TY - JOUR
T1 - Bimetallic clusters Pt6Au
T2 - Geometric and electronic structures within density functional theory
AU - Tian, Wei Quan
AU - Ge, Maofa
AU - Gu, Fenglong
AU - Aoki, Yuriko
PY - 2005/11/3
Y1 - 2005/11/3
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=27744464469&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=27744464469&partnerID=8YFLogxK
U2 - 10.1021/jp053961e
DO - 10.1021/jp053961e
M3 - Article
C2 - 16833301
AN - SCOPUS:27744464469
VL - 109
SP - 9860
EP - 9866
JO - Journal of Physical Chemistry A
JF - Journal of Physical Chemistry A
SN - 1089-5639
IS - 43
ER -