A Highly Sensitive Non-Enzymatic Hydrogen Peroxide Sensor based on Palladium-Gold Nanoparticles

Abstract

Here a simple strategy was employed to fabricate a hydrogen peroxide (H ₂ O ₂ ) sensor based on gold nanoparticles and palladium nanoparticles onto a tungsten wire. The electrochemical activities of the bimetallic nanoparticles decorated electrode were characterized by the voltammetry and amperometry. The decorated electrode showed excellent catalytic activity towards the H ₂ O ₂ reduction. The fabricated electrode demonstrated a good linear range, fast response time, good reproducibility, and a sensitivity of 0.317 mA mM ^-1 cm ^-2 for H ₂ O ₂ detection. In addition, it also showed good anti-interference capability towards common interfering analytes. Thereby, the fabricated sensor has the potential to be used as a simple, rapid, and cost-effective non-enzymatic sensor.