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Machine Learning Models Correct Systematic Errors in Alchemical Perturbation Density Functional Theory Applications to Catalysis

preprint
submitted on 06.05.2020 and posted on 07.05.2020 by Charles D. Griego, Lingyan Zhao, Karthikeyan Saravanan, John Keith
Alchemical perturbation density functional theory (APDFT) has great promise for enabling rapid and accurate computational screening of hypothetical catalyst sites, but first order approximations are unsatisfactorily inaccurate when alchemical derivatives are large. In this work, we analyze errors in first order APDFT calculation schemes for binding energies of CHx, NHx, OHx, and OOH adsorbates over a range of different coverages on hypothetical alloys based on a Pt(111) reference system. We then construct feature vectors by fingerprinting the dopant locations in the alloy and then use a data set of about 11,100 data points to train three different support vector regression machine learning models that correct systematic APDFT prediction errors for each of the three classes of carbon, nitrogen, and oxygen based adsorbates. While uncorrected first order APDFT alone can approximate reasonably accurate adsorbate binding energies on up to 36 hypothetical alloys based on a single Kohn-Sham DFT calculation on a 3 × 3 unit cell for Pt(111), the machine learning-corrected APDFT in principle extends this number to more than 20,000 and provides a recipe for developing other machine learning models to aid future high throughput screening studies.

Funding

National Science Foundation, Graduate Research Fellowship Program, Grant/Award Number: 1747452

National Science Foundation, Grant/Award Number: CHE-1856460

American Chemical Society Petroleum Research Fund: 55595-DNI4

History

Email Address of Submitting Author

jakeith@pitt.edu

Institution

University of Pittsburgh

Country

USA

ORCID For Submitting Author

0000-0002-6583-6322

Declaration of Conflict of Interest

No conflict of interest

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