Low-Temperature Catalytic NO Reduction with CO by Subnanometric Pt Clusters
Fernández E. ; Liu L. ; Boronat M. ; Arenal R. (Universidad de Zaragoza) ; Concepcion P. ; Corma A.
Resumen: The catalytic subnanometric metal clusters with a few atoms can be regarded as an intermediate state between single atoms and metal nanoparticles (>1 nm). Their molecule-like electronic structures and flexible geometric structures bring rich chemistry and also a different catalytic behavior, in comparison with the single-atom or nanoparticulate counterparts. In this work, by combination of operando IR spectroscopy techniques and electronic structure calculations, we will show a comparative study on Pt catalysts for CO + NO reaction at a very low temperature range (140-200 K). It has been found that single Pt atoms immobilized on MCM-22 zeolite are not stable under reaction conditions and agglomerate into Pt nanoclusters and particles, which are the working active sites for CO + NO reaction. In the case of the catalyst containing Pt nanoparticles (~2 nm), the oxidation of CO to CO2 occurs in a much lower extension, and Pt nanoparticles become poisoned under reaction conditions because of a strong interaction with CO and NO. Therefore, only subnanometric Pt clusters allow NO dissociation at a low temperature and CO oxidation to occur well on the surface, while CO interaction is weak enough to avoid catalyst poisoning, resulting in a good balance to achieve enhanced catalytic performance.
Idioma: Inglés
DOI: 10.1021/acscatal.9b03207
Año: 2019
Publicado en: ACS CATALYSIS 9, 12 (2019), 11530-11541
ISSN: 2155-5435
Factor impacto JCR: 12.35 (2019)
Categ. JCR: CHEMISTRY, PHYSICAL rank: 12 / 159 = 0.075 (2019) - Q1 - T1
Factor impacto SCIMAGO: 4.633 - Chemistry (miscellaneous) (Q1) - Catalysis (Q1)
Financiación: info:eu-repo/grantAgreement/ES/DGA/E13-17R
Financiación: info:eu-repo/grantAgreement/EC/H2020/823717/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM3
Financiación: info:eu-repo/grantAgreement/ES/MINECO-AEI-FEDER/MAT2016-79776-P
Tipo y forma: Article (Published version)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.
Exportado de SIDERAL (2020-10-22-13:50:40)
Visitas y descargas
Idioma: Inglés
DOI: 10.1021/acscatal.9b03207
Año: 2019
Publicado en: ACS CATALYSIS 9, 12 (2019), 11530-11541
ISSN: 2155-5435
Factor impacto JCR: 12.35 (2019)
Categ. JCR: CHEMISTRY, PHYSICAL rank: 12 / 159 = 0.075 (2019) - Q1 - T1
Factor impacto SCIMAGO: 4.633 - Chemistry (miscellaneous) (Q1) - Catalysis (Q1)
Financiación: info:eu-repo/grantAgreement/ES/DGA/E13-17R
Financiación: info:eu-repo/grantAgreement/EC/H2020/823717/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM3
Financiación: info:eu-repo/grantAgreement/ES/MINECO-AEI-FEDER/MAT2016-79776-P
Tipo y forma: Article (Published version)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. Exportado de SIDERAL (2020-10-22-13:50:40)
Permalink:
Visitas y descargas
Este artículo se encuentra en las siguientes colecciones:
Articles > Artículos por área > Física de la Materia Condensada
Record created 2020-02-21, last modified 2020-10-22