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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