A novel non-enzymatic hydrogen peroxide sensor based on poly-melamine film modified with platinum nanoparticles

Abstract

A novel hydrogen peroxide (H₂O₂) sensor was fabricated using electrodepositing platinum nanoparticles (PtNPs) on a glassy carbon electrode (GCE) modified with a highly stable poly-melamine film. Since the formation of the poly-melamine layer significantly increased the surface area, high-density PtNPs were homogeneously loaded onto the nanostructured matrix of poly-melamine. The PtNPs/poly-melamine heterostructure-based H₂O₂ sensor synergized the advantages of both the conducting film and the nanoparticle catalyst. This non-enzymatic sensor exhibited high electrocatalytic activity toward the reduction of H₂O₂, and provided a linear response for H₂O₂ in the concentration range from 5 μmol L⁻¹ to 1650 μmol L⁻¹ with a limit of detection (LOD, S/N = 3) of 0.65 μmol L⁻¹. In addition, this proposed H₂O₂ sensor displayed high sensitivity, good anti-interference ability, excellent reproducibility and long-term stability. The excellent analytical performances and facile preparation process made this novel hybrid electrode promising for the development of H₂O₂ sensors.