Open AccessThe adsorption of Au on Zr-doped CeO2(110) surface: A first-principle study
Author(s) -
魏彦薇,
杨宗献
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.7139
Subject(s) - adsorption , materials science , doping , density functional theory , coulomb , substrate (aquarium) , catalysis , projector , distortion (music) , chemistry , chemical physics , computational chemistry , optoelectronics , physics , optics , organic chemistry , quantum mechanics , amplifier , oceanography , cmos , geology , electron
The adsorption of Au on the (110) surfaces of CeO2 and Zr-doped CeO2 were studied using projector-augmented wave (PAW) method based density-functional theory (DFT) within the gradient approximation (GGA) and with the inclusion of on-site Coulomb interaction (DFT+U). It is found that, due to the doping of Zr, the adsorption energies of Au are increased and the strongest adsorption geometry is altered. The doping of Zr results in larger distortion in the structure of the substrate, and enhances the catalytic activity of the Au/CeO2(110) system and the oxidization of Au. These results may lead to a better understanding for the Au/Zr-doped CeO2 catalysts and give some clues for improving the efficiency of the three-way catalysts (TWC).