Electrochemical Behavior of Eu^（3＋） on Eastman AQ－29D Chemically Modified Electrode

The electrochemical behaviors of Eu3+ on Eastman AQ-29D/glassy carbon(GC) chemically modified electrode(CME) were studied. It was found that the reduction-oxidation process of Eu3+ is in a semi-infinite condition in 0.1 mol/L NaCIO4 supporting electrolyte(pH 4.4). The calibration curve was linear over the range 1.0×10-7 to 1.0×105 mol/L of Eu3+.The charge transport apparent diffusion coefficient of Eu3+ in the polymer film was determined to be(3.2±1.1)×10-11cm2/s by chronocoulometry.

Eastman-AQ/四硫富瓦烯修饰碳纤维微盘电极

利用新型的阳离子聚合物膜将四硫富瓦烯修饰到电极表面上，并研究了修饰电极的电化学行为。研究了浸泡时间、扫描速度和支持电解质对修饰电极性能的影响；循环伏安法、计时电流法和交流阻抗法表明四硫富瓦烯在膜中的扩散是控制步骤。四硫富瓦烯在膜中的第一对氧化还原峰呈现可逆的、单电子反应。用循环伏安法测得了ＴＴＦ＋ＴＴＦＺＴＴＦ反应的平衡常数。