A nonenzymatic hydrogen peroxide sensor based on Au–Ag nanotubes and chitosan film

•A simple and sensitive Au–Ag NTs modified GCE electrode for H2O2 determination.•The Au–Ag NTs film possessed good electrocatalytic activity towards H2O2.•A good application prospect attributed to H2O2 determination in practical samples.•The simplicity and low expense of fabrication made the sensor more attractive.

In this paper, a nonenzymatic hydrogen peroxide sensor based on Au–Ag nanotubes and chitosan film has been fabricated. The Au–Ag nanotubes were characterized by X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The electrochemical behaviors of the biosensor were characterized by cyclic voltammetry. Under the optimal conditions, a wider linear range (0.008–1.3 mM) and a low detection limit (3.18 μM) were achieved based on the Au–Ag nanotubes for accurate detection of H2O2. In addition, this sensor also exhibited good selectivity and reproducibility.

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