Authors: Xueli Cheng Yanyun Zhao Feng Li Yongjun Liu
Publish Date: 2015/08/13
Volume: 21, Issue: 9, Pages: 230-
Abstract
The oxidation of CO catalyzed by clusters of Au11 Au10Pt and Au9Pt2 was investigated using the M06 functional suite of the density functional theory Au and Pt atoms were described with the doubleζ valence basis set Los Alamos National Laboratory 2doublez LanL2DZ whereas the standard 6311++Gdp basis set was employed for the C and O atoms Our theoretical model showed that 1 after coordination to Au and AuPt cluster O2 and CO are apparently activated and Mulliken charges show that the gold atoms in the active sites of Au11 are negatively charged 2 AuPt clusters with 11 atoms can effectively catalyze the oxidation of CO by O2 3 Au11 exhibits good catalytic performance for the oxidation of CO 4 oxidation of CO occurs preferably on the Au–Pt active sites in Ptdoped clusters and the singlecenter mechanisms are more favorable energetically than the twocenter mechanisms 5 after adsorption an O2 molecule oxidates two CO molecules via stepwise mechanisms and 6 the catalytic processes are highly exothermicThis work was supported by the National Natural Science Foundation of China No 21173129 and 11174215 the Natural Science Foundation of Shandong Province China No ZR2012BL10 and the University Science and Technology Planning Project of Shandong Provincial Education Department No J13LD05
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