Title :

Revealing Origin of Hydrogen-Carbonate Species in CO Oxidation Over Pt/Al2O3: A SSITKA-IR Study

Author(s) :

Hatoum, Ibrahim [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Bouchoul, Nassim [Auteur]
3209|||Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Richard, Mélissandre [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Dujardin, Christophe [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Journal title :

Topics in Catalysis

Abbreviated title :

Top Catal

Volume number :

66

Pages :

915–921

Publisher :

Springer Verlag

Publication date :

2022-11-04

ISSN :

1022-5528

English keyword(s) :

CO oxidation
SSITKA
Operando IR spectroscopy
Hydrogen-carbonate
Mechanism

HAL domain(s) :

Chimie/Catalyse

English abstract : [en]

The catalytic oxidation of CO by O2 to form CO2 over Pt based catalysis is one of the most studied catalytic reaction leading to controversial mechanism descriptions. Steady State Isotopic Transient Kinetic Analysis (SSITKA) ...
Show more >The catalytic oxidation of CO by O2 to form CO2 over Pt based catalysis is one of the most studied catalytic reaction leading to controversial mechanism descriptions. Steady State Isotopic Transient Kinetic Analysis (SSITKA) coupled with InfraRed (IR) spectroscopy is a powerful technique to study heterogeneous reaction mechanisms combining both the observation of adsorbed species on the catalyst surface and kinetic measurements. In this paper, SSITKA-IR technique was applied to study the CO oxidation reaction in presence and absence of CO2 in order to distinguish between active and spectator intermediates formed during the reaction. Linear carbonyl and bridged carbonyl type species adsorbed on metallic Pt0 were clearly identified as active intermediates at low temperature (131 °C). In contrast, the hydrogen-carbonate species formed during CO oxidation reaction were proven to be inactive species in CO2 formation but rather due to the re-adsorption of CO2 product itself on alumina surface.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Other project(s) or funding source(s) :

Région Hauts de France (Grant STaRS 2019)
Centrale Lille Institute
Ministère de l’Enseignement Supérieur et de la Recherche (CPER IRENE and CPER ECRIN)
European Fund for Regional Economic Development

Administrative institution(s) :

Université de Lille
CNRS
Centrale Lille
ENSCL
Univ. Artois

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Research team(s) :

Remédiation et matériaux catalytiques (REMCAT)

Submission date :

2023-03-09T01:25:35Z
2023-03-20T14:06:57Z
2023-11-29T08:13:08Z
2023-12-08T14:45:27Z
2023-12-12T15:31:27Z