Shape-controlled synthesis of CuCo2S4 as highly-efficient electrocatalyst for nonenzymatic detection of H2O2

Controllable synthesis of CuCo 2 S 4 was reported for electrochemical sensing of H 2 O 2 . It is the first time that CuCo 2 S 4 was explored as electrocatalyst for H 2 O 2 oxidation. A facile hydrothermal approach is developed for the shape-controlled synthesis of CuCo 2 S 4 by just changing the type of metal precursor. The structures, compositions and electrochemical properties of CuCo 2 S 4 were studied. Electrochemical studies showed that flower-like CuCo 2 S 4 with large surface area and three-dimensional porous structure exhibited excellent electrocatalytic activity toward H 2 O 2 oxidation and an excellent analytical performances with a high sensitivity of 857.1   μA   mM −1   cm −2 , a low detection limit of 0.084   μM (S/N   =   3) and a wide linear range of 4 orders of magnitude were achieved. These results demonstrated that CuCo 2 S 4 was a promising efficient sensing material for electrochemical sensing of H 2 O 2 .