Hydrogen production by photoreaction of ethanol over Au/TiO[sub]2[/sub] anatase: the effect of TiO[sub]2[/sub] particle size.

A. M. Nadeem; G. I. N. Waterhouse; J. B Metson; H. Idriss

doi:10.1117/12.861471

24 August 2010 Hydrogen production by photoreaction of ethanol over Au/TiO₂ anatase: the effect of TiO₂ particle size.

A. M. Nadeem, G. I. N. Waterhouse, J. B Metson, H. Idriss

Proceedings Volume 7770, Solar Hydrogen and Nanotechnology V; 777016 (2010) https://doi.org/10.1117/12.861471
Event: SPIE Solar Energy + Technology, 2010, San Diego, California, United States

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.

Citation Download Citation

A. M. Nadeem, G. I. N. Waterhouse, J. B Metson, and H. Idriss "Hydrogen production by photoreaction of ethanol over Au/TiO₂ anatase: the effect of TiO₂ particle size.", Proc. SPIE 7770, Solar Hydrogen and Nanotechnology V, 777016 (24 August 2010); https://doi.org/10.1117/12.861471

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