化学学报 ›› 1992, Vol. 50 ›› Issue (3): 274-280. 上一篇    下一篇

研究论文

线性扫描伏安法研究 II: 超微盘电极上催化电流理论

吴志斌;张祖训   

  1. 南京大学化学系
  • 出版日期:1992-03-15 发布日期:1992-03-15

Investigation on linear sweep voltammetry II: The theory of catalytic current at ultramicrodisk electrode

WU ZHIBIN;ZHANG ZUXUN   

  • Online:1992-03-15 Published:1992-03-15

本文提出了超微盘电极上线性扫描伏安法催化电流理论及恒电位催化电流方程式,证实在k~1~1~z值足够大的条件下, 两种方法具有相同的电流-电位方程式。对理论进行了验证, 测定了亚铁氰化钾-氨基比林-氢氧化钾体系的化学反应速率常数(k~f)。

关键词: 催化, 反应动力学, 反应速度常数, 亚铁氰化钾, 氢氧化钾, 热带林, 氨基比林, 微盘电极, 扫描伏安法, 电流理论

The equations for catalytic wave at ultramicrodisk electrode with linear sweep voltammetry and constant potential voltammetry are derived. It is shown that when krcz* (where kf is the rate constant for the chem. reaction, cz* is the concentration of catalyst) is larger, the same current-potential relations can be obtained. Experiments were carried out on platinum ultramicrodisk electrode to verify the theory. Theor. conclusions are in good agreement with experimental data for the oxidation of K4Fe(CN)6 in antipyrine-KOH solution The rate constant for catalytic reaction (kf) is also determine

Key words: CATALYSIS, REACTION KINETICS, REACTION RATE CONSTANT, POTASSIUM FERROCYANIDE, POTASSIUM HYDROXIDE, TROPICAL FOREST, AMINOPYRINE, ELECTRODE PROCESS

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