HAADF STEM observation of the Au/CeO2 nanostructures

Yong Chen; Yue Chen; Changjun Qiu; Chunlin Chen; Zhongchang Wang

doi:10.1016/j.matlet.2014.11.048

HAADF STEM observation of the Au/CeO₂ nanostructures

Yong Chen
, Yue Chen
, Changjun Qiu
, Chunlin Chen^*
, Zhongchang Wang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	31-34
Number of pages	4
Journal	Materials Letters
Volume	141
DOIs	https://doi.org/10.1016/j.matlet.2014.11.048
State	Published - 15 Feb 2015
Externally published	Yes

Keywords

Au/CeO
Hydrothermal synthesis
Scanning transmission electron microscopy

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10.1016/j.matlet.2014.11.048

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@article{b6957c59a22540cd92d6857fcfa41c6d,

title = "HAADF STEM observation of the Au/CeO2 nanostructures",

abstract = "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.",

keywords = "Au/CeO, Hydrothermal synthesis, Scanning transmission electron microscopy",

author = "Yong Chen and Yue Chen and Changjun Qiu and Chunlin Chen and Zhongchang Wang",

note = "Publisher Copyright: {\textcopyright} 2014 Elsevier B.V.",

year = "2015",

month = feb,

day = "15",

doi = "10.1016/j.matlet.2014.11.048",

language = "英语",

volume = "141",

pages = "31--34",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

}

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

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

UR - https://www.scopus.com/pages/publications/84912526319

U2 - 10.1016/j.matlet.2014.11.048

DO - 10.1016/j.matlet.2014.11.048

M3 - 文章

AN - SCOPUS:84912526319

SN - 0167-577X

VL - 141

SP - 31

EP - 34

JO - Materials Letters

JF - Materials Letters

ER -

HAADF STEM observation of the Au/CeO₂ nanostructures

Abstract

Keywords

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