Nonenzymatic Hydrogen Peroxide Sensor Based on Three-dimensional Ordered Macroporous Gold Film Modified Electrode

A nonenzymatic electrochemical sensor for the detection of hydrogen peroxide (H2O2) was developed using a three-dimensional ordered macroporous (3DOM) gold film modified electrode, which was prepared using an inverted colloidal-crystal template technique and electrochemical deposition method. The modified electrode was characterized by cyclic voltammetry (CV). Under the optimized conditions, the sensor showed a wide dynamic range for the detection of H2O2, and the catalytic current was linear with the concentration of H2O2 ranging from 1 × 10−6 M to 5.5 × 10−5 M and 8 × 10−5 M to 1.3 × 10−3 M with a detection limit of 3.3 × 10−7 M estimated at a signal-to-noise ratio of 3. In addition, the sensor exhibited good reproducibility and stability and might have potential applications in the fabrication of nonenzymatic sensor.