In-situ synthesis of metasequoia-leaf-like Cu/Cu2O/Ni(OH)2 on a glassy carbon electrode for efficient non-enzymatic glucose sensing

Abstract

Novel metasequoia-leaf-like Cu/Cu2O/Ni(OH)2 on a glassy carbon electrode (GCE) was used for non-enzymatic glucose detection using an easy, one-step electrodeposition technique. The direct electrodeposition method is conducive to shifting electrons in a binder-free electrode, and increasing the appropriate deposition voltage can obtain material in 15 s. Furthermore, the metasequoia-leaf-like construction has many dynamic locales for synergistic glucose oxidation, which may advance the dispersion rate of glucose. The research shows that the glucose detection sensitivity of the Cu/Cu2O/Ni(OH)2 electrode is 5737.5 μA mM−1 cm−2 and 4676.0 μA mM−1 cm−2, corresponding to the dynamic linear ranges 1 μM–1 mM and 1 mM–5 mM. In addition, the electrode shows good repeatability, reproducibility, stability, and selectivity. Furthermore, the electrode has been successfully utilized to detect glucose in human serum, confirming that the Cu/Cu2O/Ni(OH)2 electrode can identify glucose.