Adsorption energies of molecular oxygen on Au clusters

被引:162
作者
Ding, XL
Li, ZY
Yang, JL [1 ]
Hou, JG
Zhu, QS
机构
[1] Univ Sci & Technol China, Lab Bond Select Chem, Hefei 230026, Anhui, Peoples R China
[2] Univ Sci & Technol China, Struct Res Lab, Hefei 230026, Anhui, Peoples R China
关键词
D O I
10.1063/1.1665323
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The adsorption properties of O-2 molecules on anionic, cationic, and neutral Au-n clusters (n=1-6) are studied using the density functional theory (DFT) with the generalized gradient approximation (GGA), and with the hybrid functional. The results show that the GGA calculations with the PW91 functional systemically overestimate the adsorption energy by 0.2-0.4 eV than the DFT ones with the hybrid functional, resulting in the failure of GGA with the PW91 functional for predicting the adsorption behavior of molecular oxygen on Au clusters. Our DFT calculations with the hybrid functional give the same adsorption behavior of molecular oxygen on Au cluster anions and cations as the experimental measurements. For the neutral Au clusters, the hybrid DFT predicts that only Au-3 and Au-5 clusters can adsorb one O-2 molecule.(C) 2004 American Institute of Physics.
引用
收藏
页码:9594 / 9600
页数:7
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