Design and Preparation of Supported Au Catalyst with Enhanced Catalytic Activities by Rationally Positioning Au Nanoparticles on Anatase.
A synergistic effect between individual components is crucial for increasing the activity of metal/metal oxide catalysts. The greatest challenge is how to control the synergistic effect to obtain enhanced catalytic performance. Through density functional theory calculations of model Au/TiO2 catalysts, it is suggested that there is strong interaction between Au nanoparticles and Ti species at the edge/corner sites of anatase, which is favorable for the formation of stable oxygen vacancies. Motivated by this theoretical analysis, we have rationally prepared Au nanoparticles attached to edge/corner sites of anatase support (Au/TiO2-EC), confirmed by their HR-TEM images. As expected, this strong interaction is well characterized by Raman, UV-visible, and XPS techniques. Very interestingly, compared with conventional Au catalysts, Au/TiO2-EC exhibits superior catalytic activity in the oxidations using O2. Our approach to controlling Au nanoparticle positioning on anatase to obtain enhanced catalytic activity offers an efficient strategy for developing more novel supported metal catalysts.
‡Key Lab of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, P. R. China.
Liang
L
Wang
†Department of Physics and Astronomy, West Virginia University, 135 Willey Street, Morgantown, West Virginia 26506-6315, United States.
Hong
H
Wang
†Department of Physics and Astronomy, West Virginia University, 135 Willey Street, Morgantown, West Virginia 26506-6315, United States.
Andrew E
AE
Rice
§Department of Materials Science and Key Laboratory of Mobile Materials MOE, Jilin University, Changchun 130012, P. R. China.
Wei
W
Zhang
∥State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, Xiamen University, Xiamen 361005, P. R. China.
Xiaokun
X
Li
∥State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, Xiamen University, Xiamen 361005, P. R. China.
Mingshu
M
Chen
‡Key Lab of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, P. R. China.
Xiangju
X
Meng
†Department of Physics and Astronomy, West Virginia University, 135 Willey Street, Morgantown, West Virginia 26506-6315, United States.
James P
JP
Lewis
‡Key Lab of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, P. R. China.
Feng-Shou
FS
Xiao
anatase; gold nanoparticle; interaction; oxidation reaction