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Surface properties of copper in different solvent mother solutions: A density functional theory study

Paper ID Volume ID Publish Year Pages File Format Full-Text
42470 45927 2010 7 PDF Available
Title
Surface properties of copper in different solvent mother solutions: A density functional theory study
Abstract

We use density functional theory (DFT) combined with conductor-like solvent model (COSMO) to study different solvent mother solution–copper interfacial properties, which are believed to play a key role in the “one-pot” synthesis of dimethyl ether (DME) from syngas in a slurry reactor. For three relevant crystallographic planes – (1 1 1), (1 1 0), and (1 0 0) – we develop a theoretical approach for calculating surface energies which cannot be determined experimentally. The surface energies show that the solvent not only has a strong effect on copper morphology, but also affects the Mulliken charges of Cu(h k l) surfaces. We also study CO molecules adsorbing on Cu(h k l) surfaces. It is found that both the structural parameters and the relative energies of CO are very sensitive to the COSMO solvent model. Thus the solvent effects can improve the stability of CO adsorption on Cu(h k l) surface and the ability of CO activation. This analysis gives us some new insights into the understanding of solvent effects.

Graphical abstractThe results show that the surface energies of Cu(h k l) surface are very sensitive to the COSMO solvent model. When CO molecules adsorb on the Cu(h k l) surface in chloroform, liquid paraffin and vacuum, the solvent effects can improve the stability of CO adsorption on Cu(h k l) surface and the ability of CO activation.Figure optionsDownload full-size imageDownload high-quality image (72 K)Download as PowerPoint slide

Keywords
DFT; CO; Cu; Solvent effects; Adsorption
First Page Preview
Surface properties of copper in different solvent mother solutions: A density functional theory study
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 375, Issue 2, 1 March 2010, Pages 181–187
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis