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

Controllable synthesis of CuCo2S4 was reported for electrochemical sensing of H2O2. It is the first time that CuCo2S4 was explored as electrocatalyst for H2O2 oxidation. A facile hydrothermal approach is developed for the shape-controlled synthesis of CuCo2S4 by just changing the type of metal precursor. The structures, compositions and electrochemical properties of CuCo2S4 were studied. Electrochemical studies showed that flower-like CuCo2S4 with large surface area and three-dimensional porous structure exhibited excellent electrocatalytic activity toward H2O2 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 CuCo2S4 was a promising efficient sensing material for electrochemical sensing of H2O2.