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首页> 外文期刊>Electrochimica Acta >Study of homogeneous chemical reactions at spherical electrodes and microelectrodes in Additive Differential Pulse Voltammetry
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Study of homogeneous chemical reactions at spherical electrodes and microelectrodes in Additive Differential Pulse Voltammetry

机译：差分示伏伏安法研究球形电极和微电极上的均相化学反应

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摘要

This is a theoretical work for the characterization of homogeneous chemical reactions coupled to a reversible electrode process and analyzed by Additive Differential Pulse Voltammetry at spherical electrodes or microelectrodes. Explicit analytical expressions are presented for the CE and EC mechanisms valid for spherical electrodes of any radius and fast chemical reactions. These enable us to easily and rapidly analyze the response of these mechanisms even under very strong kinetic conditions. The ADPV technique proves to be very useful in the identification of the reaction mechanism and the characterization of the coupled chemical reaction by means of the values of the peak currents and potentials and the crossing potential, which can be measured with good accuracy from several ADPV experiments with different pulse heights. Simple criteria are given for discrimination between different situations where the electrode process is coupled to a homogeneous chemical reaction and, what is more difficult, to distinguish between an EC mechanism and an irreversible charge transfer process. Moreover, direct procedures for quantitative determination of kinetic and thermodynamic information are established.
机译：这是表征均相化学反应与可逆电极过程耦合的理论工作，并通过加性差分脉冲伏安法在球形电极或微电极处进行了分析。给出了适用于任何半径和快速化学反应的球形电极的CE和EC机制的明确解析表达式。这些使我们能够轻松快速地分析这些机制的响应，即使在非常强的动力学条件下也是如此。通过峰值电流，电位和交叉电位的值，ADPV技术被证明在识别反应机理和表征化学偶联反应方面非常有用，可以通过多次ADPV实验准确地进行测量具有不同的脉冲高度。给出了简单的标准来区分电极处理与均相化学反应耦合的不同情况，更困难的是区分EC机制和不可逆电荷转移过程。此外，建立了定量测定动力学和热力学信息的直接程序。

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