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dc.contributor.author
Fresno, Fernando
dc.contributor.author
Galdón, Sandra
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Barawi, Mariam
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Alfonso González, Elena
dc.contributor.author
Escudero Rodríguez, Carlos
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dc.contributor.author
Pérez Dieste, Virginia
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Huck Iriart, Cristián
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dc.contributor.author
de la Peña O'Shea, Víctor A.
dc.date.available
2021-12-01T01:21:05Z
dc.date.issued
2021-02-01
dc.identifier.citation
Fresno, Fernando; Galdón, Sandra; Barawi, Mariam; Alfonso González, Elena; Escudero Rodríguez, Carlos; et al.; Selectivity in UV photocatalytic CO2 conversion over bare and silver-decorated niobium-tantalum perovskites; Elsevier Science; Catalysis Today; 361; 1-2-2021; 85-93
dc.identifier.issn
0920-5861
dc.identifier.uri
http://hdl.handle.net/11336/147806
dc.description.abstract
The hydrothermal synthesis of the perovskites NaNbO3, NaTaO3 and the intermediate composition NaNb0.5Ta0.5O3, as CO2 conversion photocatalysts is reported. Among them, the niobate shows the most promising performance under UV irradiation not only in terms of conversion and light utilization ability, but also regarding the selectivity towards CO2 reduction against hydrogen evolution from water protons. Further modification of NaNbO3 with silver as co-catalyst results in an increase of the selectivity towards highly reduced products, primarily methanol, against the carbon monoxide production mainly observed with the bare semiconductor. A thorough structural, electronic, electrochemical characterization, together with in-situ surface analysis by APXPS, was undertaken to gain deeper insight into the reasons that account for such changes. On the one hand, for the bare semiconductors, increased light absorption and the sole presence of Nb in +4 state at the surface seem to drive the superior activity of NaNbO3. On the other hand, electronic and surface chemistry modifications induced by 0.1 wt.% silver deposition are proposed to govern the higher selectivity towards methanol. Excessive metal loading, in turn, enhances the selectivity effect but at the expense of conversion, in such a way that light utilization becomes poorer than with the bare niobate.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
APXPS
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CO2 CONVERSION
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COCATALYST
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PEROVSKITE
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PHOTOCATALYSIS
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SILVER
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Química Inorgánica y Nuclear
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
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dc.title
Selectivity in UV photocatalytic CO2 conversion over bare and silver-decorated niobium-tantalum perovskites
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-10-29T13:16:27Z
dc.identifier.eissn
1873-4308
dc.journal.volume
361
dc.journal.pagination
85-93
dc.journal.pais
Países Bajos
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dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Fresno, Fernando. Instituto Imdea Energia; España
dc.description.fil
Fil: Galdón, Sandra. Instituto Imdea Energia; España
dc.description.fil
Fil: Barawi, Mariam. Instituto Imdea Energia; España
dc.description.fil
Fil: Alfonso González, Elena. Instituto Imdea Energia; España
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Fil: Escudero Rodríguez, Carlos. Alba - Synchrotron Light Source.; España
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Fil: Pérez Dieste, Virginia. Alba - Synchrotron Light Source.; España
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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: de la Peña O'Shea, Víctor A.. Instituto Imdea Energia; España
dc.journal.title
Catalysis Today
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0920586120300134?via%3Dihub
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.cattod.2020.01.013
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