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Electrocatalytic Oxidation of Glucose at Carbon Nanotubes Supported PtRu Nanoparticles and Its Detection
Author(s) -
Li LiHua,
Zhang WeiDe,
Ye JianShan
Publication year - 2008
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.200804312
Subject(s) - ascorbic acid , cyclic voltammetry , carbon nanotube , electrode , detection limit , nanocomposite , electrocatalyst , nanoparticle , materials science , electrochemistry , biosensor , amperometry , transmission electron microscopy , inorganic chemistry , chemical engineering , nuclear chemistry , chemistry , nanotechnology , chromatography , food science , engineering
PtRu nanoparticles were supported on multiwall carbon nanotubes (MWNTs), which were further fabricated as an electrode for nonenzymatic glucose sensing. Transmission electron microscope and X‐ray diffraction patterns were used for characterization of the PtRu nanoparticles on MWNTs. Cyclic voltammetry and chronopotentiometry were applied to investigate the performance of the PtRu/MWNTs nanocomposite electrode for nonenzymatic oxidation of glucose. The PtRu/MWNTs electrode shows high electrocatalytic activity towards the oxidation of glucose in 0.1 M NaOH solution and thus can be used to selectively detect glucose. Under the optimal potential (+0.55 V vs. Ag/AgCl), the biosensor effectively performs a selective electrochemical analysis of glucose in the presence of common interferents, such as ascorbic acid (AA), dopamine (DP) and uric acid (UA). Wide linear calibration ranging from 1 mM to 15 mM, high sensitivity of 28.26 μA cm −2 mM −1 , low detection limit of 2.5×10 −5 M, and fast response time of 10 s were achieved for the detection of glucose at the PtRu/MWNTs electrode.