Accelerating and enhancing thermodynamic simulations of electrochemical interfaces

• URL: http://arxiv.org/abs/2503.17870v1
• Date: Sat, 22 Mar 2025 22:33:19 GMT
• Title: Accelerating and enhancing thermodynamic simulations of electrochemical interfaces
• Authors: Xiaochen Du, Mengren Liu, Jiayu Peng, Hoje Chun, Alexander Hoffman, Bilge Yildiz, Lin Li, Martin Z. Bazant, Rafael Gómez-Bombarelli,
• Abstract summary: Predicting stable surface structures remains challenging, as traditional surface Pourbaix diagrams tend to rely on expert knowledge.<n>Machine learning (ML) potentials can accelerate static modeling but often overlook dynamic surface transformations.<n>Here, we extend the Virtual Surface Site Relaxation-mathrm3$(001) method to autonomously sample surface reconstructions modeled under electrochemical conditions.
• Score: 36.982185832859145
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Electrochemical interfaces are crucial in catalysis, energy storage, and corrosion, where their stability and reactivity depend on complex interactions between the electrode, adsorbates, and electrolyte. Predicting stable surface structures remains challenging, as traditional surface Pourbaix diagrams tend to either rely on expert knowledge or costly $\textit{ab initio}$ sampling, and neglect thermodynamic equilibration with the environment. Machine learning (ML) potentials can accelerate static modeling but often overlook dynamic surface transformations. Here, we extend the Virtual Surface Site Relaxation-Monte Carlo (VSSR-MC) method to autonomously sample surface reconstructions modeled under aqueous electrochemical conditions. Through fine-tuning foundational ML force fields, we accurately and efficiently predict surface energetics, recovering known Pt(111) phases and revealing new LaMnO$_\mathrm{3}$(001) surface reconstructions. By explicitly accounting for bulk-electrolyte equilibria, our framework enhances electrochemical stability predictions, offering a scalable approach to understanding and designing materials for electrochemical applications.

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