Preparation and comparison of colloid based Ni50Co50(OH)2/BOX electrocatalyst for catalysis and high performance nonenzymatic glucose sensor

A novel nonenzymatic glucose sensor based on Ni50Co50(OH)(2)/BOX/FTO was constructed with high sensitivity and excellent selectivity when compared with Ni(OH)(2)/FTO and Co(OH)(2)/FTO. Ni50Co50(OH)(2)/BOX/FTO glucose sensor with nanometric size was made by using a simple colloidal method. The morphological demonstration of nanomaterials/nanoparticles were characterized by using TEM (transmission electron microscopy), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), XRD and Raman, showing homogenously immersed particles with a size of less than 50 nm. Electrochemical measurements showed that colloidal based Ni50Co50(OH)(2)/BOX/FTO electrocatalyst possessed good catalysis capacity with low onset potential and excellent catalytic activity toward glucose. Nanocomposite has excellent sensitivity of 927.3 mu A mM(-1) cm(-2), a wide linear range of 0.005 mM to 10.83 mM and LOD (low detection limit) of 0.017 mu M (S/N = 3). Nanocomposites were applied for glucose determination in blood serum samples with standard addition; promising results were obtained with a standard deviation of +/- 1 to 2.5%. Nanocomposite show good reproducibility or recovery towards glucose. Ni50Co50(OH)(2)/BOX/FTO provide a new easy platform for electrochemical determination of glucose as nonenzymatic sensor.