3D CoxP@NiCo-LDH heteronanosheet array: As a high sensitivity sensor for glucose

The development of an efficient and convenient non-enzymatic glucose (Glu) sensor is an extremely attractive and challenging subject. In this work, a 3D cobalt phosphide coated nickel–cobalt layered double hydroxide heteronanosheet array on Ni foam (Cox[email protected] NSA/NF) was constructed using electrodeposition and high-temperature phosphating technology. Its unique heteronanosheet array structure and synergistic effect resulting in excellent electrochemical activity for Glu. The response time of the sensor is ultra-fast (<5 s), with a high sensitivity of 5732.1 µA·mM−1 cm−2, a wide linear range of 1 µM–3 mM, and a limit of detection (LOD) of 0.60 µM (S/N = 3). The detection of Glu in human serum also shows satisfactory reliability. This work provides more design strategies for the application of heterostructure electrocatalysts in analytical sensing.