Bimetallic clusters Pt6Au: Geometric and electronic structures within density functional theory

Wei Quan Tian, Maofa Ge, Fenglong Gu, Yuriko Aoki

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Within density functional theory at the general gradient approximation for exchange and correlation (BPW91) and the relativistic 19-electron Los Alamos National Laboratory effective core pseudopotentials and basis sets (3s3p2d), the geometric and electronic structures of Pt6Au bimetallic clusters have been studied in detail in comparison with Pt7. A total of 38 conformations for Pt6Au are located. The most stable conformation for Pt6Au is a sextet with an edge- and face-capped trigonal bipyramid, in which the Au atom caps an edge of the trigonal bipyramid. Pt6Au, in general, prefers a three-dimensional geometry and high spin electronic state with multireference character. The electronic impact of the doping of Au in Pt clusters on the overall chemical activity of the doped bimetallic cluster is not as significant as that of the doping of Pt in Au clusters; however, the doping of Au lowers the chemical activity, thus enhancing the chemoselectivity in the gas phase, of PtAu bimetallic clusters.

Original languageEnglish
Pages (from-to)9860-9866
Number of pages7
JournalJournal of Physical Chemistry A
Volume109
Issue number43
DOIs
Publication statusPublished - Nov 3 2005
Externally publishedYes

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Electronic structure
Density functional theory
Doping (additives)
density functional theory
electronic structure
Conformations
Electronic states
Gases
Atoms
electronics
Geometry
caps
Electrons
pseudopotentials
vapor phases
gradients
geometry
approximation
atoms
electrons

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry

Cite this

Bimetallic clusters Pt6Au : Geometric and electronic structures within density functional theory. / Tian, Wei Quan; Ge, Maofa; Gu, Fenglong; Aoki, Yuriko.

In: Journal of Physical Chemistry A, Vol. 109, No. 43, 03.11.2005, p. 9860-9866.

Research output: Contribution to journalArticle

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abstract = "Within density functional theory at the general gradient approximation for exchange and correlation (BPW91) and the relativistic 19-electron Los Alamos National Laboratory effective core pseudopotentials and basis sets (3s3p2d), the geometric and electronic structures of Pt6Au bimetallic clusters have been studied in detail in comparison with Pt7. A total of 38 conformations for Pt6Au are located. The most stable conformation for Pt6Au is a sextet with an edge- and face-capped trigonal bipyramid, in which the Au atom caps an edge of the trigonal bipyramid. Pt6Au, in general, prefers a three-dimensional geometry and high spin electronic state with multireference character. The electronic impact of the doping of Au in Pt clusters on the overall chemical activity of the doped bimetallic cluster is not as significant as that of the doping of Pt in Au clusters; however, the doping of Au lowers the chemical activity, thus enhancing the chemoselectivity in the gas phase, of PtAu bimetallic clusters.",
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