SO2 Decomposition on Pt/CeO2(111) Model Catalysts: On the Reaction Mechanism and the Influence of H-2 and CO

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10130676" target="_blank" >RIV/00216208:11320/12:10130676 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1021/jp212237x" target="_blank" >http://dx.doi.org/10.1021/jp212237x</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/jp212237x" target="_blank" >10.1021/jp212237x</a>

Result language

angličtina

Original language name

SO2 Decomposition on Pt/CeO2(111) Model Catalysts: On the Reaction Mechanism and the Influence of H-2 and CO

Original language description

We have performed a synchrotron radiation photoelectron spectroscopy (SR-PES) study on the mechanism of SO2 decomposition on Pt/CeO2(111) model catalysts prepared on Cu(111). Resonant photoemission spectroscopy (RPES) was applied to monitor changes of the cerium oxidation state. Adsorption of SO2 at 150 K on Pt/CeO2(111)/Cu(111) yields surface sulfites (SO32-) on ceria and upright standing molecular SO2 (SO2st) on Pt along with traces of atomic sulfur. Partial decomposition and desorption of the adsorbed species in the form of SO2 occur between 150 and 300 K. In this temperature region, slow accumulation of atomic sulfur is accompanied by reduction of the ceria support. Above 300 K, all surface species completely transform into atomic sulfur; this process is accompanied by a strong reoxidation of ceria. As probed by CO adsorption, the majority of the atomic sulfur species is located on the surface of the Pt particles. Possible reaction mechanisms involving spillover of numerous sulfur-

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2012

Confidentiality

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

Name of the periodical

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

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Volume of the periodical

116

Issue of the periodical within the volume

20

Country of publishing house

US - UNITED STATES

Number of pages

9

Pages from-to

10959-10967

UT code for WoS article

000304338500017

EID of the result in the Scopus database

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