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Gold Nanoparticles Electrodeposited on Ordered Mesoporous Carbon as an Enhanced Material for Nonenzymatic Hydrogen Peroxide Sensor
Author(s) -
Wang Lixia,
Bo Xiangjie,
Bai Jing,
Zhu Liande,
Guo Liping
Publication year - 2010
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.201000263
Subject(s) - x ray photoelectron spectroscopy , hydrogen peroxide , scanning electron microscope , materials science , colloidal gold , mesoporous material , nanoparticle , chemical engineering , detection limit , substrate (aquarium) , amperometry , nuclear chemistry , nanotechnology , electrochemistry , chemistry , catalysis , electrode , organic chemistry , chromatography , composite material , oceanography , geology , engineering
A facile and controllable electrodeposition method was developed to directly attach gold nanoparticles (GNPs) on ordered mesoporous carbon (OMC). The GNPs on OMC substrate were characterized by scanning electron microscopy (SEM), X‐ray diffraction (XRD) and X‐ray photoelectron spectrometer (XPS), respectively. A nonenzymatic hydrogen peroxide (H 2 O 2 ) sensor was fabricated on GNPs‐OMC/GCE. The sensor demonstrated a fast amperometric response (2.5 s), a wide linear range toward H 2 O 2 concentrations between 2.0×10 −6 and 3.92×10 −3 M ( R =0.999), and a low detection limit of 0.49 µM ( S / N =3). Moreover, it exhibited good reproducibility and long‐term stability. The excellent electrocatalytical activity might be attributed to the synergistic effect of OMC and GNPs.