Insight into the true role of hydrogen-carbonate species in CO oxidation over Pd/Al2O3 catalyst using SSITKA-transmission IR technique

被引：1

作者：

Hatoum, Ibrahim ^{[1
]}

Richard, Melissandre ^{[1
]}

Dujardin, Christophe ^{[1
]}

机构：

[1] Univ Artois, Univ Lille, Unite Catalyse & Chim Solide, CNRS, F-59000 Lille, France

来源：

CATALYSIS COMMUNICATIONS | 2023年 / 179卷

关键词：

CO oxidation; SSITKA; Operando IR spectroscopy; Hydrogen-carbonate; Mechanism; Palladium; LOW-TEMPERATURE; WATER; ADSORPTION; OXYGEN;

D O I：

10.1016/j.catcom.2023.106684

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The powerful combination of steady state isotopic transient kinetic analysis (SSITKA) and operando infrared spectroscopy (IR) was applied to study the CO oxidation reaction on Pd-supported Al2O3 catalyst at low tem-perature. The aim was to reveal the true role of hydrogen-carbonate species in the reaction mechanism. The SSITKA-IR experiments, conducted in presence and absence of CO2 in the gas feed, have confirmed that hydrogen-carbonate species behave as spectator species in the reaction. Its formation was due to re-adsorption of the CO2 product itself on the alumina surface as confirmed by the direct 12CO2/13CO2 exchange observed on the bare support.

引用

页数：7

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