TY - JOUR
T1 - Atomic layer reversal on CeO2 (100) surface
AU - Huang, Jinglu
AU - Yu, Yunbo
AU - Zhu, Jing
AU - Yu, Rong
N1 - Publisher Copyright:
© 2017, Science China Press and Springer-Verlag GmbH Germany.
PY - 2017/9/1
Y1 - 2017/9/1
N2 - The structure and properties of CeO2 surfaces have been intensively studied due to their importance in a lot of surface-related applications. Since most of surface techniques probe the structure information inside the outermost surface plane, the subsurface structure information has been elusive in many studies. Using the profile imaging with aberration-corrected transmission electron microscopy, the structure information in both the outermost layer and the sublayers of the CeO2 (100) surface has been obtained. In addition to the normal structures that have been reported before, where the surface is Ce- or O-terminated, a metastable surface has been discovered. In the new structure, there is an atomic layer reversal between the outermost layer and the sublayer, giving a structure with O as the outermost layer for the stoichiometry of normal Ce-terminated surface. The charge redistribution for the polarity compensation has also been changed relative to the normal surface.
AB - The structure and properties of CeO2 surfaces have been intensively studied due to their importance in a lot of surface-related applications. Since most of surface techniques probe the structure information inside the outermost surface plane, the subsurface structure information has been elusive in many studies. Using the profile imaging with aberration-corrected transmission electron microscopy, the structure information in both the outermost layer and the sublayers of the CeO2 (100) surface has been obtained. In addition to the normal structures that have been reported before, where the surface is Ce- or O-terminated, a metastable surface has been discovered. In the new structure, there is an atomic layer reversal between the outermost layer and the sublayer, giving a structure with O as the outermost layer for the stoichiometry of normal Ce-terminated surface. The charge redistribution for the polarity compensation has also been changed relative to the normal surface.
KW - aberration-corrected TEM
KW - atomic layer reversal
KW - ceria
KW - first-principles calculations
KW - surface structure
UR - https://www.scopus.com/pages/publications/85035122297
U2 - 10.1007/s40843-017-9082-1
DO - 10.1007/s40843-017-9082-1
M3 - 快报
AN - SCOPUS:85035122297
SN - 2095-8226
VL - 60
SP - 903
EP - 908
JO - Science China Materials
JF - Science China Materials
IS - 9
ER -