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dc.contributor.author
Huck Iriart, Cristián
dc.contributor.author
Soler, Lluís
dc.contributor.author
Casanovas, Albert
dc.contributor.author
Marini, Carlo
dc.contributor.author
Prat, Jordi
dc.contributor.author
Llorca Piqué, Jordi
dc.contributor.author
Escudero, Carlos
dc.date.available
2022-11-15T17:53:56Z
dc.date.issued
2018-10
dc.identifier.citation
Huck Iriart, Cristián; Soler, Lluís; Casanovas, Albert; Marini, Carlo; Prat, Jordi; et al.; Unraveling the Chemical State of Cobalt in Co-Based Catalysts during Ethanol Steam Reforming: An in Situ Study by Near Ambient Pressure XPS and XANES; American Chemical Society; ACS Catalysis; 8; 10; 10-2018; 9625-9636
dc.identifier.issn
2155-5435
dc.identifier.uri
http://hdl.handle.net/11336/177868
dc.description.abstract
The steam reforming of ethanol (ESR) has been studied by near ambient pressure XPS (NAP-XPS), extended X-ray absorption fine structure (EXAFS), and X-ray absorption near edge structure (XANES) under in situ conditions in the ALBA synchrotron facility at 200-580 °C and S/C = 3 over different cobalt-based catalysts that showed different catalytic performances: Co3[Si2O5]2(OH)2 (Co-talc), [Co2Mg4Al2(OH)16]CO3·4H2O (Co-hydrotalcite shortened to Co-HT) calcined at 550 °C, and Co3O4 (Co-spinel). Both Co-spinel and Co-talc yield to a greater or lesser degree metallic cobalt under ESR conditions. While Co-spinel shows a complete reduction to metallic cobalt under the conditions used for the XANES measurements, the more bulk-sensitive Co-talc sample exhibits only a partial reduction. On the other hand, under the ESR conditions used with the NAP-XPS, a more surface sensitive technique, the results indicate a higher reduction degree for the Co-talc sample in comparison to the Co-spinel sample. In contrast, the catalyst prepared from the Co-HT does not show metallic cobalt traces under the experimental conditions used with both techniques. On comparison of these three cobalt-based catalysts, the stable operation exhibited by Co-HT under ESR reaction conditions is justified by the absence of metallic cobalt formation under in situ conditions, which is identified as being responsible for the carbon deposition phenomenon that triggers the deactivation suffered by most cobalt-based catalysts during ESR.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Chemical Society
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Co-Based Catalysts
dc.subject
ETHANOL STEAM REFORMING
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NEAR AMBIENT PRESSURE XPS
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XANES
dc.subject.classification
Otras Ingeniería Química
dc.subject.classification
Ingeniería Química
dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
dc.title
Unraveling the Chemical State of Cobalt in Co-Based Catalysts during Ethanol Steam Reforming: An in Situ Study by Near Ambient Pressure XPS and XANES
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-11-14T11:19:02Z
dc.journal.volume
8
dc.journal.number
10
dc.journal.pagination
9625-9636
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Huck Iriart, Cristián. Universidad Nacional de San Martín. Escuela de Ciencia y Tecnología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Soler, Lluís. Universidad Politécnica de Catalunya; España
dc.description.fil
Fil: Casanovas, Albert. Universidad Politécnica de Catalunya; España
dc.description.fil
Fil: Marini, Carlo. Universidad Politécnica de Catalunya; España
dc.description.fil
Fil: Prat, Jordi. No especifíca;
dc.description.fil
Fil: Llorca Piqué, Jordi. Universidad Politécnica de Catalunya; España
dc.description.fil
Fil: Escudero, Carlos. Universidad Politécnica de Catalunya; España
dc.journal.title
ACS Catalysis
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://pubs.acs.org/doi/10.1021/acscatal.8b02666
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1021/acscatal.8b02666
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