Probing the redox capacity of Pt–CeO<sub>2</sub> model catalyst for low-temperature CO oxidation

Simanenko, Alexander; Kastenmeier, Maximilian; Piliai, Lesia; Kosto, Yuliia; Škála, Tomáš; Tsud, Nataliya; Mehl, Sascha; Vorokhta, Mykhailo; Matolı́nová, Iva; Lykhach, Yaroslava; Libuda, Jörg

doi:10.1039/d3ta02507a

J. Mater. Chem. A

2023

DOI: 10.1039/d3ta02507a

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Probing the redox capacity of Pt–CeO₂ model catalyst for low-temperature CO oxidation

Alexander Simanenko

Maximilian Kastenmeier

Lesia Piliai

et al.

Abstract: The redox capacity of Pt–CeO2 catalysts for low-temperature CO oxidation has been investigated by means of near-ambient pressure X-ray photoelectron spectroscopy, synchrotron radiation photoelectron spectroscopy, and resonant photoemission spectroscopy. The...

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Cited by 7 publications

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Mechanistic Study of Ethanol Decomposition on Co₃O₄(111) and Pd/Co₃O₄(111) Model Catalysts

Reindl,

Škvára,

Hauner

et al. 2024

ChemCatChem

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In many advanced catalytic materials, different functionalities are coupled through spillover of active species across heterogeneous interfaces. In the present work, we consider the coupling of a C−C bond cleavage functionality of palladium with the self‐cleaning functionality of reducible Co3O4. On the model catalysts Pd/Co3O4(111)/Ir(100), we probed the interplay of the two functionalities for the selective decomposition of ethanol. In a systematic study, we compared the decomposition mechanisms of ethanol on Co3O4(111)/Ir(100) and Pd/Co3O4(111)/Ir(100) model catalysts using a variety of analytical techniques including synchrotron radiation photoelectron spectroscopy (SRPES), resonant photoemission spectroscopy (RPES), temperature programmed desorption (TPD), and near ambient pressure X‐ray photoelectron spectroscopy (NAP‐XPS). We found that ethanol decomposes via an ethoxy intermediate yielding acetaldehyde on Co3O4(111)/Ir(100). Remarkably, the spillover of ethanol/ethoxy species on Pd/Co3O4(111)/Ir(100) results in the selective formation of methane, hydrogen, and CO. Additionally, we observed CO2 resulting from the oxidative removal of carbonaceous deposits on Pd nanoparticles via spillover of active oxygen species released by Co3O4(111)/Ir(100) at higher temperatures. The onset of product formation and the product spectrum on both Co3O4(111)/Ir(100) and Pd/Co3O4(111)/Ir(100) depend strongly on the oxidation state of Co3O4. Complete removal of lattice oxygen from Co3O4(111) results in the deposition of large amounts of carbon.

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Mechanistic Study of Ethanol Decomposition on Co₃O₄(111) and Pd/Co₃O₄(111) Model Catalysts

Reindl,

Škvára,

Hauner

et al. 2024

ChemCatChem

View full text Add to dashboard Cite

show abstract

Insights into the dynamics of supported Au nanoparticles in the wet environments from first-principles and ReaxFF MD simulations

Yang,

Li,

Zhang

et al. 2025

Applied Surface Science

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Probing Pt-CeO2 interfacial interactions through adsorption characteristics of small molecules

Mohammadpour,

Kaya

2024

Journal of Catalysis

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Probing the redox capacity of Pt–CeO₂ model catalyst for low-temperature CO oxidation

Abstract: The redox capacity of Pt–CeO2 catalysts for low-temperature CO oxidation has been investigated by means of near-ambient pressure X-ray photoelectron spectroscopy, synchrotron radiation photoelectron spectroscopy, and resonant photoemission spectroscopy. The...

Cited by 7 publications

References 47 publications

Mechanistic Study of Ethanol Decomposition on Co₃O₄(111) and Pd/Co₃O₄(111) Model Catalysts

Mechanistic Study of Ethanol Decomposition on Co₃O₄(111) and Pd/Co₃O₄(111) Model Catalysts

Insights into the dynamics of supported Au nanoparticles in the wet environments from first-principles and ReaxFF MD simulations

Probing Pt-CeO2 interfacial interactions through adsorption characteristics of small molecules

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Probing the redox capacity of Pt–CeO2 model catalyst for low-temperature CO oxidation

Abstract: The redox capacity of Pt–CeO2 catalysts for low-temperature CO oxidation has been investigated by means of near-ambient pressure X-ray photoelectron spectroscopy, synchrotron radiation photoelectron spectroscopy, and resonant photoemission spectroscopy. The...

Cited by 7 publications

References 47 publications

Mechanistic Study of Ethanol Decomposition on Co3O4(111) and Pd/Co3O4(111) Model Catalysts

Mechanistic Study of Ethanol Decomposition on Co3O4(111) and Pd/Co3O4(111) Model Catalysts

Insights into the dynamics of supported Au nanoparticles in the wet environments from first-principles and ReaxFF MD simulations

Probing Pt-CeO2 interfacial interactions through adsorption characteristics of small molecules

Contact Info

Product

Resources

About

Probing the redox capacity of Pt–CeO₂ model catalyst for low-temperature CO oxidation

Mechanistic Study of Ethanol Decomposition on Co₃O₄(111) and Pd/Co₃O₄(111) Model Catalysts

Mechanistic Study of Ethanol Decomposition on Co₃O₄(111) and Pd/Co₃O₄(111) Model Catalysts