Comparison of Predictive Approaches to the Dynamics of Activated Catalytic Processes

Abstract

We compare two systematic approaches for constructing the kinetic transition network associated with a catalytic reaction, namely Reactive Global Optimization (RGO) and discrete path sampling (DPS). We test convergence of links for selected steps of the dealloying processes occurring in Pt2Mn slab models under oxidative conditions for a DFT-parametrized Machine Learning Interaction Potential (MLIP). We find close agreement between the approaches. In particular, both schemes resolve multistep transformations that appeared as single steps in a previous meta-Dynamics (m-Dyn) treatment. RGO and DPS are therefore proposed as effective tools for the systematic exploration of reaction paths in catalysis.