Metal–Support Interaction in Pd/CeO2 Model Catalysts for CO Oxidation: From Pulsed Laser-Ablated Nanoparticles to Highly Active State of the Catalyst Full article
| Journal |
Catalysis Science and Technology
ISSN: 2044-4753 , E-ISSN: 2044-4761 |
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| Output data | Year: 2016, Volume: 6, Number: 17, Pages: 6650-6666 Pages count : 17 DOI: 10.1039/c6cy00319b | ||||||
| Tags | Ablation; Catalyst activity; Catalysts; Cerium; Cerium compounds; Laser ablation; Nanoparticles; Oxides; Pulsed lasers; Solid solutions; Synthesis (chemical); X ray photoelectron spectroscopy | ||||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Federal Agency for Scientific Organizations | V.44.1.16. |
| 2 | The Ministry of Education and Science of the Russian Federation |
Abstract:
Palladium and cerium oxide nanoparticles obtained by pulsed laser ablation (PLA) in liquid (water or ethanol) have been used as nanostructured precursors for the synthesis of composite Pd/CeO2 catalysts. The initial mixture of Pd and CeO2 nanoparticles does not show catalytic activity at temperatures lower than 100 °C. It has been found that the composites prepared by PLA in alcohol are easily activated by calcination in air at 450–600 °C, demonstrating a high level of activity at room temperature. Application of XRD, TEM and XPS reveals that laser ablation in water leads to the formation of large and well-crystallized nanoparticles of palladium and CeO2, whereas ablation in alcohol results in the formation of much smaller PdCx nanoparticles. The activation of the composites takes place due to the strong Pd–ceria interaction which occurs more easily for highly dispersed defective particles obtained in alcohol. Such an interaction implies the introduction of palladium ions into the ceria lattice with the formation of a mixed phase of PdxCe1−xO2−x−δ solid solution at the contact spaces of palladium and cerium oxide nanoparticles. TPR-CO and XPS data show clearly that on the surface of the PdxCe1−xO2−x−δ solid solution the oxidized PdOx(s)/Pd–O–Ce(s) clusters are formed. These clusters are composed of highly reactive oxygen which is responsible for the high level of catalytic activity in LTO CO.
Cite:
Slavinskaya E.M.
, Kardash T.Y.
, Stonkus O.A.
, Gulyaev R.V.
, Lapin I.N.
, Svetlichnyi V.A.
, Boronin A.I.
Metal–Support Interaction in Pd/CeO2 Model Catalysts for CO Oxidation: From Pulsed Laser-Ablated Nanoparticles to Highly Active State of the Catalyst
Catalysis Science and Technology. 2016. V.6. N17. P.6650-6666. DOI: 10.1039/c6cy00319b WOS Scopus РИНЦ ANCAN OpenAlex
Metal–Support Interaction in Pd/CeO2 Model Catalysts for CO Oxidation: From Pulsed Laser-Ablated Nanoparticles to Highly Active State of the Catalyst
Catalysis Science and Technology. 2016. V.6. N17. P.6650-6666. DOI: 10.1039/c6cy00319b WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Feb 10, 2016 |
| Accepted: | Jun 13, 2016 |
| Published online: | Jun 13, 2016 |
Identifiers:
| Web of science: | WOS:000382025300022 |
| Scopus: | 2-s2.0-84983565496 |
| Elibrary: | 26673065 |
| Chemical Abstracts: | 2016:962537 |
| Chemical Abstracts (print): | 165:304600 |
| OpenAlex: | W2417722334 |