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Electrochemically Prepared Three‐dimensional Porous Nitrogen‐doped Graphene Modified Electrode for Non‐enzymatic Detection of Hydrogen Peroxide
Author(s) -
Qi Yamin,
Bai Jie,
Ding Xiaoteng,
Zhang HuiMin
Publication year - 2017
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201700142
Subject(s) - graphene , materials science , electrode , polypyrrole , x ray photoelectron spectroscopy , detection limit , electrochemistry , scanning electron microscope , palladium hydrogen electrode , raman spectroscopy , analytical chemistry (journal) , reversible hydrogen electrode , chemical engineering , working electrode , nanotechnology , chemistry , composite material , chromatography , engineering , physics , optics
A facile and green electrochemical method for the fabrication of three‐dimensional porous nitrogen‐doped graphene (3DNG) modified electrode was reported. This method embraces two consecutive steps: First, 3D graphene/polypyrrole (ERGO/PPy) composite was prepared by electrochemical co‐deposition of graphene and polypyrrole on a gold foil. Subsequently, the ERGO/PPy composite modified gold electrode was annealed at high temperature. Thus 3DNG modified electrode was obtained. Scanning electron microscopy (SEM), X‐ray photoelectron spectroscopy (XPS) and Raman spectroscopy were used to characterize the structure and morphology of the electrode. The electrode exhibits excellent electroanalytical performance for the reduction of hydrogen peroxide (H 2 O 2 ). By linear sweep voltammetric measurement, the cathodic peak current was linearly proportional to H 2 O 2 concentration in the range from 0.6 μM to 2.1 mM with a sensitivity of 1.0 μA μM −1 cm −2 . The detection limit was ascertained to be 0.3 μM. The anti‐interference ability, reproducibility and stability of the electrode were carried out and the electrode was applied to the detection of H 2 O 2 in serum sample with recoveries from 98.4 % to 103.2 %.