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Proceedings Paper

Hydrogen production by photoreaction of ethanol over Au/TiO[sub]2[/sub] anatase: the effect of TiO[sub]2[/sub] particle size.
Author(s): A. M. Nadeem; G. I. N. Waterhouse; J. B Metson; H. Idriss
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Paper Abstract

The work presents the photo-catalytic reactions of ethanol over Au particles deposited on TiO2 anatase nano- (≤ 10 nm) and micro- (ca. 0.15 μm) particle catalysts. The Au particles are of uniform and similar dimension (mean particle size = ca. 5 nm and 7 nm on the microand nano-sized TiO2, respectively). XPS Au4f indicated that in both cases Au particles are present in their metallic state with no evidence of charge transfer to (or from) the semiconductor. Liquid slurry photoreaction indicated the production of hydrogen with a rate ≈ 2 L/kgCatal.min on 2 wt. % Au/TiO2 anatase nano-particles under UV photo irradiation of comparable intensity to solar radiation. While the reaction rate per unit mass was lower on the micro-sized Au/TiO2 it simply scaled up to an equivalent rate for the nano-sized Au/TiO2 catalyst when normalised by unit area.

Paper Details

Date Published: 24 August 2010
PDF: 10 pages
Proc. SPIE 7770, Solar Hydrogen and Nanotechnology V, 777016 (24 August 2010); doi: 10.1117/12.861471
Show Author Affiliations
A. M. Nadeem, Univ. of Auckland (New Zealand)
Univ. of Aberdeen and Robert Gordon Univ. (United Kingdom)
G. I. N. Waterhouse, Univ. of Auckland (New Zealand)
J. B Metson, Univ. of Auckland (New Zealand)
H. Idriss, Univ. of Aberdeen and Robert Gordon Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 7770:
Solar Hydrogen and Nanotechnology V
Hicham Idriss; Heli Wang, Editor(s)

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