dc.contributor.author |
Yang, Chengwu |
dc.contributor.author |
Capdevila-Cortada, Marçal |
dc.contributor.author |
Dong, Chunyan |
dc.contributor.author |
Zhou, Yan |
dc.contributor.author |
Wang, Junjun |
dc.contributor.author |
Yu, Xiaojuan |
dc.contributor.author |
Nefedov, Alexei |
dc.contributor.author |
Heißler, Stefan |
dc.contributor.author |
López, Núria |
dc.contributor.author |
Shen, Wenjie |
dc.contributor.author |
Wöll, Christof |
dc.contributor.author |
Wang, Yuemin |
dc.date.accessioned |
2021-08-24T07:05:13Z |
dc.date.available |
2021-09-01T02:45:06Z |
dc.date.issued |
2020-09-01 |
dc.identifier.uri |
http://hdl.handle.net/2072/450543 |
dc.format.extent |
7925 p. |
dc.language.iso |
eng |
dc.rights |
L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons:http://creativecommons.org/licenses/by-nc-nd/4.0/ |
dc.source |
RECERCAT (Dipòsit de la Recerca de Catalunya) |
dc.subject.other |
54 |
dc.title |
Surface Refaceting Mechanism on Cubic Ceria |
dc.type |
info:eu-repo/semantics/article |
dc.type |
info:eu-repo/semantics/acceptedVersion |
dc.embargo.terms |
12 mesos |
dc.relation.projectID |
WA 2535/2-1 |
dc.relation.projectID |
Science and Technology of Nanosystems Programme (432202) |
dc.relation.projectID |
21761132031 |
dc.relation.projectID |
U1832174 |
dc.relation.projectID |
21902005 |
dc.identifier.doi |
doi.org/10.1021/acs.jpclett.0c02409 |
dc.rights.accessLevel |
info:eu-repo/semantics/openAccess |
dc.description.abstract |
Polar surfaces of solid oxides are intrinsically unstable and tend to reconstruct due to the diverging electrostatic energy and thus often exhibit unique physical and chemical properties. However, a quantitative description of the restructuring mechanism of these polar surfaces remains challenging. Here we provide an atomic-level picture of the refaceting process that governs the surface polarity compensation of cubic ceria nanoparticles based on the accurate reference data acquired from the well-defined model systems. The combined results from advanced infrared spectroscopy, atomic-resolved transmission electron microscopy, and density functional theory calculations identify a two-step scenario where an initial O-terminated (2 × 2) reconstruction is followed by a severe refaceting via massive mass transport at elevated temperatures to yield {111}-dominated nanopyramids. This significant surface restructuring promotes the redox properties of ceria nanocubes, which account for the enhanced catalytic activity for CO oxidation. |