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dc.contributor.author | López-Hernández, I. | es_ES |
dc.contributor.author | Truttmann, V. | es_ES |
dc.contributor.author | Garcia, C. | es_ES |
dc.contributor.author | W. Lopes, C. | es_ES |
dc.contributor.author | Rameshan, C. | es_ES |
dc.contributor.author | Stöger-Pollach, M. | es_ES |
dc.contributor.author | Barrabés, N. | es_ES |
dc.contributor.author | Rupprechter, G. | es_ES |
dc.contributor.author | Rey Garcia, Fernando | es_ES |
dc.contributor.author | Palomares Gimeno, Antonio Eduardo | es_ES |
dc.date.accessioned | 2023-06-23T18:02:05Z | |
dc.date.available | 2023-06-23T18:02:05Z | |
dc.date.issued | 2022-02-15 | es_ES |
dc.identifier.issn | 0920-5861 | es_ES |
dc.identifier.uri | http://hdl.handle.net/10251/194515 | |
dc.description.abstract | [EN] The bimetallic nanocluster catalyst structure can change during pretreatment and reaction, thus in situ characterization techniques are required for a proper analysis of the active sites. In situ XAFS and DRIFTS were used to study the dynamic evolution of the metal active sites in bimetallic AgxAu25-x nanoclusters supported on ITQ2 zeolite during CO catalytic oxidation. The activity of the bimetallic nanocluster catalyst in this reaction was significantly higher than those of supported monometallic Ag-25 and Au-25 nanoclusters. These results were explained by the formation of AgAu alloyed nanoparticles, which favoured reactant adsorption and reaction. Furthermore, the initial activity depended on the catalyst pretreatment, obtaining better conversion, at lower temperatures, with the catalyst pretreated with hydrogen than with the catalyst pretreated with oxygen. This was also associated with an easier formation of a AgAu alloy under hydrogen pretreatment at 150 degrees C. However, the alloying process seemed to be completed after reaction in both cases, i.e. for the catalyst pretreated with oxygen and with hydrogen, obtaining the same catalytic performance with both catalysts upon reuse. The activity is constant in successive reaction runs, indicating high stability of the active species formed under reaction conditions. The results have shown that the combination of catalytic studies with in situ characterization techniques provides insight into the structural dynamics of the catalysts during activation and reaction. | es_ES |
dc.description.sponsorship | The authors thank the Spanish Ministry of Economy and Competitiveness through RTI2018-101784-B-I00 (MINECO/FEDER) and SEV-2016-0683 projects for the financial support. I. Lopez Hernandez is grateful to Generalitat Valenciana and European Social Fund for the pre doctoral grant ACIF2017. C.W.L. thanks PRH 50.1 - ANP/FINEP Human Resources Program (Brazil) for the Visiting Researcher Fellowship. We gratefully acknowledge ALBA synchrotron for allocating beamtime (proposal 2015091414) and the CL AE SS beamline staff for their help and technical support during our experiment. We acknowledge support by the Austrian Science Fund (FWF) via grants DK+Solids4Fun (W1243) , Single Atom Catalysis (I 4434-N) and Elise Richter (V831-N) . | es_ES |
dc.language | Inglés | es_ES |
dc.publisher | Elsevier | es_ES |
dc.relation.ispartof | Catalysis Today | es_ES |
dc.rights | Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) | es_ES |
dc.subject | CO oxidation | es_ES |
dc.subject | Metal nanoclusters | es_ES |
dc.subject | Doping | es_ES |
dc.subject | Silver | es_ES |
dc.subject | Gold | es_ES |
dc.subject | Zeolites | es_ES |
dc.subject.classification | INGENIERIA QUIMICA | es_ES |
dc.title | AgAu nanoclusters supported on zeolites: Structural dynamics during CO oxidation | es_ES |
dc.type | Artículo | es_ES |
dc.identifier.doi | 10.1016/j.cattod.2021.04.016 | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-101784-B-I00/ES/NUEVOS MATERIALES ZEOLITICOS PARA PROCESOS DE SEPARACION SELECTIVA DE GASES, APLICACIONES MEDIOAMBIENTALES Y CONSERVACION DE ALIMENTOS/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/GVA//ACIF%2F2017%2F079//AYUDA PREDOCTORAL CONSELLERIA-LOPEZ HERNANDEZ. PROYECTO: NUEVOS SISTEMAS CATALITICOS PARA LA ELIMINACION DE GASES CONTAMINANTES PRECURSORES DE OZONO./ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/MINECO//SEV-2016-0683/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/FINEP//PRH 50.1//Human Resources Program (Brazil) ANP(Agencia Nacional de Petróleo, Gas y Biocombustible)/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/FWF//I 4434-N//Single Atom Catalysis/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/FWF//W1243//DK + Solids4Fun/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/FWF//V831-N/ | es_ES |
dc.rights.accessRights | Abierto | es_ES |
dc.contributor.affiliation | Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros Industriales - Escola Tècnica Superior d'Enginyers Industrials | es_ES |
dc.description.bibliographicCitation | López-Hernández, I.; Truttmann, V.; Garcia, C.; W. Lopes, C.; Rameshan, C.; Stöger-Pollach, M.; Barrabés, N.... (2022). AgAu nanoclusters supported on zeolites: Structural dynamics during CO oxidation. Catalysis Today. 384:166-176. https://doi.org/10.1016/j.cattod.2021.04.016 | es_ES |
dc.description.accrualMethod | S | es_ES |
dc.relation.publisherversion | https://doi.org/10.1016/j.cattod.2021.04.016 | es_ES |
dc.description.upvformatpinicio | 166 | es_ES |
dc.description.upvformatpfin | 176 | es_ES |
dc.type.version | info:eu-repo/semantics/publishedVersion | es_ES |
dc.description.volume | 384 | es_ES |
dc.relation.pasarela | S\464058 | es_ES |
dc.contributor.funder | Austrian Science Fund | es_ES |
dc.contributor.funder | Generalitat Valenciana | es_ES |
dc.contributor.funder | European Regional Development Fund | es_ES |
dc.contributor.funder | Financiadora de Estudos e Projetos, Brasil | es_ES |
dc.contributor.funder | Ministerio de Ciencia, Innovación y Universidades | es_ES |
dc.contributor.funder | Ministerio de Economía, Industria y Competitividad | es_ES |