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Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
Published on: April 12, 2019
Multiconfiguration time-dependent Hartree method applied to molecular dissociation on surfaces: H2 + Pt(111)
C Crespos1, H-D Meyer, R C Mowrey
1Laboratoire de Physico-Chimie Moléculaire, UMR 5803 CNRS, Université Bordeaux 1, 351 Course de la Liberation, Talence, France. c.crespos@lpcm.u-bordeaux1.fr
The Journal of Chemical Physics
|February 25, 2006
Summary
The multiconfiguration time-dependent Hartree method efficiently calculates H(2) dissociative chemisorption on Pt(111). This quantum dynamics approach offers accuracy with reduced computational resources compared to standard methods.
Area of Science:
- Quantum dynamics
- Chemical physics
- Surface science
Background:
- Gas-surface reactions are crucial in catalysis.
- Accurate quantum dynamics are needed to model dissociative chemisorption.
- The Pt(111) surface is a key catalyst for hydrogenation reactions.
Purpose of the Study:
- To evaluate the multiconfiguration time-dependent Hartree (MCTDH) method for gas-surface reactions.
- To compare MCTDH performance against the standard time-dependent wave-packet (TDWP) method.
- To investigate the dissociative chemisorption of H(2) on Pt(111) using quantum dynamics.
Main Methods:
- Four-dimensional quantum dynamics calculations.
- Application of the multiconfiguration time-dependent Hartree (MCTDH) method.
- Utilizing two models: one including molecular rotation, another with frozen rotation.
Main Results:
- MCTDH calculations accurately determined initial-state resolved dissociation probabilities for H(2) on Pt(111).
- The MCTDH method demonstrated superior efficiency, requiring less memory and computation time than TDWP.
- Insights were gained for future full six-dimensional quantum dynamics studies.
Conclusions:
- The MCTDH method is highly efficient and accurate for studying H(2) dissociative chemisorption on Pt(111).
- MCTDH provides a valuable computational tool for gas-surface reaction dynamics.
- This study facilitates more complex quantum dynamics simulations in surface science.
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