Highly efficient non‐enzyme glucose sensing by multi‐component CuCoNiFeSi alloy with feather‐like Cu x O

Abstract Extensive research focuses on developing cost‐effective, high‐performance electrochemical non‐enzyme glucose sensors, particularly using nanocomposites of metal oxides and multi‐component alloys. In this paper, a batch of nano‐flaky Cu x O decorated CuCoNiFeSi (Cu x O@Cu/Fe) and CuCoNiSi (Cu x O@Cu) electrode was developed by melt‐spinning following by anodization. According to the results, the sensitivity of Cu x O@Cu/Fe‐25/35 for glucose detection in the lower (0–1 mM) and higher region (1–15 and 15–21 mM) is 2.544, 1.51 and 0.64 mA mM −1 cm −2 , respectively. The limit of detection (LOD) was estimated to be 0.88 μM (signal noise ratio ( S / N ) = 3). Furthermore, the Cu x O@Cu/Fe‐25/35 possessed various merits, such as excellent selectivity, good reusability, acceptable reproducibility, satisfying long‐term stability, and high tolerance to chloride ions. The enhanced performances of the Cu x O@Cu/Fe‐25/35 electrodes are attributable to the feather‐like Cu x O and synergistic effect between Cu x O and Ni(Fe, Co) 3 Si 2 . The work provides a new pathway for detecting all glucose density by electrochemical non‐enzymatic glucose sensor.