Gold–Ceria SBA-15-Supported Catalyst for CO Preferential Oxidation: Surface and Reactivity Studies
In this article, the preparation and application of gold and cerium catalysts supported on zirconium-doped mesoporous silica SBA-15 was studied. These materials have been prepared by two different methods and characterized to investigate their textural properties, dispersion of the active phases and...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2012-09-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.30.8-9.751 |
| _version_ | 1826904947799621632 |
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| author | Álvaro Reyes-Carmona Aldo Talon Elisa Moretti Maurizio Lenarda Antonio Jiménez-López Enrique Rodríguez-Castellón |
| author_facet | Álvaro Reyes-Carmona Aldo Talon Elisa Moretti Maurizio Lenarda Antonio Jiménez-López Enrique Rodríguez-Castellón |
| author_sort | Álvaro Reyes-Carmona |
| collection | DOAJ |
| description | In this article, the preparation and application of gold and cerium catalysts supported on zirconium-doped mesoporous silica SBA-15 was studied. These materials have been prepared by two different methods and characterized to investigate their textural properties, dispersion of the active phases and oxidation states. Both materials exhibit a marked catalytic activity. The size of the gold nanoparticles is directly related to the CO conversion rate and to the selectivity towards CO 2 exhibiting a strong temperature dependence. An X-ray photoelectron spectroscopic study of the composition and chemical state of the nanoparticles indicates the presence of Au in a metallic state. Transmission electron microscopic micrographs indicate that the best catalyst shows a higher dispersion of Au in spite of its lower gold surface content. |
| first_indexed | 2024-03-07T17:09:25Z |
| format | Article |
| id | doaj.art-03bc6e905e2a4cb9a5f5838a19c69e00 |
| institution | Directory Open Access Journal |
| issn | 0263-6174 2048-4038 |
| language | English |
| last_indexed | 2025-02-17T08:20:21Z |
| publishDate | 2012-09-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj.art-03bc6e905e2a4cb9a5f5838a19c69e002025-01-02T23:11:15ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382012-09-013010.1260/0263-6174.30.8-9.751Gold–Ceria SBA-15-Supported Catalyst for CO Preferential Oxidation: Surface and Reactivity StudiesÁlvaro Reyes-Carmona0Aldo Talon1Elisa Moretti2Maurizio Lenarda3Antonio Jiménez-López4Enrique Rodríguez-Castellón5 Institut Charles Gerhardt UMR 5253, Agrégats, Interfaces et Matériaux pour l'Energie, Université Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France Dipartimento di Scienze Molecolari e Nanosistemi, Universitá Ca'Foscari di Venezia, Via Torino 155/B, 30172 Venezia, Italy Dipartimento di Scienze Molecolari e Nanosistemi, Universitá Ca'Foscari di Venezia, Via Torino 155/B, 30172 Venezia, Italy Dipartimento di Scienze Molecolari e Nanosistemi, Universitá Ca'Foscari di Venezia, Via Torino 155/B, 30172 Venezia, Italy Departamento de Química Inorgánica, Cristalografía y Mineralogía, Unidad Asociada al Instituto de Catálisis (CSIC), Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain Departamento de Química Inorgánica, Cristalografía y Mineralogía, Unidad Asociada al Instituto de Catálisis (CSIC), Universidad de Málaga, Campus de Teatinos, 29071 Málaga, SpainIn this article, the preparation and application of gold and cerium catalysts supported on zirconium-doped mesoporous silica SBA-15 was studied. These materials have been prepared by two different methods and characterized to investigate their textural properties, dispersion of the active phases and oxidation states. Both materials exhibit a marked catalytic activity. The size of the gold nanoparticles is directly related to the CO conversion rate and to the selectivity towards CO 2 exhibiting a strong temperature dependence. An X-ray photoelectron spectroscopic study of the composition and chemical state of the nanoparticles indicates the presence of Au in a metallic state. Transmission electron microscopic micrographs indicate that the best catalyst shows a higher dispersion of Au in spite of its lower gold surface content.https://doi.org/10.1260/0263-6174.30.8-9.751 |
| spellingShingle | Álvaro Reyes-Carmona Aldo Talon Elisa Moretti Maurizio Lenarda Antonio Jiménez-López Enrique Rodríguez-Castellón Gold–Ceria SBA-15-Supported Catalyst for CO Preferential Oxidation: Surface and Reactivity Studies Adsorption Science & Technology |
| title | Gold–Ceria SBA-15-Supported Catalyst for CO Preferential Oxidation: Surface and Reactivity Studies |
| title_full | Gold–Ceria SBA-15-Supported Catalyst for CO Preferential Oxidation: Surface and Reactivity Studies |
| title_fullStr | Gold–Ceria SBA-15-Supported Catalyst for CO Preferential Oxidation: Surface and Reactivity Studies |
| title_full_unstemmed | Gold–Ceria SBA-15-Supported Catalyst for CO Preferential Oxidation: Surface and Reactivity Studies |
| title_short | Gold–Ceria SBA-15-Supported Catalyst for CO Preferential Oxidation: Surface and Reactivity Studies |
| title_sort | gold ceria sba 15 supported catalyst for co preferential oxidation surface and reactivity studies |
| url | https://doi.org/10.1260/0263-6174.30.8-9.751 |
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