On the oxidation of carbon monoxide catalyzed by palladium

Close, J. S.; White, John

doi:10.1016/0021-9517(75)90023-8

Cited by 56 publications

(4 citation statements)

References 35 publications

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“…Strasser and co-workers confirmed with cryo-CO chemisorption measurements that CO indeed adsorbs on Fe and FeNi M–N–C-type catalysts strongly, while other metals such as Ni catalysts exhibit low heats of adsorption. , In the well-studied catalytic oxidation of CO on transition-metal particles such as Pt and Pd, chemisorption of reactants to the metal prior to surface reaction is required to form product CO 2 in a Langmuir–Hinshelwood-type mechanism (LH). , The strong binding of CO to platinum-group metals restricts the use of nanoparticle-based catalysts to higher temperatures for CO oxidation as competitive adsorption of CO at a lower temperature actually inhibits catalytic turnover . Other potential reaction paths for CO oxidation are of the Eley–Rideal (ER)-type (involving the reaction of a gas-phase species with an adsorbed species) and Mars–van Krevelen-type (MvK) (involving the transfer of lattice oxygen followed by reoxidation of the lattice). , Very recently, results of studies with isolated Ir atoms supported on Mg/Al 2 O 4 are consistent with an interesting mechanism involving a spectator CO molecule binding to the Ir site, while the CO oxidation reaction proceeds through an ER-type mechanism involving surface oxygen . Low-temperature CO oxidation has also been reported to occur on Au nanoparticles supported on reducible oxides where CO binds weakly to Au and the reducible oxide support is involved in the activation of O 2 , which can be considered to occur through an MvK-type mechanism. − …”

Section: Introductionmentioning

confidence: 98%

Mechanistic Insights on the Low-Temperature Oxidation of CO Catalyzed by Isolated Co Ions in N-Doped Carbon

et al. 2022

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Isolated cobalt ions on nitrogen-doped carbon (Co−N−C) catalyze CO oxidation at temperatures as low as 196 K, but the active site and mechanism for this reaction remain elusive. In this work, steady-state CO oxidation around 273 K over Co−N−C revealed nearly first-order behavior in both CO and O 2 as well as a negative apparent activation energy. Isotopic transient analysis of the reaction confirmed a rapid turnover frequency and low surface coverage of adsorbed intermediates leading to CO 2 (<10% of the Co). Results from kinetics experiments combined with quantum chemical calculations and molecular dynamics simulations are consistent with a reaction path involving weak adsorption of CO onto Co ions followed by a low barrier for the CO-assisted activation of weakly adsorbed O 2 . This proposed mechanism for dioxygen activation does not involve a redox cycle with the transition-metal ion and may be important in other low-temperature catalytic reactions involving O 2 .

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Section: Introductionmentioning

confidence: 98%

Mechanistic Insights on the Low-Temperature Oxidation of CO Catalyzed by Isolated Co Ions in N-Doped Carbon

et al. 2022

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“…According to the literature data, CO desorption may become very slow below 450 K [15], which is not the case in our modelling. Within the temperature range of 200-400°C the rate equation simplifies to the first order with respect to CO and zero order to O 2 [15].…”

Section: Reaction Kineticsmentioning

confidence: 50%

“…Oxidation of carbon monoxide over the precious metals was a subject of surveys of many groups, and provided numerous kinetic behaviour patterns. The literature provides many mechanisms of CO oxidation including the LangmuirHinshelwood-Hougen-Watson (LHHW) mechanism for CO oxidation over alumina-supported platinum catalysts [14] as well as the Eley-Rideal mechanism over aluminasupported palladium catalyst [15], with a CO desorption as the rate limiting step. According to the literature data, CO desorption may become very slow below 450 K [15], which is not the case in our modelling.…”

Section: Reaction Kineticsmentioning

confidence: 99%

“…The literature provides many mechanisms of CO oxidation including the LangmuirHinshelwood-Hougen-Watson (LHHW) mechanism for CO oxidation over alumina-supported platinum catalysts [14] as well as the Eley-Rideal mechanism over aluminasupported palladium catalyst [15], with a CO desorption as the rate limiting step. According to the literature data, CO desorption may become very slow below 450 K [15], which is not the case in our modelling. Within the temperature range of 200-400°C the rate equation simplifies to the first order with respect to CO and zero order to O 2 [15].…”

Section: Reaction Kineticsmentioning

confidence: 99%

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A Comparison Between Monolithic and Wire Gauze Structured Catalytic Reactors for CH4 and CO Removal from Biogas-Fuelled Engine Exhaust

et al. 2013

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The application of the wire gauzes as the catalytic supports can provide a number of advantages in biogas exhaust abatement. In this paper, a model of wire gauze structured reactor for biogas exhaust removal is proposed and model based calculations are performed to compare the wire gauze catalytic reactor with the classic monolith. The modelling bases on kinetic data experimentally obtained in a small-scale tubular reactor for cobalt and palladium (as reference) oxide catalysts doped with promoters (Ce, Pd). The heat and mass transfer characteristics of the wire gauze reactor are taken from the former studies by the authors. The simulations show that for assumed reactor parameters, a combination of the promoted cobalt oxide catalyst and the wire gauze support can give high conversion of methane and carbon monoxide. Keywords

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Surface structure of cobalt, palladium, and mixed oxide‐based catalysts and their activity in methane combustion studied by means of micro‐Raman spectroscopy

Chlebda

Jędrzejczyk

Jodłowski

et al. 2017

J Raman Spectroscopy

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This paper reports the results of the study of surface properties and catalytic activity of cobalt, palladium, and mixed oxide catalysts supported on alumina. Catalytic materials were prepared by the wetness impregnation method directly from solutions of metal salts and using the ultrasound irradiation. The material surface was investigated by micro‐Raman spectroscopy, and the activity in methane combustion was monitored. The results indicated the presence of different metal oxides on the catalysts' surfaces. Cobalt spinel Co3O4 was the main phase of the cobalt catalysts as well as species resulted from interactions with alumina support. In the case of palladium catalysts, the PdO was most prevalent. The article also discusses the observed variation in band position in the Raman spectra and compares the band assignment with literature data. The palladium and mixed oxide catalysts showed average conversion higher than 50% for methane combustion at 673.15 K (400 °C) especially those after sonication.

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On the oxidation of carbon monoxide catalyzed by palladium

Cited by 56 publications

References 35 publications

Mechanistic Insights on the Low-Temperature Oxidation of CO Catalyzed by Isolated Co Ions in N-Doped Carbon

Mechanistic Insights on the Low-Temperature Oxidation of CO Catalyzed by Isolated Co Ions in N-Doped Carbon

A Comparison Between Monolithic and Wire Gauze Structured Catalytic Reactors for CH4 and CO Removal from Biogas-Fuelled Engine Exhaust

Surface structure of cobalt, palladium, and mixed oxide‐based catalysts and their activity in methane combustion studied by means of micro‐Raman spectroscopy

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