reliable determination of bromate is highly significant and desirable in environmental monitoring field. Herein, molybdenum disulfide-graphene aerogel (MoS2-GA) is prepared by hydrothermal method, and further modified on glassy carbon electrode (GCE) to serve as a substrate for hemoglobin (Hb) immobilization. After the coating of PEDOT:PSS membrane, the Hb based sensing platform (PEDOT:PSS/Hb/MoS2-GA/GCE) is obtained. The direct electrochemistry of Hb is achieved, exhibiting a typical pair of obvious redox peaks. PEDOT:PSS/Hb/MoS2-GA/GCE displays outstanding electrocatalytic activity towards bromate reduction with catalytic mechanism discussed. Consequently, a sensitive electrochemical sensor for bromate determination is established, with a wide linear range from 1.0 mu mol/L to 10.0 mmol/L, accompanying a low limit of detection (0.35 mu mol/L). The sensor can be successfully applied for bromate detection in water samples with the characteristics of promising sensitivity, selectivity, and repeatability.