Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (09): 2405-2409.doi: 10.3866/PKU.WHXB20100841

• ELECTROCHEMISTRY • Previous Articles     Next Articles

Comparative Study of Electrochemical Performances of Three Carbon-Based ElectrodeMaterials

ZHOU Yan-Li1, ZHI Jin-Fang2, ZHANG Xiang-Fei1, XU Mao-Tian1   

  1. 1. Department of Chemistry, Shangqiu Normal University, Shangqiu 476000, Henan Province, P. R. China;
    2. Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
  • Received:2010-04-18 Revised:2010-05-18 Published:2010-09-02
  • Contact: ZHOU Yan-Li, XU Mao-Tian E-mail:xumaotian@sqnc.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20775047), International Cooperative Project Foundation of Science and Technology Department of Henan Province, China (084300510075), and Youth Foundation of Shangqiu Normal University, China (009QN08).

Abstract:

The electrochemical properties of three carbon-based electrodes including boron-doped nanocrystalline diamond (BDND), boron-doped microcrystalline diamond (BDMD), and glassy carbon (GC) were compared. We used scanning electron microscopy to characterize the two diamond electrodes and the grain sizes of the BDMD and BDND films were 1-5 μm and 20-100 nm, respectively. The phase composition was characterized by Raman spectroscopy and high-quality BDMD and BDND films were formed by hot-filament chemical vapor deposition. Cyclic votammograms for 0.5 mol·L-1 H2SO4 showed that the potential windows for the BDND and BDMD electrodes were 3.3 and 3.0 V, respectively. The potential windows were much wider than that of the GC electrode (2.5 V). The cyclic voltammograms and Nyquist plots of the impedance measurements for [Fe(CN)6]3-/[Fe(CN)6]4- show peak to peak separations (ΔEp) of 73, 92, and 112 mV and electron transfer resistances (Ret) of (98依5), (260依19), and (400依25) Ωfor the BDND, BDMD, and GC electrodes, respectively. We also investigated the oxidation of 0.1 mmol·L-1 bisphenol A (BPA) on the three carbon-based electrodes. The above-mentioned electrochemical results reveal that the two diamond electrodes have wider potential windows, better reversibility, faster electron transfer, and higher stability than the GC electrode. Additionally, the BDND electrode shows better electrochemical properties than the BDMD electrode.

Key words: Electrochemical property, Boron-doped nanocrystalline diamond, Boron-doped microcrystalline diamond, Glassy carbon, Electrode

MSC2000: 

  • O646