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Updated: Jun 18, 2026
Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry
Published on: April 8, 2020
Role of Ag-doping in small transition metal clusters from first-principles simulations
S F Li1, Zelun Shao, Shuli Han
1School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, People's Republic of China. sflizzu@zzu.edu.cn
Abstract:
First-principles calculations are used to systematically investigate the geometric and electronic structures of both pure TM(n) (n=2-4) and Ag-modulated AgTM(n-1) (n=2-4; 3d-transition metal (TM): from Sc to Cu; 4d-TM: from Y to Ag elements) clusters. Some new ground state structures are found for the pure TM(n) clusters, such as a low symmetry configuration for Cr(3), which is found to be about 0.20 eV more stable than the previously reported C(2v) symmetry. In the most cases, Ag-doping can significantly elongate the bond lengths of the clusters and induce geometric distortions of the small clusters from the high dimensional to the low dimensional configurations. Importantly, introduction of Ag significantly changes the electronic structures of the small clusters and modulates the density of states in the proximity of the Fermi levels, which also varies with the size and the type of the cluster. The results contribute to future design of effective bimetallic alloy Ag/TM catalysts.
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