The effect of an irreversible homogeneous reaction on finite-layer diffusion impedance

Modelling of Irreversible Homogeneous Reaction on Finite Diffusion Layers

“…The following describes the reaction mechanism for a catalytic electrochemical system with diffusion and an irreversible second-order reaction in a stagnant diffusion layer [1]:…”

“…One particular example is the oxidation of sulfite (S) to sulphate (Y), which is accelerated by the ferrous ion (R) and results in the formation of a reactive ferric ion (P) at an anode. Consider the non-linear differential equations [1] at steady-state conditions in a dimensionless form, as follows:…”

“…The role of electrochemical impedance spectroscopy in electrode processes is crucial. It is a useful experimental technique employed in an electrode procedure to categorise different mechanisms [1]. In the semi-infinite system, the diffusion-controlled resistance also contributes to the measured impedance.…”

“…Juan Bisquert [12] discussed the theory of electron diffusion and recombination impedance in a thin layer. Ten years ago, Chapman and Antano [1] used a computational approach to find the approximate concentration profiles and impedance behaviour. Uma et al [13] derived the approximate analytical expressions for the concentration of the system.…”

The Influence of Homogeneous Reactions on the Impedance Response of a Rotating Disk Electrode

“…Following Gerischer, Pototskayaa and Gichan invoked linear homogeneous kinetics and a Nernst stagnant diffusion layer. Chapman and Anta no 18 discussed the use of orthogonal collocation as a means to explore the influence of nonlinear homogeneous reactions on the impedance response within a Nernst stagnant diffusion layer.…”