Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/203350
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Determination of the evolution of heterogeneous single metal atoms and nanoclusters under reaction conditions: Which are the working catalytic sites? |
Autor: | Liu, Lichen; Meira, Debora M.; Arenal, Raúl CSIC ORCID; Concepción, Patricia CSIC ORCID; Puga, Alberto V.; Corma, Avelino CSIC ORCID | Fecha de publicación: | 25-oct-2019 | Editor: | American Chemical Society | Citación: | ACS Catalysis 9(12): 10626-10639 (2019) | Resumen: | Identification of active sites in heterogeneous metal catalysts is critical for understanding the reaction mechanism at the molecular level and for designing more efficient catalysts. Because of their structural flexibility, subnanometric metal catalysts, including single atoms and clusters with a few atoms, can exhibit dynamic structural evolution when interacting with substrate molecules, making it difficult to determine the catalytically active sites. In this work, Pt catalysts containing selected types of Pt entities (from single atoms to clusters and nanoparticles) have been prepared, and their evolution has been followed, while they were reacting in a variety of heterogeneous catalytic reactions, including selective hydrogenation reactions, CO oxidation, dehydrogenation of propane, and photocatalytic H2 evolution reaction. By in situ X-ray absorption spectroscopy, in situ IR spectroscopy, and high-resolution electron microscopy techniques, we will show that some characterization techniques carried out in an inadequate way can introduce confusion on the interpretation of coordination environment of highly dispersed Pt species. Finally, the combination of catalytic reactivity and in situ characterization techniques shows that, depending on the catalyst–reactant interaction and metal–support interaction, singly dispersed metal atoms can rapidly evolve into metal clusters or nanoparticles, being the working active sites for those abovementioned heterogeneous reactions. | Versión del editor: | https://doi.org/10.1021/acscatal.9b04214 | URI: | http://hdl.handle.net/10261/203350 | DOI: | 10.1021/acscatal.9b04214 | Identificadores: | doi: 10.1021/acscatal.9b04214 issn: 2155-5435 |
Aparece en las colecciones: | (ITQ) Artículos (ICMA) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
determisite.pdf | 2,68 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
PubMed Central
Citations
22
checked on 19-abr-2024
SCOPUSTM
Citations
192
checked on 24-abr-2024
WEB OF SCIENCETM
Citations
180
checked on 27-feb-2024
Page view(s)
172
checked on 23-abr-2024
Download(s)
192
checked on 23-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
Artículos relacionados:
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.