Pt/CeO2 and Pt/CeSnOx catalysts for low-temperature CO oxidation prepared by plasma-arc technique
We applied a method of plasma arc synthesis to study effects of modification of the fluorite phase of ceria by tin ions. By sputtering active components (Pt, Ce, Sn) together with carbon from a graphite electrode in a helium ambient we prepared samples of complex highly defective composite PtCeC and...
| Autores: | , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2019 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/165047 |
| Acceso en línea: | https://hdl.handle.net/2445/165047 |
| Access Level: | acceso abierto |
| Palabra clave: | Ions Platí Oxidació Catalitzadors Platinum Oxidation Catalysts |
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Pt/CeO2 and Pt/CeSnOx catalysts for low-temperature CO oxidation prepared by plasma-arc techniqueKardash, Tatyana Y.Derevyannikova, ElizavetaSlavinskaya, Elena M.Stadnichenko, Andrey I.Maltsev, Vasiliy A.Zaikovskii, Alexey V.Novopashin, Sergey A.Boronin, Andrei I.Neyman, Konstantin M.IonsPlatíOxidacióCatalitzadorsIonsPlatinumOxidationCatalystsWe applied a method of plasma arc synthesis to study effects of modification of the fluorite phase of ceria by tin ions. By sputtering active components (Pt, Ce, Sn) together with carbon from a graphite electrode in a helium ambient we prepared samples of complex highly defective composite PtCeC and PtCeSnC oxide particles stabilized in a matrix of carbon. Subsequent high-temperature annealing of the samples in oxygen removes the carbon matrix and causes the formation of active catalysts Pt/CeOx and Pt/CeSnOx for CO oxidation. In the presence of Sn, X-Ray Diffraction (XRD) and High-Resolution Transmission Electron Microscopy (HRTEM) show formation of a mixed phase CeSnOx and stabilization of more dispersed species with a fluorite-type structure. These factors are essential for the observed high activity and thermic stability of the catalyst modified by Sn. X-Ray Photoelectron Spectroscopy (XPS) reveals the presence of both Pt2+ and Pt4+ ions in the catalyst Pt/CeOx, whereas only the state Pt2+ of platinum could be detected in the Sn-modified catalyst Pt/CeSnOx. Insertion of Sn ions into the Pt/CeOx lattice destabilizes/reduces Pt4+ cations in the Pt/CeSnOx catalyst and induces formation of strikingly high concentration (up to 50% at.) of lattice Ce3+ ions. Our DFT calculations corroborate destabilization of Pt4+ ions by incorporation of cationic Sn in Pt/CeOx. The presented results show that modification of the fluorite lattice of ceria by tin induces substantial amount of mobile reactive oxygen partly due to affecting geometric parameters of ceria by tin ions.Frontiers Media2020202020192020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion17 p.application/pdfhttps://hdl.handle.net/2445/165047Articles publicats en revistes (Ciència dels Materials i Química Física)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.3389/fchem.2019.00114Frontiers in Chemistry, 2019, vol. 7, p. 114https://doi.org/10.3389/fchem.2019.00114cc-by (c) Kardash, Tatyana Y. et al., 2019http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:recercat.cat:2445/1650472026-05-29T05:05:01Z |
| dc.title.none.fl_str_mv |
Pt/CeO2 and Pt/CeSnOx catalysts for low-temperature CO oxidation prepared by plasma-arc technique |
| title |
Pt/CeO2 and Pt/CeSnOx catalysts for low-temperature CO oxidation prepared by plasma-arc technique |
| spellingShingle |
Pt/CeO2 and Pt/CeSnOx catalysts for low-temperature CO oxidation prepared by plasma-arc technique Kardash, Tatyana Y. Ions Platí Oxidació Catalitzadors Ions Platinum Oxidation Catalysts |
| title_short |
Pt/CeO2 and Pt/CeSnOx catalysts for low-temperature CO oxidation prepared by plasma-arc technique |
| title_full |
Pt/CeO2 and Pt/CeSnOx catalysts for low-temperature CO oxidation prepared by plasma-arc technique |
| title_fullStr |
Pt/CeO2 and Pt/CeSnOx catalysts for low-temperature CO oxidation prepared by plasma-arc technique |
| title_full_unstemmed |
Pt/CeO2 and Pt/CeSnOx catalysts for low-temperature CO oxidation prepared by plasma-arc technique |
