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Electrodeposition of flower-like platinum on electrophoretically grown nitrogen-doped graphene as a highly sensitive electrochemical non-enzymatic biosensor for hydrogen peroxide detection

By Erfan Zal Nezhad

Abstract

An efficient non-enzymatic biosensor electrode consisting of nitrogen-doped graphene (N-graphene) and platinum nanoflower (Pt NF) with different N-graphene loadings were fabricated on indium tin oxide (ITO) glass using a simple layer-by-layer electrophoretic and electrochemical sequential deposition approach. N-graphene was synthesized by annealing graphene oxide with urea at 900 degrees C. The structure and morphology of the as-fabricated non-enzymatic biosensor electrodes were determined using X-ray diffraction, field emission electron microscopy, transmission electron microscopy, Raman and X-ray photoelectron spectra. The as-fabricated Pt NF-N-graphene-modified ITO electrodes with different N-graphene loadings were utilized as a non-enzymatic biosensor electrode for the detection of hydrogen peroxide (H2O2). The behaviors of the hybrid electrodes towards H2O2 reduction were assessed using chronoamperometry, cyclic voltammetry and electrochemical impedance spectroscopy analysis. The Pt NF-N-graphene-modified ITO electrode with a 0.05 mgml(-1) N-graphene loading exhibited the lowest detection limit, fastest amperometric sensing, a wide linear response range, excellent stability and reproducibility for the non-enzymatic H2O2 detection, due to the synergistic effect between the electrocatalytic activity of the Pt NF and the high conductivity and large surface area of N-graphene. (C) 2016 Elsevier B.V. All rights reserved.This research is supported by the High Impact Research MoE Grant UM.C/625/1/HIR/MoE/SC/04 from the Ministry of Education Malaysia, UMRG Program RP012A-14SUS, RP038C-15HTM, Grand Challenge GC001C-14SBS and University Malaya Centre for Ionic Liquids (UMCiL). The work was also supported by Global Frontier R&D Program on Center for Wave Energy Control based on Meta materials funded by the National Research Foundation under the Ministry of Science, ICT & Future Planning, Korea (No. 2014063711)

Topics: Nitrogen doped graphene, Electrophoretic deposition, Platinum, Electrodeposition, Hydrogen peroxide, Biosensor
Publisher: ELSEVIER SCIENCE BV
Year: 2016
DOI identifier: 10.1016/j.apsusc.2016.06.045
OAI identifier: oai:repository.hanyang.ac.kr:20.500.11754/100807
Provided by: HANYANG Repository
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