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Updated: Jun 24, 2025

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
Published on: April 12, 2019
Importance sampling within configuration space integration for adsorbate thermophysical properties: a case study for
Katrín Blöndal1, Kirk Badger1, Khachik Sargsyan2
1Chemical Engineering Group, School of Engineering, Brown University, Providence, RI 02912, USA. franklin_goldsmith@brown.edu.
Abstract:
A new strategy is presented for computing anharmonic partition functions for the motion of adsorbates relative to a catalytic surface. Importance sampling is compared with conventional Monte Carlo. The importance sampling is significantly more efficient. This new approach is applied to CH3* on Ni(111) as a test case. The motion of methyl relative to the nickel surface is found to be anharmonic, with significantly higher entropy compared to the standard harmonic oscillator model. The new method is freely available as part of the Minima-Preserving Neural Network within the ADTHERM package.
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