Plasmonic versus catalytic effect of gold nanoparticles on mesoporous TiO2 electrodes for water splitting
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Otros documentos de la autoría: Haro, Marta; Abargues, Rafael; Herraiz Cardona, Isaac; Martínez-Pastor, Juan P.; Gimenez, Sixto
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http://dx.doi.org/10.1016/j.electacta.2014.07.146 |
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Título
Plasmonic versus catalytic effect of gold nanoparticles on mesoporous TiO2 electrodes for water splittingAutoría
Fecha de publicación
2014-10Editor
ElsevierISSN
0013-4686Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://www.sciencedirect.com/science/article/pii/S0013468614015837Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Solar water splitting with metal oxide semiconductors constitutes a promising approach to the conversion of solar energy into chemical energy stored in the atomic bonds of hydrogen molecules. In the present study, we ... [+]
Solar water splitting with metal oxide semiconductors constitutes a promising approach to the conversion of solar energy into chemical energy stored in the atomic bonds of hydrogen molecules. In the present study, we evaluate the effect of the presence of Au nanoparticles on the photoelectrochemical behaviour of mesoporous TiO2 to photo-oxidize water. We observe that the presence of Au nanoparticles leads to enhanced photocurrents for water oxidation and we explore the origin of this enhancement by optical and electrochemical characterization techniques. Our results indicate that although the Au nanoparticles are responsible for a localized surface plasmonic resonance effect, which significantly improves the optical density of the electrodes, the main contribution of these nanoparticles to the photocurrent has a catalytic origin as evidenced by the faster charge transfer kinetics. [-]
Publicado en
Electrochimica Acta, 2014, vol. 144Derechos de acceso
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