Co-MOF nanosheet array: A high-performance electrochemical sensor for non-enzymatic glucose detection

•Co-MOF nanoarray was hydrothermally developed on nickel foam.•Co-MOF/NF exhibits high electrocatalytic activity for glucose electro-oxidation.•Co-MOF/NF acts as a superior sensor for non-enzymatic glucose detection. It is important to construct and develop non-noble-metal nanoarray architecture for sensitive and selective detection of glucose. In this paper, we testify the hydrothermal synthesis of Co-MOF nanosheet array on nickel foam from aqueous Co2+ and terephthalic acid. The resulting Co-MOF array on Ni foam (Co-MOF/NF) exhibits strong activity for glucose oxidation electrocatalysis in alkaline media. As a promising enzymatic-free sensing, the speedy amperometric response of < 5 s, high sensitivity of 10,886 μA mM−1 cm-2 and low detection limit of 1.3 nM (signal/noise = 3) are obtained in the Co-MOF/NF. Our study shows that the material possesses long-time stability and great reproducibility and may be used for the glucose detection in human blood serum and fruit juice.