Adsorption and Decomposition of Formic Acid on Model Ceria and Pt/Ceria Catalysts

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F13%3A10192033" target="_blank" >RIV/00216208:11320/13:10192033 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1021/jp311008v" target="_blank" >http://dx.doi.org/10.1021/jp311008v</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/jp311008v" target="_blank" >10.1021/jp311008v</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Adsorption and Decomposition of Formic Acid on Model Ceria and Pt/Ceria Catalysts

Popis výsledku v původním jazyce

Adsorption and reaction of formic acid on stoichiometric CeO2(111), partially reduced CeO2-x, and Pt/CeO2(111) films prepared on Cu(111) were studied by means of synchrotron radiation photoelectron spectroscopy (SRPES), resonant photoemission spectroscopy (APES), infrared reflection absorption spectroscopy (IRAS), and temperature-programmed desorption (TPD). On all studied samples, the principal species formed during formic acid adsorption below 160 K were formate and molecular formic acid. In the presence of Pt particles, formate species were predominantly localized on Pt at 100 K, and on ceria at or above 300 K. Below 400 K, molecular formic acid decomposes to formate with partial release of CO2, CO, hydrogen, and water. Analysis of the TPD fragmentation suggests additional evolution of methane. Above 400 K, desorption of CO2, CO, hydrogen, and water is observed. This process is controlled by the stoichiometry of ceria and the presence of Pt particles. In particular, desorption of CO

Název v anglickém jazyce

Adsorption and Decomposition of Formic Acid on Model Ceria and Pt/Ceria Catalysts

Popis výsledku anglicky

Adsorption and reaction of formic acid on stoichiometric CeO2(111), partially reduced CeO2-x, and Pt/CeO2(111) films prepared on Cu(111) were studied by means of synchrotron radiation photoelectron spectroscopy (SRPES), resonant photoemission spectroscopy (APES), infrared reflection absorption spectroscopy (IRAS), and temperature-programmed desorption (TPD). On all studied samples, the principal species formed during formic acid adsorption below 160 K were formate and molecular formic acid. In the presence of Pt particles, formate species were predominantly localized on Pt at 100 K, and on ceria at or above 300 K. Below 400 K, molecular formic acid decomposes to formate with partial release of CO2, CO, hydrogen, and water. Analysis of the TPD fragmentation suggests additional evolution of methane. Above 400 K, desorption of CO2, CO, hydrogen, and water is observed. This process is controlled by the stoichiometry of ceria and the presence of Pt particles. In particular, desorption of CO

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

2013

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

117

Číslo periodika v rámci svazku

24

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

12483-12494

Kód UT WoS článku

000320911100011

EID výsledku v databázi Scopus

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