Performance comparison of Ni/TiO2 and Au/TiO2 photocatalysts for H2 production in different alcohol-water mixtures

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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	Chen, Wan-Ting
dc.contributor.author	Chan, Andrew
dc.contributor.author	Sun-Waterhouse, Dongxiao
dc.contributor.author	Llorca Piqué, Jordi
dc.contributor.author	Idriss, Hicham
dc.contributor.author	Waterhouse, Geoffrey I.N.
dc.date	2018-11-01
dc.identifier.citation	Chen, W., Chan, A., Sun-Waterhouse, D., Llorca, J., Idriss, H., Waterhouse, G. Performance comparison of Ni/TiO2 and Au/TiO2 photocatalysts for H2 production in different alcohol-water mixtures. "Journal of catalysis", 1 Novembre 2018, vol. 367, p. 27-42.
dc.identifier.citation	0021-9517
dc.identifier.citation	10.1016/j.jcat.2018.08.015
dc.identifier.uri	http://hdl.handle.net/2117/122644
dc.language.iso	eng
dc.relation	https://www.sciencedirect.com/science/article/pii/S0021951718303270
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	Àrees temàtiques de la UPC::Enginyeria química
dc.subject	Hydrogen
dc.subject	Photocatalysis
dc.subject	Hydrogen production Alcohol photoreforming Photocatalysis Ni/TiO2 Au/TiO2
dc.subject	Hidrogen
dc.subject	Fotocatàlisi
dc.title	Performance comparison of Ni/TiO2 and Au/TiO2 photocatalysts for H2 production in different alcohol-water mixtures
dc.type	info:eu-repo/semantics/submittedVersion
dc.type	info:eu-repo/semantics/article
dc.description.abstract	This study systematically compares the performance of 0.5¿wt% Ni/P25 TiO2 and 2¿wt% Au/P25 TiO2 photocatalysts for H2 production in alcohol-water mixtures under UV excitation. HRTEM, XANES and EXAFS confirmed the presence of 5–8¿nm Ni0 and Au0 nanoparticles on the surface of the photocatalysts. H2 production tests were conducted in various alcohol-water systems (0–100¿vol%), using methanol, ethanol, ethylene glycol and glycerol. The Ni/P25 TiO2 and Au/P25 TiO2 photocatalysts demonstrated remarkably similar performance for hydrogen production in all the alcohol-water systems tested. At low alcohol concentrations (15¿vol% or less), H2 production rates followed the order glycerol¿>¿ethylene glycol¿>¿methanol¿>¿ethanol, whilst at higher alcohol concentrations methanol (optimum 40¿vol%) and ethanol (optimum 80–90¿vol%) afforded the highest rates. Rates depended on the polarity and oxidation potential of the alcohol. Further, anatase-rutile heterojunctions in P25 TiO2 were found to greatly enhance H2 production.
dc.description.abstract	Peer Reviewed

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