Abstract
The equilibrium geometries, electronic properties, bonding behavior, stability and active sites of copper clusters doped with Ni or Sn atom have been studied using density functional theory. The results indicate that the impurity atoms change the equilibrium geometries, lower the total energies, and modify the HOMO–LUMO gaps and active sites of copper clusters. Meanwhile impurities prefer to be the surface or outer layer of the cluster, may form an oxide film from the active sites on the surface of materials, preventing oxygen and aggressive ions diffusion and protecting the copper alloy against corrosion.
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