TY - JOUR
T1 - HAADF STEM observation of the Au/CeO2 nanostructures
AU - Chen, Yong
AU - Chen, Yue
AU - Qiu, Changjun
AU - Chen, Chunlin
AU - Wang, Zhongchang
N1 - Funding Information:
Y.C. thanks the financial support by the Construct Program of the Key Discipline of Hunan province, the Doctor Start-up Foundation of University of South China (Grant no. 2013XQD01 ), the Excellent Young Foundation of Education Department of the Hunan province ( 14B152 ). C.C. acknowledges support from the Grant-in-Aid for Young Scientists (B) (Grant no. 26820288 ). Z.W. thanks the financial support from the Grant-in-Aid for Young Scientists (A) (Grant no. 24686069 ), National Science Foundation of China (Grant no. 11332013 ), the JSPS and CAS under Japan–China Scientific Cooperation Program, and the Murata Science Foundation.
Publisher Copyright:
© 2014 Elsevier B.V.
PY - 2015/2/15
Y1 - 2015/2/15
N2 - Gold nanoparticles supported on oxide substrates are widely utilized as heterogeneous catalysts. Here, we apply a facile surfactant- and template-free hydrothermal method to fabricate Au/CeO2 nanostructures, and show a successful preparation of well-defined CeO2 nano-octahedrons with Au nanoparticles on their surface. The high-angle annular dark field scanning transmission microscopy imaging technique is applied to investigate microstructure of the Au/CeO2 nanostructure. We find that the Au clusters with a diameter of less than 2 nm cannot form the FCC Au lattice, and that twins emerge in the Au nanoparticles with a diameter of larger than 2 nm. Moreover, we identify preferential orientation relationships {111}Au∥{111}CeO2 and ∥110∥Au∥110∥CeO2 between the Au nanoparticles and CeO2 nano-octahedrons.
AB - Gold nanoparticles supported on oxide substrates are widely utilized as heterogeneous catalysts. Here, we apply a facile surfactant- and template-free hydrothermal method to fabricate Au/CeO2 nanostructures, and show a successful preparation of well-defined CeO2 nano-octahedrons with Au nanoparticles on their surface. The high-angle annular dark field scanning transmission microscopy imaging technique is applied to investigate microstructure of the Au/CeO2 nanostructure. We find that the Au clusters with a diameter of less than 2 nm cannot form the FCC Au lattice, and that twins emerge in the Au nanoparticles with a diameter of larger than 2 nm. Moreover, we identify preferential orientation relationships {111}Au∥{111}CeO2 and ∥110∥Au∥110∥CeO2 between the Au nanoparticles and CeO2 nano-octahedrons.
KW - Au/CeO
KW - Hydrothermal synthesis
KW - Scanning transmission electron microscopy
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U2 - 10.1016/j.matlet.2014.11.048
DO - 10.1016/j.matlet.2014.11.048
M3 - Article
AN - SCOPUS:84912526319
VL - 141
SP - 31
EP - 34
JO - Materials Letters
JF - Materials Letters
SN - 0167-577X
ER -