title: Electrocatalytic reduction of H2O2 on thiolate graphene oxide covalently to bonded palladium nanoparticles.
abstract: The electrocatalytic reduction of hydrogen peroxide on thioalted graphene oxide (t-GO) covalent bonded to palladium nanoparticles was used as the basis of an H2O2 biosensor. Poly (diallydimethylammonium chloride)-coated t-GO-Pd on glassy carbon electrodes was easily and quickly prepared and gave sensitive measurements of H2O2 concentration. The Pd nanoparticles covalently bonded to the thiolated graphene oxide were characterized by transmission electron microscopy, X-ray photoelectron spectroscopy, and energy dispersive X-ray spectroscopy. Comparable results for H2O2 determination were obtained from cyclic voltammetric and amperometric measurements. The proposed H2O2 biosensor exhibited a wide linear range of 10 microM to 10 mM, and a low detection limit of 0.22 microM (S/N = 3), at an applied potential of -0.1 V by the amperometric method.
authors.affiliation: Department of Chemistry and Institute of Basic Science, Chonnam National University, Gwangju 500-757, Korea.
authors.forename: Jung-Min
authors.initials: JM
authors.lastname: You
authors.forename: Daekun
authors.initials: D
authors.lastname: Kim
authors.forename: Seungwon
authors.initials: S
authors.lastname: Jeon