Electrocatalytic oxidation behavior of NADH at Pt/Fe3O4/reduced-graphene oxide nanohybrids modified glassy carbon electrode and its determination

Mater Sci Eng C Mater Biol Appl. 2016 Oct 1:67:237-246. doi: 10.1016/j.msec.2016.05.011. Epub 2016 May 6.

Abstract

We have developed Pt/Fe3O4/reduced-graphene oxide nanohybrids modified glassy carbon (Pt/Fe3O4/RGO/GC) electrode as a novel system for the preparation of electrochemical sensing platform. Characterization of as-made composite was determined using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM), atomic force microscopy (AFM) and energy-dispersive analysis of X-ray (EDAX) where the Pt, Fe, Si, O and C elements were observed. The Pt/Fe3O4/RGO/GC electrode was characterized by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Due to the synergistic effect between Pt, Fe3O4 and RGO, the nanohybrid exhibited excellent performance toward dihydronicotinamide adenine dinucleotide (NADH) oxidation in 0.1M phosphate buffer solution, pH7.0, with a low detection limit of 5nM.

Keywords: Chemical modified electrode; Dihydronicotinamide adenine dinucleotide; Electrocatalytic; Pt/Fe(3)O(4)/RGO.

MeSH terms

  • Catalysis
  • Electricity
  • Electrochemistry / methods*
  • Electrodes
  • Ferric Compounds / chemical synthesis
  • Ferric Compounds / chemistry*
  • Glass / chemistry*
  • Graphite / chemical synthesis
  • Graphite / chemistry*
  • Hydrogen-Ion Concentration
  • Microscopy, Atomic Force
  • NAD / analysis*
  • Nanoparticles / chemistry
  • Nanoparticles / ultrastructure
  • Oxidation-Reduction
  • Platinum / chemistry*
  • Propylamines / chemistry
  • Silanes / chemistry
  • Spectrometry, X-Ray Emission
  • Spectroscopy, Fourier Transform Infrared
  • X-Ray Diffraction

Substances

  • Ferric Compounds
  • Propylamines
  • Silanes
  • NAD
  • ferric oxide
  • Platinum
  • Graphite
  • amino-propyl-triethoxysilane