Computationally Effective Approach for Studies of Mechanism and Thermodynamics of Heterogeneous Catalytic Processes on Metal Oxides

Ekaterina G Ragoyja*, Vitaly E Matulis, Oleg A Ivashkevich, Dmitry A Lyakhov, Dominik Michels

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

To understand the nature of heterogeneous catalytic processes and improve their efficiency, it is necessary to conduct both experimental and theoretical studies. At the same time, there is no unified approach to obtaining the necessary data using quantum chemistry methods. In this work, problems of the existing calculational approaches are analyzed. The obtained information is used to develop the original three-layer embedded cluster model approach, which is shown to be the most effective. The general algorithm for obtaining such models for various oxides is formulated. The sufficient accuracy of the proposed models in predicting geometric and energy characteristics, vibrational frequencies, activation barriers, and thermodynamic characteristics is verified. The specifics of calculating the thermodynamic characteristics of heterogeneous processes using the proposed cluster models is studied in detail. The developed approach is an effective tool for studying the mechanism of heterogeneous catalytic processes both by itself and in combination with experiment.

Original languageEnglish (US)
Article numbere27470
JournalInternational Journal of Quantum Chemistry
Volume124
Issue number17
DOIs
StatePublished - Sep 5 2024

Keywords

  • adsorption
  • cluster models
  • heterogeneous catalysis
  • metal oxides catalysts
  • statistical thermodynamics

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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