高等学校化学学报 ›› 2016, Vol. 37 ›› Issue (1): 142-148.doi: 10.7503/cjcu20150369

• 物理化学 • 上一篇    下一篇

硼掺杂金刚石薄膜电极上二氯酚的电化学阻抗谱研究

吕江维1(), 曲有鹏2, 冯玉杰3, 刘峻峰3   

  1. 1. 哈尔滨商业大学药学院, 哈尔滨 150076
    2. 哈尔滨工业大学生命科学与技术学院, 哈尔滨 150080
    3. 哈尔滨工业大学城市水资源与水环境国家重点实验室, 哈尔滨 150090
  • 收稿日期:2015-05-08 出版日期:2016-01-10 发布日期:2015-12-20
  • 基金资助:
    国家自然科学基金(批准号: 51308171, 51209061)、 黑龙江省教育厅科学技术研究项目(批准号: 12541185)和中央高校基本科研业务费专项基金(批准号: HIT.NSRIF.2015090)资助

Electrochemical Impedance Spectroscopy of Dichlorophenols at Boron-doped Diamond Electrodes

LÜ Jiangwei1,*(), QU Youpeng2, FENG Yujie3, LIU Junfeng3   

  1. 1. School of Pharmacy, Harbin University of Commerce, Harbin 150076, China
    2. School of Life Science and Technology, Harbin Institute of Technology, Harbin 150080, China
    3. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
  • Received:2015-05-08 Online:2016-01-10 Published:2015-12-20
  • Contact: LÜ Jiangwei E-mail:pp198259@163.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.51308171, 51209061), the Science and Technology Project of Heilongjiang Province Education Department, China(No.12541185) and the Fundamental Research Fund for the Central Universities, China(No.HIT.NSRIF.2015090)

摘要:

以2,4-二氯酚(2,4-DCP)和2,6-二氯酚(2,6-DCP)为模型污染物, 采用循环伏安法和电化学阻抗谱研究了硼掺杂金刚石(BDD)电极上2种氯酚的电催化氧化过程. 结果表明, 2,4-DCP和2,6-DCP的氧化电位分别为1.55和1.62 V. 等效电路拟合结果表明, 当极化电位由开路电位提高至1.5 V时, 2种氯酚的电荷转移电阻均有明显下降, 反应控制步骤为扩散控制步骤. 与2,6-DCP相比, 2,4-DCP在BDD电极上更容易发生直接电化学氧化.

关键词: 硼掺杂金刚石, 循环伏安, 电化学阻抗谱, 二氯酚, 电催化

Abstract:

Cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS) were used to investigate the electrocatalytic process of boron-doped diamond(BDD) electrode with 2,4-dichlorophenol(2,4-DCP) and 2,6-dichlorophenol(2,6-DCP) as target pollutants. Results showed that the oxidation potential of the 2,4-DCP and 2,6-DCP were 1.55 and 1.62 V, respectively. Equivalent circuit simulation results showed that the charge transfer resistance for the two DCPs were both decreased when the polarization potential increased from open circuit potential to 1.5 V, indicating that electrocatalytic oxidation was favored by increasing potential. The diffusion step was the control step at oxidation potential. The indirect electrochemical oxidation of 2,4-DCP occurred more easily at BDD electrode than 2,6-DCP.

Key words: Boron-doped diamond, Cyclic voltammetry, Electrochemical impedance spectroscopy, Dichlorophenol, Electrocatalysis

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