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dc.contributor.author | Wittee Lopes, Christian![]() |
es_ES |
dc.contributor.author | Cerrillo, José Luis![]() |
es_ES |
dc.contributor.author | Palomares Gimeno, Antonio Eduardo![]() |
es_ES |
dc.contributor.author | Rey Garcia, Fernando![]() |
es_ES |
dc.contributor.author | Agostini, G.![]() |
es_ES |
dc.date.accessioned | 2020-05-20T03:01:30Z | |
dc.date.available | 2020-05-20T03:01:30Z | |
dc.date.issued | 2018-05-14 | es_ES |
dc.identifier.issn | 1463-9076 | es_ES |
dc.identifier.uri | http://hdl.handle.net/10251/143781 | |
dc.description.abstract | [EN] The activation of precursor-dependent Pd nanoparticles was comprehensively followed by in situ X-ray absorption spectroscopy on two inorganic supports for rationalizing the final catalytic activity. Two series of Pd-based catalysts (7 wt% Pd) were prepared by impregnation of gamma-Al2O3 and activated carbon supports varying the metal precursor (Pd(NO3)(2), PdCl2 and Pd(OAc)(2)). The most relevant physicochemical properties of the studied catalysts were determined by several techniques including ICP-OES, XRD, N-2 adsorption and XAS. The results indicate that the thermal stability of the metal precursor plays an important role in the size and speciation of the formed Pd nanoparticles after the activation process. The Cl-based precursor, which presents high thermal stability, passes through a PdOxCly mixed phase when submitted to calcination on Pd/Al2O3 and leaves Cl-species after metal reduction on Pd/C (which can be detrimental to catalytic reactions). Differently, Pd(OAc)(2) and Pd(NO3)(2) promote the formation of larger species due to different precursor decomposition pathways. Ordered PdO is observed even before calcination when Pd(NO3)(2) was used as a metallic source, which translates into large nanoparticles after reduction in H-2. By using the average coordination numbers of Pd species obtained from EXAFS data of the as-reduced catalysts, a correlation was observed comparing the three precursors: PdCl2 generates smaller nanoparticles than Pd(OAc)(2), which in turn generates smaller nanoparticles than Pd(NO3)(2), regardless of the support used for catalyst preparation. | es_ES |
dc.description.sponsorship | The authors thank the Spanish Ministry of Economy and Competitiveness through MAT2015-71842-P (MINECO/FEDER) and SEV-2016-0683 projects for the financial support. We gratefully acknowledge ALBA synchrotron for allocating beamtime (proposal 2015091414), Carlo Marini and CLAESS beamline staff for their help and technical support during our experiment. C. W. Lopes (Science without Frontiers - Process no. 13191/13-6) thanks CAPES for a predoctoral fellowship. J.L. Cerrillo wishes to thank MINECO for the Severo Ochoa contract for PhD formation (SVP-2014-068600). | es_ES |
dc.language | Inglés | es_ES |
dc.publisher | The Royal Society of Chemistry | es_ES |
dc.relation.ispartof | Physical Chemistry Chemical Physics | es_ES |
dc.rights | Reserva de todos los derechos | es_ES |
dc.subject.classification | INGENIERIA QUIMICA | es_ES |
dc.title | An in situ XAS study of the activation of precursor-dependent Pd nanoparticles | es_ES |
dc.type | Artículo | es_ES |
dc.identifier.doi | 10.1039/C8CP00517F | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/CAPES//13191%2F13-6/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/MINECO//SVP-2014-068600/ES/SVP-2014-068600/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/MINECO//MAT2015-71842-P/ES/SINTESIS Y CARACTERIZACION AVANZADA DE NUEVOS MATERIALES ZEOLITICOS Y APLICACIONES EN ADSORCION, MEDIOAMBIENTE Y EN LA CONSERVACION DE ALIMENTOS/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/MINECO//SEV-2016-0683/ | es_ES |
dc.rights.accessRights | Abierto | es_ES |
dc.contributor.affiliation | Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química | es_ES |
dc.contributor.affiliation | Universitat Politècnica de València. Departamento de Ingeniería Química y Nuclear - Departament d'Enginyeria Química i Nuclear | es_ES |
dc.description.bibliographicCitation | Wittee Lopes, C.; Cerrillo, JL.; Palomares Gimeno, AE.; Rey Garcia, F.; Agostini, G. (2018). An in situ XAS study of the activation of precursor-dependent Pd nanoparticles. Physical Chemistry Chemical Physics. 20(18):12700-12709. https://doi.org/10.1039/C8CP00517F | es_ES |
dc.description.accrualMethod | S | es_ES |
dc.relation.publisherversion | https://doi.org/10.1039/C8CP00517F | es_ES |
dc.description.upvformatpinicio | 12700 | es_ES |
dc.description.upvformatpfin | 12709 | es_ES |
dc.type.version | info:eu-repo/semantics/publishedVersion | es_ES |
dc.description.volume | 20 | es_ES |
dc.description.issue | 18 | es_ES |
dc.identifier.pmid | 29697116 | es_ES |
dc.relation.pasarela | S\356558 | es_ES |
dc.contributor.funder | Ministerio de Economía y Competitividad | es_ES |
dc.contributor.funder | Coordenaçao de Aperfeiçoamento de Pessoal de Nível Superior, Brasil | es_ES |
dc.contributor.funder | European Regional Development Fund | es_ES |
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