物理化学学报 >> 2010, Vol. 26 >> Issue (09): 2405-2409.doi: 10.3866/PKU.WHXB20100841

电化学 上一篇    下一篇

三种碳基电极材料的电化学性质对比研究

周艳丽1, 只金芳2, 张向飞1, 徐茂田1   

  1. 1. 商丘师范学院化学系,河南商丘476000;
    2. 中国科学院理化技术研究所, 中国科学院光化学转换与功能材料重点实验室,北京100190
  • 收稿日期:2010-04-18 修回日期:2010-05-18 发布日期:2010-09-02
  • 通讯作者: 周艳丽, 徐茂田 E-mail:xumaotian@sqnc.edu.cn
  • 基金资助:

    国家自然科学基金(20775047),河南省科技厅国际合作项目基金(084300510075)和商丘师范学院青年基金(009QN08)资助

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).

摘要:

对硼掺杂纳米金刚石(BDND), 硼掺杂微米金刚石(BDMD)和玻碳(GC)电极的电化学性质做了对比研究. 利用扫描电子显微镜表征了BDMD 和BDND电极, 其表面粒子大小分别为1-5 μm 和20-100 nm. 利用Raman 光谱对两种金刚石薄膜的成分进行了表征,结果表明利用热丝化学气相沉积法得到了高质量的BDND 和BDMD 薄膜. 采用0.5 mol·L-1 H2SO4溶液测定了三种电极的电化学窗口, BDND 和BDMD 电极的电化学窗口分别为 3.3 和3.0 V,远比GC电极(2.5 V)的要宽. [Fe(CN)6]3-/[Fe(CN)6]4-溶液的循环伏安和交流阻抗测定表明,在BDND、 BDMD 和GC 电极上的峰间距(ΔEp)分别为73、92 和112 mV, 且其电子传递电阻(Ret)分别为(98依5)、(260依19)和 (400依25)Ω. 我们也研究了0.1 mmol·L-1双酚A 在三种电极上的电化学氧化行为. 上述的电化学测定结果表明, 两种金刚石电极均比GC电极表现出了更宽的电化学窗口、更好的电化学可逆性质、更快的电子传递速度和更 高的电化学稳定性, 更为重要的是与BDMD 相比BDND 的电化学性质有进一步的提高.

关键词: 电化学性质, 硼掺杂纳米金刚石, 硼掺杂微米金刚石, 玻碳, 电极

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