| title_sort |
Pt/CeO2 and Pt/CeSnOx catalysts for low-temperature CO oxidation prepared by plasma-arc technique |
| dc.creator.none.fl_str_mv |
Kardash, Tatyana Y. Derevyannikova, Elizaveta Slavinskaya, Elena M. Stadnichenko, Andrey I. Maltsev, Vasiliy A. Zaikovskii, Alexey V. Novopashin, Sergey A. Boronin, Andrei I. Neyman, Konstantin M. |
| author |
Kardash, Tatyana Y. |
| author_facet |
Kardash, Tatyana Y. Derevyannikova, Elizaveta Slavinskaya, Elena M. Stadnichenko, Andrey I. Maltsev, Vasiliy A. Zaikovskii, Alexey V. Novopashin, Sergey A. Boronin, Andrei I. Neyman, Konstantin M. |
| author_role |
author |
| author2 |
Derevyannikova, Elizaveta Slavinskaya, Elena M. Stadnichenko, Andrey I. Maltsev, Vasiliy A. Zaikovskii, Alexey V. Novopashin, Sergey A. Boronin, Andrei I. Neyman, Konstantin M. |
| author2_role |
author author author author author author author author |
| dc.subject.none.fl_str_mv |
Ions Platí Oxidació Catalitzadors Ions Platinum Oxidation Catalysts |
| topic |
Ions Platí Oxidació Catalitzadors Ions Platinum Oxidation Catalysts |
| description |
We applied a method of plasma arc synthesis to study effects of modification of the fluorite phase of ceria by tin ions. By sputtering active components (Pt, Ce, Sn) together with carbon from a graphite electrode in a helium ambient we prepared samples of complex highly defective composite PtCeC and PtCeSnC oxide particles stabilized in a matrix of carbon. Subsequent high-temperature annealing of the samples in oxygen removes the carbon matrix and causes the formation of active catalysts Pt/CeOx and Pt/CeSnOx for CO oxidation. In the presence of Sn, X-Ray Diffraction (XRD) and High-Resolution Transmission Electron Microscopy (HRTEM) show formation of a mixed phase CeSnOx and stabilization of more dispersed species with a fluorite-type structure. These factors are essential for the observed high activity and thermic stability of the catalyst modified by Sn. X-Ray Photoelectron Spectroscopy (XPS) reveals the presence of both Pt2+ and Pt4+ ions in the catalyst Pt/CeOx, whereas only the state Pt2+ of platinum could be detected in the Sn-modified catalyst Pt/CeSnOx. Insertion of Sn ions into the Pt/CeOx lattice destabilizes/reduces Pt4+ cations in the Pt/CeSnOx catalyst and induces formation of strikingly high concentration (up to 50% at.) of lattice Ce3+ ions. Our DFT calculations corroborate destabilization of Pt4+ ions by incorporation of cationic Sn in Pt/CeOx. The presented results show that modification of the fluorite lattice of ceria by tin induces substantial amount of mobile reactive oxygen partly due to affecting geometric parameters of ceria by tin ions. |
| publishDate |
2019 |
| dc.date.none.fl_str_mv |
2019 2020 2020 2020 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
https://hdl.handle.net/2445/165047 |
| url |
https://hdl.handle.net/2445/165047 |
| dc.language.none.fl_str_mv |
Inglés |
| language_invalid_str_mv |
Inglés |
| dc.relation.none.fl_str_mv |
Reproducció del document publicat a: https://doi.org/10.3389/fchem.2019.00114 Frontiers in Chemistry, 2019, vol. 7, p. 114 https://doi.org/10.3389/fchem.2019.00114 |
| dc.rights.none.fl_str_mv |
cc-by (c) Kardash, Tatyana Y. et al., 2019 http://creativecommons.org/licenses/by/3.0/es info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
cc-by (c) Kardash, Tatyana Y. et al., 2019 http://creativecommons.org/licenses/by/3.0/es |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
17 p. application/pdf |
| dc.publisher.none.fl_str_mv |
Frontiers Media |
| publisher.none.fl_str_mv |
Frontiers Media |
| dc.source.none.fl_str_mv |
Articles publicats en revistes (Ciència dels Materials i Química Física) reponame:Recercat. Dipósit de la Recerca de Catalunya instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| instname_str |
Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
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Recercat. Dipósit de la Recerca de Catalunya |
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Recercat. Dipósit de la Recerca de Catalunya |
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