Self-Consistent Charge Density-Functional Tight-Binding Parametrization for Pt–Ru Alloys
Journal Article
·
· Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory
- Univ. of Massachusetts, Amherst, MA (United States). Department of Chemical Engineering
- Univ. of Jyväskylä (Finland). Dept. of Physics
- Univ. of Massachusetts, Amherst, MA (United States). Dept. of Mechanical and Industrial Engineering
In this paper, we present a self-consistent charge density-functional tight-binding (SCC-DFTB) parametrization for PtRu alloys, which is developed by employing a training set of alloy cluster energies and forces obtained from Kohn–Sham density-functional theory (DFT) calculations. Extensive simulations of a testing set of PtRu alloy nanoclusters show that this SCC-DFTB scheme is capable of capturing cluster formation energies with high accuracy relative to DFT calculations. The new SCC-DFTB parametrization is employed within a genetic algorithm to search for global minima of PtRu clusters in the range of 13–81 atoms and the emergence of Ru-core/Pt-shell structures at intermediate alloy compositions, consistent with known results, is systematically demonstrated. Our new SCC-DFTB parametrization enables computationally inexpensive and accurate modeling of Pt–Ru clusters that are among the best-performing catalysts in numerous energy applications.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- SC0010610; AC02-05CH11231
- OSTI ID:
- 1480252
- Journal Information:
- Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory, Journal Name: Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory Journal Issue: 12 Vol. 121; ISSN 1089-5639
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Density-functional tight-binding approach for metal clusters, nanoparticles, surfaces and bulk: application to silver and gold
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journal | July 2018 |
Density-Functional Tight-Binding for Platinum Clusters and Bulk: Electronic vs Repulsive Parameters
|
journal | January 2019 |
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