Effect of TiO 2 nanoshape on the photoproduction of hydrogen from water-ethanol mixtures over Au 3 Cu/TiO 2 prepared with preformed Au-Cu alloy nanoparticles

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dc.contributor	Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques
dc.contributor	Universitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.contributor	Universitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia
dc.contributor.author	Martínez, Lester
dc.contributor.author	Soler Turu, Lluís
dc.contributor.author	Angurell Purroy, Inmaculada
dc.contributor.author	Llorca Piqué, Jordi
dc.date	2019-07-05
dc.identifier.citation	Martínez, L. [et al.]. Effect of TiO 2 nanoshape on the photoproduction of hydrogen from water-ethanol mixtures over Au 3 Cu/TiO 2 prepared with preformed Au-Cu alloy nanoparticles. "Applied catalysis B. Environmental", 5 Juliol 2019, vol. 248, núm. July, p. 504-514.
dc.identifier.citation	0926-3373
dc.identifier.citation	10.1016/j.apcatb.2019.02.053
dc.identifier.uri	http://hdl.handle.net/2117/133435
dc.language.iso	eng
dc.relation	https://www.sciencedirect.com/science/article/pii/S0926337319301614
dc.rights	Attribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights	info:eu-repo/semantics/openAccess
dc.rights	http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject	Àrees temàtiques de la UPC::Energies
dc.subject	Àrees temàtiques de la UPC::Enginyeria dels materials
dc.subject	Alloys
dc.subject	Copper alloys
dc.subject	Nanotechnology
dc.subject	Photocatalysis
dc.subject	Hydrogen
dc.subject	Photocatalysis
dc.subject	Titanium dioxide
dc.subject	Nanoshapes
dc.subject	Au-Cu nanoparticles
dc.subject	Hydrogen
dc.subject	Aliatges
dc.subject	Coure--Aliatges
dc.subject	Nanotecnologia
dc.subject	Fotocatàlisi
dc.subject	Hidrogen
dc.title	Effect of TiO 2 nanoshape on the photoproduction of hydrogen from water-ethanol mixtures over Au 3 Cu/TiO 2 prepared with preformed Au-Cu alloy nanoparticles
dc.type	info:eu-repo/semantics/submittedVersion
dc.type	info:eu-repo/semantics/article
dc.description.abstract	A series of TiO2 nanoshapes (microurchins, nanobelts, nanowires, microrods and nanotubes) were prepared and decorated with preformed nanoparticles of Au-Cu alloy (Au:Cu¿=¿3:1 molar, 1¿wt.% metal content). The resulting photocatalysts were tested for the photogeneration of hydrogen using water-ethanol gaseous mixtures (H2O:EtOH¿=¿1:9 molar basis) under dynamic conditions (26,000 h-1) and compared with a conventional sample prepared using P25. The use of preformed nanoparticles of Au-Cu alloy with the same geometric and electronic characteristics ensured a proper assessment of the influence of the different TiO2 supports on the photoproduction of hydrogen by providing a similar number and quality of metal-support contact points. The yield of hydrogen produced on a weight basis over the Au3Cu/TiO2 samples followed the trend microrods ~P25¿>¿>nanotubes¿>¿nanowires¿>¿nanobelts¿>¿microurchins. A stable hydrogen photogeneration rate of ca. 270¿µmol H2¿g-1¿min-1 was obtained over titania microrods decorated with Au3Cu whereas the photogeneration of hydrogen over P25 decorated with Au3Cu decreased progressively over time on stream.

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