Direct epitaxial growth of nickel phosphide nanosheets on nickel foam as self-support electrode for efficient non-enzymatic glucose sensing
C. A. Wang, Bo Han, Jia Li, Qiang Gao, Kaisheng Xia, Chenggang Zhou
Abstract
Abstract Design and develop of cost-effective non-enzymatic electrode materials is of great importance for next generation of glucose sensors. In this work, we report a high-performance self-supporting electrode fabricated via direct epitaxial growth of nickel phosphide on Ni foam (Ni 2 P/NF) for nonenzymatic glucose sensors in alkaline solution. Under the optimal conditions, the uniform Ni 2 P nanosheets could be obtained with an average thickness of 80 nm, which provides sufficient active sites for glucose molecules. As a consequence, the Ni 2 P/NF electrode displays superior electrochemistry performances with a high sensitivity of 6375.1 μ A mM −1 cm −2 , a quick response about 1 s, a low detection limit of 0.14 μ M (S/N = 3), and good selectivity and specificity. Benefit from the strong interaction between Ni 2 P and NF, the Ni 2 P/NF electrode is also highly stable for long-term applications. Furthermore, the Ni 2 P/NF electrode is capable of analyzing glucose in human blood serum with satisfactory results, indicating that the Ni 2 P/NF is a potential candidate for glucose sensing in real life.