Hydrogen irradiation-driven computational surface chemistry of lithium oxide and hydroxide

P. S. Krstic, S. Dwivedi, E. T. Ostrowski, S. Abe, A. Maan, A. C.T. van Duin, B. E. Koel

Research output: Contribution to journalArticlepeer-review

Abstract

We have investigated, using molecular dynamics, the surface chemistry of hydrogen incident on the amorphous and crystalline lithium oxide and lithium hydroxide surfaces upon being slowed down by a collision cascade and retained in the amorphous surface of either Li2O or LiOH. We looked for the bonding of H to the resident structures in the surface to understand a possible chain of chemical reactions that can lead to surface transformation upon H atom impact. Our findings, using Density-Functional Theory (DFT) trained ReaxFF force field/electronegativity equalization method potentials, stress the importance of inclusion of polarization in the dynamics of a Li-O-H system, which is also illustrated by DFT energy minimization and quantum-classical molecular dynamics using tight binding DFT. The resulting polar-covalent chemistry of the studied systems is complex and very sensitive to the instantaneous positions of all atoms as well as the ratio of concentrations of various resident atoms in the surface.

Original languageEnglish (US)
Article number244703
JournalJournal of Chemical Physics
Volume159
Issue number24
DOIs
StatePublished - Dec 28 2023

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry

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