Molybdenum disulfide nanosheets supported Au-Pd bimetallic nanoparticles for non-enzymatic electrochemical sensing of hydrogen peroxide and glucose

Abstract

The molybdenum disulfide (MoS2) nanosheets supported Au-Pd bimetallic nanoparticles were synthesized using a facile thermal co-reduction method. The Au-Pd/MoS2 nanocomposites showed good electrocatalytic activities toward the reduction of hydrogen peroxide (H2O2) in neutral solution and the oxidation of glucose in alkaline solution, attributed to the synergistic effects of the Au-Pd bimetallic nanoparticles and MoS2 nanosheets. The fabricated non-enzymatic electrochemical sensors exhibited the linear responses of H2O2 and glucose in the concentration ranges of 0.8μM–10mM and 0.5–20mM with the detection limits of 0.16μM and 0.40mM (S/N=3), respectively, together with good stability and reproducibility. The Au-Pd/MoS2 nanocomposites provide new potential materials for the development of other non-enzymatic sensors.