Photoemission study of Rh/CeO2/Cu(1 1 1) system-Oxidation state, stability and interaction with adsorbed gases

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F10%3A10071351" target="_blank" >RIV/00216208:11320/10:10071351 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Photoemission study of Rh/CeO2/Cu(1 1 1) system-Oxidation state, stability and interaction with adsorbed gases

Popis výsledku v původním jazyce

We have studied change of surface oxidation state of cerium oxide affected by Rh deposition, and interaction with gas molecules. Oriented films of CeO2(1 1 1)/Cu(1 1 1) were used as prepared (stoichiometric) as well as reduced by soft Ar+ sputtering. Rhodium was evaporated onto these substrates. Prepared Rh/CeO2 samples were exposed to molecules CO and H2O. We have measured, core level, valence band and resonant photoemission spectra after every experimental step comparing our results of the behaviour of both samples (stoichiometric and reduced before Rh deposition) with regard to oxidation or reduction of the cerium oxide surface. We have demonstrated that resonant spectroscopy represents a good and sensitive tool to observe the, oxidation state of cerium providing tool for the interpretation of catalytic reaction.

Název v anglickém jazyce

Photoemission study of Rh/CeO2/Cu(1 1 1) system-Oxidation state, stability and interaction with adsorbed gases

Popis výsledku anglicky

We have studied change of surface oxidation state of cerium oxide affected by Rh deposition, and interaction with gas molecules. Oriented films of CeO2(1 1 1)/Cu(1 1 1) were used as prepared (stoichiometric) as well as reduced by soft Ar+ sputtering. Rhodium was evaporated onto these substrates. Prepared Rh/CeO2 samples were exposed to molecules CO and H2O. We have measured, core level, valence band and resonant photoemission spectra after every experimental step comparing our results of the behaviour of both samples (stoichiometric and reduced before Rh deposition) with regard to oxidation or reduction of the cerium oxide surface. We have demonstrated that resonant spectroscopy represents a good and sensitive tool to observe the, oxidation state of cerium providing tool for the interpretation of catalytic reaction.

Druh

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

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

—

Projekt

<a href="/cs/project/GA202%2F07%2F0782" target="_blank" >GA202/07/0782: Reaktivita modelových katalyzátorů na bázi CeOx</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název periodika

Journal of Electron Spectroscopy and Related Phenomena

ISSN

0368-2048

e-ISSN

—

Svazek periodika

181

Číslo periodika v rámci svazku

2-3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

—

Kód UT WoS článku

000281932100029

EID výsledku v databázi Scopus

—