Pd-Ce-Ox Species on MWCNTs Surface: Probing the Structure-Activity Correlation in Low-Temperature CO Oxidation Full article
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Applied Surface Science
ISSN: 0169-4332 |
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| Output data | Year: 2023, Volume: 611, Number: Part B, Article number : 155750, Pages count : 12 DOI: 10.1016/j.apsusc.2022.155750 | ||||||
| Tags | Palladium; Ceria; MWCNTs; Wet CO oxidation; Metal-support interaction | ||||||
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| Affiliations |
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Funding (1)
| 1 | Russian Science Foundation | 21-13-00094 |
Abstract:
Herein, the highly dispersed palladium and ceria species were deposted on the surface of multi-walled carbon nanotubes (MWCNTs) by co-deposition from acetone solutions. The use of MWCNTs allowed varying Pd/Ce atomic ratio in a wide range, while maintaining a high dispersion of the active components. Application of physicochemical methods revealed the formation of various palladium species. Single Pd2+ ions dispersed in CeO2 lattice were the main Pd-Ce-Ox species at low Pdat/Ceat ratio. With an increase of the Pd content in the samples the preferential formation of PdO particles in a tight contact with CeO2 nanoparticles was observed. The size of PdO and CeO2 primary particles was in a range of 1–5 nm.
The Pd-Ce-Ox/MWCNTs samples showed high activity in the CO oxidation reaction already at room temperature with a temperature of 50% CO conversion below 100 °C. The Pd2+-CeO2 and PdO-CeO2 species demonstrated the comparable activity in “dry” CO oxidation. However, the presence of water vapor in the reaction mixture resulted in the immediate deactivation of Pd2+-CeO2 species, while PdO-CeO2 species retained a high activity at 20°С. The results of the work highlight the benefits of MWCNTs, Pd, and CeO2 combination for obtaining catalysts highly active in CO oxidation.
Cite:
Kibis L.S.
, Zadesenets A.V.
, Garkul I.A.
, Korobova A.N.
, Kardash T.Y.
, Fedorova E.A.
, Slavinskaya E.M.
, Stonkus O.A.
, Korenev S.V.
, Podyacheva O.Y.
, Boronin A.I.
Pd-Ce-Ox Species on MWCNTs Surface: Probing the Structure-Activity Correlation in Low-Temperature CO Oxidation
Applied Surface Science. 2023. V.611. NPart B. 155750 :1-12. DOI: 10.1016/j.apsusc.2022.155750 WOS Scopus РИНЦ AN OpenAlex
Pd-Ce-Ox Species on MWCNTs Surface: Probing the Structure-Activity Correlation in Low-Temperature CO Oxidation
Applied Surface Science. 2023. V.611. NPart B. 155750 :1-12. DOI: 10.1016/j.apsusc.2022.155750 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Sep 3, 2022 |
| Accepted: | Nov 15, 2022 |
| Published online: | Nov 22, 2022 |
| Published print: | Feb 15, 2023 |
Identifiers:
| Web of science: | WOS:000997402500001 |
| Scopus: | 2-s2.0-85142460451 |
| Elibrary: | 54017155 |
| Chemical Abstracts: | 2022:2989344 |
| OpenAlex: | W4309775662 |