Robinson Cortes Huerto - Electron transfer process at the electrode/electrolyte solution interface
Recorded 17 September 2025. Robinson Cortes-Huerto of the Max Planck Institute for Polymer Research presents "The electron transfer process at the electrode/electrolyte solution interface: A stochastic model and its Monte Carlo implementation" at IPAM's Embracing Stochasticity in Electrochemical Modeling Workshop.Abstract: A kinetic model of the electron transfer at the electrode / electrolyte interface is developed, implemented in a Monte Carlo framework, and applied to simulate this process in idealized systems consisting of the primitive model of electrolyte limited by an impenetrable conducting surface. In the present implementation, a charged, spherical interface surrounding an equally spherical sample of electrolyte is introduced to model a single-electrode system, providing the computational analog to the conceptual half-cell picture that is widely used in electrochemistry. The electron transfer itself is described as a simple surface hopping process underlying a first order reaction corresponding to one of the coupled M/M+ and X−/X half reactions. Then, the electron transfer at the interface is combined with the self-diffusion of ions in the electrolyte whose role is to supply reagents and disperse products, allowing the system to settle in a stationary non-equilibrium state. Simulations for the primitive model of electrolyte in contact with a charged impenetrable surface show that, after a brief transient, the samples sustain a steady current through the half-cell. The results quantify the dependence of the current on: the overall charge of the electrode, the ionic strength of the electrolyte, its viscosity and the kinetic parameter that represents the rate of the electron transfer for each ion in contact with the electrode. Since the simulated interface is very idealized, strategies to overcome the limitations of the present model are outlined and briefly discussed.
Learn more online at: https://www.ipam.ucla.edu/programs/workshops/workshop-i-embracing-stochasticity-in-electrochemical-modeling/?tab=overview Receive SMS online on sms24.me
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