电位阶跃计时荧光技术测定异相电子转移动力学参数

Potential-Step Chronofluorometric Determination of Heterogeneous Electron-Transfer Kinetic Parameters with a Long Optical Pathlength Cell

建立了一种新的用于测定异相电子转移动力学参数的长光程光谱电化学技术 单电位阶跃计时荧光法(SPS CF)的理论模型,通过测定邻联甲苯胺在1mol·L-1HClO4+0.5mol·L-1HAc溶液中电氧化过程的标准速率常数(Ks)和电子转移系数(α),验证了该理论模型的合理性.

The theory of single potential-step chronofluorometric (SPS/CF) determination of heterogeneous electron transfer rate constants by using a long optical pathlength spectroelectrochemical cell is presented. The resulting expressions are verified via experiments of o-tolidine oxidation at a platinum electrode in 1 mol &middot I-1 HCIO4 + 0.5 mol &middot L-1 HAc medium.