Principles of Electrochemistry

In many cases, electrochecial systems are more complex than a simple interfacial electron transfer and may involve coupled chemical reactions. The presence of homogeneous chemical reactions in conjuction with the electrode process can significantly impact the electrochemical response of the system. In this blog, we will explore the scenario where a homogeneous first-order reaction is followed by an interfacial electron transfer, as described by the following sequence reactions: \begin{equation} A\underset{k_b}{\overset{k_f}{\rightleftharpoons}}B + e^- \end{equation} \begin{equation} B + H^+\overset{k_1}{\rightarrow}BH \end{equation} Here k 1   is the homogeneous rate constant, and the species BH is considered electroinactive within the potential region under study. Additionally, we assume that the proton concentration is much higher than that of species B , allowing the homogeneous reaction to be approximated as a first-order reaction. Examples of this type of mechanism are the oxidat