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Systematic Morphology Changes of Gold Nanoparticles Supported on CeO 2 during CO Oxidation
Author(s) -
Uchiyama Tetsuya,
Yoshida Hideto,
Kuwauchi Yasufumi,
Ichikawa Satoshi,
Shimada Satoshi,
Haruta Masatake,
Takeda Seiji
Publication year - 2011
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201102487
Subject(s) - morphology (biology) , dissociation (chemistry) , colloidal gold , nanoparticle , nanotechnology , polyhedron , adsorption , molecule , chemical engineering , materials science , crystallography , chemistry , geology , organic chemistry , mathematics , combinatorics , engineering , paleontology
The morphology of gold nanoparticles (GNPs) supported on CeO 2 in various partial pressures of CO and O 2 is presented; their morphology correlates well with their catalytic activity. Adsorbed CO molecules stabilize the major {111} and {100} facets of GNP polyhedra and dissociation of O 2 molecules may occur at the perimeter interface of GNPs and CeO 2 supports with the aid of electron irradiation, thus causing rounded morphology of the GNPs (see diagram).