Electrochemical hydrogen peroxide sensor based on carbon supported Cu@Pt core-shell nanoparticles.

The Cu@Pt/C nanocomposites have been synthesized via two-step reduction method. Electrochemical observations showed that the Cu@Pt/C had better electrocatalytic activity for the reduction of hydrogen peroxide than Pt/C, with a wide linear range between 0.50µM and 32.56mM, a high sensitivity of 351.3µAmM-1cm-2, and a low detection limit of 0.15µM (signal/noise=3). Furthermore, the sensor based on Cu@Pt/C has potential applications due to its excellent long-time stability, good reproducibility and acceptable selectivity.