Citation:
GAN Ning, WANG Lu-Yan, LI Tian-Hua, WANG Feng, JIANG Qian-Li. Preparaton and Electrocatalytic Activities of Nano Pt/Dimercaptosuccinic Amide Copper Modified Electrode[J]. Acta Physico-Chimica Sinica,
;2008, 24(05): 915-920.
doi:
10.3866/PKU.WHXB20080532
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Nano Pt/dimercaptosuccinic amide copper (II) (CuL) modified electrode (Au/CuL/nano Pt CME) was prepared by electrodepositing nano crystalline Pt on the surface of CuL monolayer, which was self-assembled on Au electrode (Au/CuL CME). The electrode’s electrochemical response was studied by cyclic voltammetry (CV) and its surface was characterized by scanning electron micrograph (SEM), atomic force microscope (AFM), Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectrum(XPS). The results indicated that the biosensor displayed excellent electrocatalytical response to the reduction of H2O2 in 0.02 mol·L-1 PBS(pH=6.0). The electrode responsed to H2O2 in the concentration range of 0.00125-0.16mmol·L-1with detection limit of 0.3 μmol·L-1 (signal/noise ratio was 3). Meanwhile, the electrode showed od sensitivity (0.312 mA·cm-2·mmol-1·L in amperometric measurements), rapid response time (4.3 s), and reproducibility for long-termuse (the variation coefficients were 3.1%and 3.9% (n=10) at 46 μmol·L-1 and 2.8 mmol·L-1 H2O2, respectively; the current maintained 95%for at least more than 70 days to 10 μmol·L-1 H2O2).
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