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

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