Journal
PHYSICAL REVIEW B
Volume 75, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.75.115407
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The interaction of formate molecules with the Cu(110) surface is investigated using density-functional theory calculations. We find that in the most stable structures for low and high coverage, the formate molecules are sitting perpendicular to the Cu(110) surface, and they are adsorbed in a bridge position, i.e., the O-C-O group forms a bridge between two Cu atoms. Other tested configurations are less stable by at least 0.45 eV per formate molecule. In the case of an oxygen-precovered Cu(110) surface with high formate coverage [two molecules in a (2x2) unit cell] we find a very similar adsorption geometry. We find an attractive interaction between adsorbed formate molecules on the copper surface. Our results are consistent with experimental results by scanning tunneling microscopy and photoelectron diffraction.
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