Detection of hydrogen peroxide at a palladium nanoparticle-bilayer graphene hybrid-modified electrode

We report a nonenzymatic H2O2 sensor based on a glassy carbon electrode modified with bilayer graphene films (BGFs) that were decorated with well-defined Pd nanoparticles. The BGFs were synthesized with a chemical vapor deposition process, and the Pd nanoparticle films were produced by gas phase cluster beam deposition. The BGFs provide great accessible active surface area and excellent conductive interfaces for electron transfer, which largely enhance the electrocatalytic performance of the modified electrodes. A rapid response time of less than 3 s and a wide linear range from 4 μM to 13.5 mM was exhibited in the amperometric detection of H2O2.