Morphology and CO Oxidation Reactions on Anion Doped CeOXFY/Rh(111) and CeOX/Rh(111) Inverse Catalysts

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10334385" target="_blank" >RIV/00216208:11320/16:10334385 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=o5DkoSUPIK" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=o5DkoSUPIK</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpcc.6b07431" target="_blank" >10.1021/acs.jpcc.6b07431</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Morphology and CO Oxidation Reactions on Anion Doped CeOXFY/Rh(111) and CeOX/Rh(111) Inverse Catalysts

Popis výsledku v původním jazyce

Doping cerium oxide with additives is a common procedure that improves stability of cerium oxide-based catalysts. We prepared fluorine doped cerium oxide samples in the form of inverse catalysts on Rh(111) and compared their electronic, chemical, and morphological properties with fluorine-free CeOX samples. By means of X-ray photoelectron spectroscopy (XPS), we followed the formation of oxygen vacancies and the depletion of fluorine after exposure of CeOXFY to CO and 02 gases at elevated temperatures. According to Ce 3d XPS spectra, the ability to create oxygen vacancies is not altered by fluorine atoms. Our results from low energy electron diffraction (LEED) and atomic force microscopy (AFM) show that fluorine affects mainly the morphology of the layers. Unlike the CeO2 layers, fluorine-doped samples form 3D islands, which are partially rotated with respect to Rh [1 (1) over bar0] direction due to stretching of the lattice constant caused by cerium oxide reduction. The possibility for creation stable Ce3+ sites without reducing the anion doping a perspective tool for defect engineering in cerium oxide-based catalysts. oxygen storage capacity makes anion doping a perspective tool for defect engineering in cerium oxide-based catalysts.

Název v anglickém jazyce

Morphology and CO Oxidation Reactions on Anion Doped CeOXFY/Rh(111) and CeOX/Rh(111) Inverse Catalysts

Popis výsledku anglicky

Doping cerium oxide with additives is a common procedure that improves stability of cerium oxide-based catalysts. We prepared fluorine doped cerium oxide samples in the form of inverse catalysts on Rh(111) and compared their electronic, chemical, and morphological properties with fluorine-free CeOX samples. By means of X-ray photoelectron spectroscopy (XPS), we followed the formation of oxygen vacancies and the depletion of fluorine after exposure of CeOXFY to CO and 02 gases at elevated temperatures. According to Ce 3d XPS spectra, the ability to create oxygen vacancies is not altered by fluorine atoms. Our results from low energy electron diffraction (LEED) and atomic force microscopy (AFM) show that fluorine affects mainly the morphology of the layers. Unlike the CeO2 layers, fluorine-doped samples form 3D islands, which are partially rotated with respect to Rh [1 (1) over bar0] direction due to stretching of the lattice constant caused by cerium oxide reduction. The possibility for creation stable Ce3+ sites without reducing the anion doping a perspective tool for defect engineering in cerium oxide-based catalysts. oxygen storage capacity makes anion doping a perspective tool for defect engineering in cerium oxide-based catalysts.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

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

2016

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

—

Svazek periodika

120

Číslo periodika v rámci svazku

47

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

26782-26792

Kód UT WoS článku

000389161300021

EID výsledku v databázi Scopus

2-s2.0-85041966250