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Published on: April 12, 2019
Ab initio molecular dynamics study of methanol adsorption on copper clusters
Wen-Dung Hsu1, Masahiko Ichihashi, Tamotsu Kondow
1Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611-6400, USA.
The Journal of Physical Chemistry. A
|January 19, 2007
Summary
Small copper clusters (Cun) show structural changes with size, favoring methanol adsorption at low-coordination sites. Charge transfer stabilizes this adsorption, regardless of cluster dimensionality.
Area of Science:
- Computational Chemistry
- Materials Science
- Surface Science
Background:
- Understanding the behavior of small metal clusters is crucial for catalysis.
- Copper clusters (Cun) are of interest due to their catalytic potential.
- Methanol adsorption on metal surfaces is a fundamental process in chemical reactions.
Purpose of the Study:
- To investigate the structural evolution of copper clusters (Cun, n=2-9).
- To determine the preferred adsorption sites for methanol on these clusters.
- To elucidate the mechanism of methanol adsorption and its dependence on cluster structure.
Main Methods:
- First-principles calculations.
- Molecular dynamics simulations.
- Analysis of electronic charge localization and bond properties.
Main Results:
- Copper clusters exhibit a transition from 1D to 2D and 3D structures as size increases.
- Methanol preferentially adsorbs at low-coordination sites on the clusters.
- Charge transfer from copper clusters to methanol stabilizes adsorption.
- Cluster dimensionality (1D, 2D, 3D) does not significantly affect methanol adsorption.
Conclusions:
- Low-coordination sites on copper clusters are key for methanol adsorption.
- Charge transfer is a critical factor in the adsorption stabilization mechanism.
- The structural dimensionality of small copper clusters does not impede methanol adsorption.
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