Prussian blue-modified nanoporous gold film electrode for amperometric determination of hydrogen peroxide

• Electrocatalytic reduction of H2O2 on Prussian blue modified nanoporous gold electrode.
• Characterization of of the PB/NPGF morphology using scanning electron microscopy.
• Investigation of pH and the scan rates effects on the voltammetric responses.
• Remarkably good stability, repeatability and selectivity.

In this manuscript, the electrocatalytic reduction of hydrogen peroxides on Prussian blue (PB) modified nanoporous gold film (NPGF) electrode is described. The PB/NPGF is prepared by simple anodizing of a smooth gold film followed by PB film electrodeposition method. The morphology of the PB/NPGF electrode is characterized using scanning electron microscopy (SEM). The effect of solution pH and the scan rates on the voltammetric responses of hydrogen peroxide have also been examined. The amperometric determination of H2O2 shows two linear dynamic responses over the concentration range of 1 μM–10 μM and 10 μM–100 μM with a detection limit of 3.6 × 10− 7 M. Furthermore, this electrode demonstrated good stability, repeatability and selectivity remarkably.