Plasmonic versus catalytic effect of gold nanoparticles on mesoporous TiO2 electrodes for water splitting
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Other documents of the author: Haro, Marta; Abargues, Rafael; Herraiz Cardona, Isaac; Martínez-Pastor, Juan P.; Gimenez, Sixto
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Show full item recordcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/2507
comunitat-uji-handle3:10234/6973
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http://dx.doi.org/10.1016/j.electacta.2014.07.146 |
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Title
Plasmonic versus catalytic effect of gold nanoparticles on mesoporous TiO2 electrodes for water splittingAuthor (s)
Date
2014-10Publisher
ElsevierISSN
0013-4686Type
info:eu-repo/semantics/articlePublisher version
http://www.sciencedirect.com/science/article/pii/S0013468614015837Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
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. [-]
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Electrochimica Acta, 2014, vol. 144Rights
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