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Updated: Aug 7, 2026
10:52
Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
Published on: April 12, 2019
Joint density-functional theory: ab initio study of Cr2O3 surface chemistry in solution
S A Petrosyan1, A A Rigos, T A Arias
1Department of Physics, Cornell University, Ithaca, New York 14853, USA. sap23@cornell.edu
The Journal of Physical Chemistry. B
|July 21, 2006
Summary
A new density-functional theory models electronic systems in liquid environments. Water minimally affects chloride adsorption but significantly impacts hydrogen binding on Cr2O3 surfaces, crucial for stainless steel passivation.
Area of Science:
- Computational chemistry
- Materials science
- Surface science
Background:
- Chromium(II) oxide (Cr2O3) is a critical passivating layer for stainless steel alloys.
- Understanding solvent effects on surface chemistry is vital for corrosion resistance.
- Existing models often neglect the influence of molecular liquid environments.
Purpose of the Study:
- To introduce a novel density-functional theory for ab initio electronic system descriptions in molecular liquid environments.
- To investigate the impact of a water solvent on the surface chemistry of Cr2O3.
- To analyze the adsorption behavior of chloride and hydrogen on oxygen-terminated Cr2O3 surfaces.
Main Methods:
- Development of a new density-functional theory approach.
- First-principles calculations for electronic systems in contact with a molecular liquid.
- Comparative analysis of Cr2O3 surface chemistry in vacuum versus aqueous environments.
Main Results:
- Water has a minimal effect on chloride ion adsorption to the oxygen-terminated Cr2O3 surface.
- Water significantly alters the binding of hydrogen to the oxygen-terminated Cr2O3 surface.
- The dielectric screening properties of water play a crucial role in surface passivation.
Conclusions:
- The developed density-functional theory accurately captures solvent effects on surface chemistry.
- Water's dielectric screening is essential for understanding the passivating properties of Cr2O3.
- Solvent interactions must be considered for accurate modeling of metal alloy surface behavior.
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