Mechanism of Sulfur Poisoning and Storage: Adsorption and Reaction of SO(2) with Stoichiometric and Reduced Ceria Films on Cu(111)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F11%3A10108202" target="_blank" >RIV/00216208:11320/11:10108202 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1021/jp207014z" target="_blank" >http://dx.doi.org/10.1021/jp207014z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/jp207014z" target="_blank" >10.1021/jp207014z</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Mechanism of Sulfur Poisoning and Storage: Adsorption and Reaction of SO(2) with Stoichiometric and Reduced Ceria Films on Cu(111)

Popis výsledku v původním jazyce

We have performed a systematic synchrotron radiation photoelectron spectroscopy (SR-PES) study of the interaction of SO(2) with stoichiometric CeO(2)(111) and reduced CeO(2-x) films supported on Cu(111). Resonant photoelectron spectroscopy (RPES) was utilized to monitor changes in the cerium oxidation states. Adsorption of SO(2) at 150 and 300 K results mostly in formation of sulfite (SO(3)(2-)) species on both reduced and stoichiometric ceria. Other species such as sulfate (SO(4)(2-)), SO(2) chemisorbed at cationic sites, anionic SO(2)(-), atomic sulfur, surface sulfides, and bulk oxy-sulfides were detected. The origin of these species is discussed in relation to the changes in the oxidation state of ceria cations at the surface. The thermal evolutionof the species formed upon adsorption at 150 and 300 K was studied systematically on both the stoichiometric and the reduced films. It was found that the sulfite partially desorbs to release SO(2) and partially decomposes. In general, th

Název v anglickém jazyce

Mechanism of Sulfur Poisoning and Storage: Adsorption and Reaction of SO(2) with Stoichiometric and Reduced Ceria Films on Cu(111)

Popis výsledku anglicky

We have performed a systematic synchrotron radiation photoelectron spectroscopy (SR-PES) study of the interaction of SO(2) with stoichiometric CeO(2)(111) and reduced CeO(2-x) films supported on Cu(111). Resonant photoelectron spectroscopy (RPES) was utilized to monitor changes in the cerium oxidation states. Adsorption of SO(2) at 150 and 300 K results mostly in formation of sulfite (SO(3)(2-)) species on both reduced and stoichiometric ceria. Other species such as sulfate (SO(4)(2-)), SO(2) chemisorbed at cationic sites, anionic SO(2)(-), atomic sulfur, surface sulfides, and bulk oxy-sulfides were detected. The origin of these species is discussed in relation to the changes in the oxidation state of ceria cations at the surface. The thermal evolutionof the species formed upon adsorption at 150 and 300 K was studied systematically on both the stoichiometric and the reduced films. It was found that the sulfite partially desorbs to release SO(2) and partially decomposes. In general, th

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)

Rok uplatnění

2011

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

115

Číslo periodika v rámci svazku

40

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

19872-19882

Kód UT WoS článku

000295546100051

EID výsledku v databázi Scopus

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