Ordered Phases of Reduced Ceria As Epitaxial Films on Cu(111)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10288028" target="_blank" >RIV/00216208:11320/14:10288028 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1021/jp409220p" target="_blank" >http://dx.doi.org/10.1021/jp409220p</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/jp409220p" target="_blank" >10.1021/jp409220p</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ordered Phases of Reduced Ceria As Epitaxial Films on Cu(111)

Popis výsledku v původním jazyce

Changes of stoichiometry in reducible oxides are inevitably accompanied by changes of the oxide structure. We study the relationship between the stoichiometry and the structure in thin epitaxial films of reduced ceria, CeOx, 1.5 {= x {= 2, prepared via an interface reaction between a thin ceria film on Cu(111) and a Ce metal deposit. We show that the transition between the limiting stoichiometries CeO2 and Ce2O3 is realized by equilibration of mobile oxygen vacancies near the surface of the film, whilethe fluorite lattice of cerium atoms remains unchanged during the process. We identify two surface reconstructions representing distinct oxygen vacancy ordering during the transition, a (root 7 x root 7)R19.1 degrees reconstruction representing a bulk termination of the t-Ce7O12 and a (3 x 3) reconstruction representing a bulk termination of CeO1.67. Due to the special property to yield ordered phases of reduced ceria the interface reaction between Ce and thin film ceria represents a uni

Název v anglickém jazyce

Ordered Phases of Reduced Ceria As Epitaxial Films on Cu(111)

Popis výsledku anglicky

Changes of stoichiometry in reducible oxides are inevitably accompanied by changes of the oxide structure. We study the relationship between the stoichiometry and the structure in thin epitaxial films of reduced ceria, CeOx, 1.5 {= x {= 2, prepared via an interface reaction between a thin ceria film on Cu(111) and a Ce metal deposit. We show that the transition between the limiting stoichiometries CeO2 and Ce2O3 is realized by equilibration of mobile oxygen vacancies near the surface of the film, whilethe fluorite lattice of cerium atoms remains unchanged during the process. We identify two surface reconstructions representing distinct oxygen vacancy ordering during the transition, a (root 7 x root 7)R19.1 degrees reconstruction representing a bulk termination of the t-Ce7O12 and a (3 x 3) reconstruction representing a bulk termination of CeO1.67. Due to the special property to yield ordered phases of reduced ceria the interface reaction between Ce and thin film ceria represents a uni

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

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Svazek periodika

118

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

357-365

Kód UT WoS článku

000329678200039

EID výsledku v databázi Scopus

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