Electrocatalytic Oxidation of Hydrogen Peroxide Based on the Shuttlelike Nano-CuO-Modified Electrode

Abstract EN

CuO nanocrystals were prepared with hydrothermal synthesis method.

The morphology of the nano-CuO was characterized by scanning electron microscopy.

The prepared shuttlelike CuO nanocrystals were modified to glass carbon electrode (GCE) to form nano-CuO/GCE modified electrode.

The obtained modified electrode showed an excellent electrocatalytic property towards hydrogen peroxide in 0.01 M NaOH containing 0.09 M KCl electrolyte.

Under the optimal experiment conditions, the electrocatalytic response current of this sensor was proportional to the H2O2 concentration in the range of 0.02 μM~250 μM with a detection limit down to 7 nM (signal/noise = 3).

The sensitivity was calculated to be 227 μA/mM.

The H2O2 sensor exhibited low detection limit, fast response time, and good reproducibility and could be applied to determine hydrogen peroxide.