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

An enzyme-free electrochemical sensor for the detection of hydrogen peroxide was developed using a three-dimensional ordered macroporous (3DOM) gold film modified electrode, which was obtained via the 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 hydrogen peroxide, whose catalytic current was linear with hydrogen peroxide concentration ranging from 1 x 10(-6) to 5.5 x 10(-5) mol/L and 8 x 10(-5) to 1.3 x 10(-3) mol/L with a detection limit of 3.3 x 10(-7) mol/L (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.