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Sustainable H2 gas production by photocatalysis

Bahruji, Hasliza, Bowker, Michael, Davies, Philip Rosser, Al-Mazroai, Layla Saeed, Dickinson, Amanda, Greaves, Jane, James, David, Millard, Lucy and Pedrono, Fabien 2010. Sustainable H2 gas production by photocatalysis. Journal of Photochemistry and Photobiology A: Chemistry 216 (2-3) , pp. 115-118. 10.1016/j.jphotochem.2010.06.022

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The photocatalytic, ambient temperature, reforming of oxy-hydrocarbons, used to generate hydrogen gas, has been studied in some detail over Pd-titania systems and a general mechanism is developed. In the case of water–methanol mixtures, methanol adsorption on the metal surface results in hydrogen gas evolution and the formation of adsorbed CO. The latter is subsequently oxidised by an oxygen species (O−) generated in the semiconductor by UV light. Desorption of the resulting CO2 enables another methanol molecule to adsorb, restarting the cycle. Water is reduced at the titania hole replacing the lost anion and generating further hydrogen. We will discuss the evidence for this mechanism and extend it to consider the photocatalysis of higher alcohols including ethanol, butanol and glycerol.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Cardiff Catalysis Institute (CCI)
Subjects: Q Science > QD Chemistry
Uncontrolled Keywords: Alcohol reforming, Hydrogen production, Methanol, Photocatalysis, Titania-Pd catalysts, Water splitting
Publisher: Elsevier
ISSN: 1010-6030
Last Modified: 05 Nov 2020 02:29

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