MoO3 nanoparticles based electrodes as novel electrochemical sensors for the detection of H2O2

A rapid and facile method for the detection of hydrogen peroxide (H2O2) in chemical reactions has been reported using molybdenum oxide Nanoparticles (MoO3 NPs) synthesized via an eco-friendly and economical solution combustion route using Centella Asiatica leaf powder. The formation of porous agglomerated NPs has been confirmed by subjecting the synthesized material to various analytical and spectroscopic techniques to understand their size, morphology, and nature. In this study, MoO3 NPs-based electrode has been fabricated and its electrochemical sensing capabilities have been investigated. Electrochemical investigation of hydrogen peroxide exhibits an increase in the peak current response at pH 13. The cyclic voltammetry (CV) results indicate an appreciable reversibility of the electrode reaction. The anodic and cathodic peaks show a greater inclination towards the positive and negative sides with a significant development in the reversibility of the oxidation and reduction states. These findings open up new avenues for the exploration of various other metal oxide based NPs as sensors for the detection of chemically toxic substances.