物理化学学报 >> 2001, Vol. 17 >> Issue (12): 1126-1128.doi: 10.3866/PKU.WHXB20011214

研究简报 上一篇    

细胞色素C551在ITO电极上的直接电化学

严捷;李经建;张波;蔡生民   

  1. 北京大学化学与分子工程学院现代物理化学研究中心,北京　100871
  • 收稿日期:2001-07-30 修回日期:2001-09-25 发布日期:2001-12-15
  • 通讯作者: 李经建 E-mail:jjli@chem.pku.edu.cn

Direct Electrochemistry of Cytochrome C551 from Pseudomonas Aeruginosa at

Yan Jie;Li Jing-Jian;Zhang Bo;Cai Sheng-Min   

  1. College of Chemistry and Molecular Engineering, Peking University,Beijing　100871
  • Received:2001-07-30 Revised:2001-09-25 Published:2001-12-15
  • Contact: Li Jing-Jian E-mail:jjli@chem.pku.edu.cn

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摘要： 在不加任何电子转移促进剂的条件下，用循环伏安法(CV)和微分脉冲伏安法(DPV)观察到细胞色素C551在ITO导电玻璃上的直接电化学行为.结果显示电极反应过程为准可逆性质，计算得到细胞色素C551的扩散系数、式电位和异相电子转移标准速率常数，并对其在ITO导电玻璃电极上的电子转移机制进行了初步分析.

关键词: 细胞色素C551, ITO电极, 直接电化学

Abstract: The direct electrochemistry of cytochrome C551 from pseudomonas aeruginosa has been investigated at indium-doped tin oxide(ITO) optically transparent electrodes without any surface promoters or mediators. The cyclic voltammograms show a quasi-reversible electrode reaction. Plots of peak reduction current against square root of scan rate are linear over the range 5 mV•s－1 to 100 mV•s－1. The diffusion coefficient of C551 is calculated from the slope of the line. The rate constant for heterogeneous electron transfer is determined by measuring cyclic voltammetry peak separation as a function of scan rate.

Key words: Cytochrome C551, ITO electrode, Direct electrochemistry