Green synthesized Au-Ag bimetallic nanoparticles modified electrodes for the amperometric detection of hydrogen peroxide

Simple and eco-friendly electro deposition method was employed for the fabrication of Au-Ag bimetallic nanoparticles modified glassy carbon electrode. Nano Au-Ag film modified glassy carbon electrode surface morphology has been examined using atomic force microscopy. Electrodeposited Au-Ag bimetallic nanoparticles were found in the average size range of 15-50 nm. The electrochemical investigations of nano Au-Ag/1-butyl-3-methylimidazolium tetrafluoroborate-nafion film have been carried out using cyclic voltammetry and electrochemical impedance spectroscopy. The nano Au-Ag/1-butyl-3- methylimidazolium tetrafluoroborate-nafion film modified glassy carbon electrode holds the good electrochemical behavior and stability in pH 7.0 phosphate buffer solutions. The nano Au-Ag/1-butyl-3-methylimidazolium tetrafluoroborate-nafion modified glassy carbon electrode was successfully employed for the detection of H₂O₂ in the linear range of 1-250 μM in lab samples, and 1 × 10^-3-2 × 10 ^-2 M in real samples, respectively.