期刊
ELECTROANALYSIS
卷 20, 期 20, 页码 2212-2216出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.200804312
关键词
Carbon nanotubes; Glucose; Platinum-ruthenium nanoparticles; Electroanalysis; Nonenzymatic biosensor
资金
- high technology research program
- Ministry of Science and Technology (MOST) of China [2008AA06Z311]
- National Natural Science Foundation of China [20773041]
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 mu A cm(-2) mM(-1), low detection limit of 2.5 x 10(-5) M, and fast response time of 10 s were achieved for the detection of glucose at the PtRu/MWNTs electrode.
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