Novel Nonenzymatic Hydrogen Peroxide Sensor Based on Ag/Cu 2 O Nanocomposites

The nanocomposites of Ag nanoparticles supported on Cu 2 O were prepared and used for fabricating a novel nonenzymatic H 2 O 2 sensor. The morphology and composition of the nanocomposites were characterized using the scanning electron microscope (SEM), transmission electron microscope (TEM), energy‐dispersive X‐ray spectrum (EDX) and X‐ray diffraction spectrum (XRD). The electrochemical investigations indicate that the sensor possesses an excellent performance toward H 2 O 2 . The linear range is estimated to be from 2.0 μM to 13.0 mM with a sensitivity of 88.9 μA mM −1 cm −2 , a response time of 3 s and a low detection limit of 0.7 μM at a signal‐to‐noise ratio of 3. Additionally, the sensor exhibits good anti‐interference.