MoS2 as connector inspired high electrocatalytic performance of NiCo2O4 nanoplates towards glucose

A novel MoS 2 -NiCo 2 O 4 architecture with highly sensitive determination toward glucose is constructed successfully in this work. MoS 2 nanosheets are regarded as clever connectors to connect NiCo 2 O 4 nanoplates together, which would inspire the electrocatlytic performance of NiCo 2 O 4 nanoplates acted as active sites greatly. The interesting nanostructure and composition were confirmed by scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy, etc. Rational incorporation of MoS 2 as an electron collector can promote the formation of conductive chains among the NiCo 2 O 4 nanoplates, accompanying with inhibiting of NiCo 2 O 4 aggregation. The conductive path can accelerate the charge transfer significantly. The MoS 2 -NiCo 2 O 4 modified GCE exhibits enhanced electrocatalytic activity toward the oxidation of glucose, compared with NiCo 2 O 4 nanoplates. At a potential of +0.418   V, the fabricated biosensor demonstrates a wide detection range with high sensitivity (1748.58   μAmM −1 cm −2 ) and a low detection limit of 0.152   μM. It also shows anti-interference for ascorbic acid, uric acid, dopamine and chloride ion. Besides, it owns good reproducibility, repeatability and long-term stability. Excellent catalytic oxidation performance for glucose supports that MoS 2 -NiCo 2 O 4 hybrid is an outstanding and promising electrode material toward glucose biosensor.