RT journal article
T1 Sub-nanometer surface chemistry and orbital hybridization in lanthanum-doped ceria nano-catalysts revealed by 3D electron microscopy
A1 Collins, Sean M.
A1 Fernández García, Susana
A1 Calvino Gámez, José Juan
A1 Midgley, Paul A.
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
AB Surface chemical composition, electronic structure, and bonding characteristics determine catalytic activity but are not resolved for individual catalyst particles by conventional spectroscopy. In particular, the nano-scale three-dimensional distribution of aliovalent lanthanide dopants in ceria catalysts and their effect on the surface electronic structure remains unclear. Here, we reveal the surface segregation of dopant cations and oxygen vacancies and observe bonding changes in lanthanum-doped ceria catalyst particle aggregates with sub-nanometer precision using a new model-based spectroscopic tomography approach. These findings refine our understanding of the spatially varying electronic structure and bonding in ceria-based nanoparticle aggregates with aliovalent cation concentrations and identify new strategies for advancing high efficiency doped ceria nano-catalysts.
PB Nature Publishing Group
SN 2045-2322
YR 2017
FD 2017
LK http://hdl.handle.net/10498/33924
UL http://hdl.handle.net/10498/33924
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 11-nov-2026