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Photocatalytic Hydrogen Production from Gas-phase Methanol and Water with Nanocrystalline TiO2 Thin Films in High Vacuum

Published online by Cambridge University Press:  01 February 2011

Kei Noda ,
Masashi Hattori ,
Kouichi Amari ,
Kei Kobayashi ,
Toshihisa Horiuchi  and
Kazumi Matsushige
Kei Noda
Affiliation:
[email protected], Kyoto University, Electronic Science & Engineering, Katsura, Nishikyo, Kyoto, 615-8510, Japan, 81753832307, 81753832308
Masashi Hattori
Affiliation:
[email protected], Kyoto University, Electronic Science & Engineering, Katsura, Nishikyo, Kyoto, 615-8510, Japan
Kouichi Amari
Affiliation:
[email protected], Kyoto University, Electronic Science & Engineering, Katsura, Nishikyo, Kyoto, 615-8510, Japan
Kei Kobayashi
Affiliation:
[email protected], Kyoto University, Innovative Collaboration Center(ICC), Katsura, Nishikyo, Kyoto, 615-8520, Japan
Toshihisa Horiuchi
Affiliation:
[email protected], Kyoto University, Innovative Collaboration Center(ICC), Katsura, Nishikyo, Kyoto, 615-8520, Japan
Kazumi Matsushige
Affiliation:
[email protected], Advanced Software Technology and Mechanics Research Institute (ASTEM), Shimogyo, Kyoto, 600-8813, Japan
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Abstract

Photocatalytic hydrogen production with gas-phase reactions in high vacuum was examined for nanocrystalline anatase-type titanium dioxide (TiO2) thin films. The hydrogen generation process on platinized TiO2 specimens was investigated using a quadrupole mass spectrometer at a real-time scale under various partial pressures of gaseous methanol and water. As a result, hydrogen generation was successfully detected under ultraviolet ray (UV) illumination even in high vacuum (∼ 10−7 Torr). And the amount of produced H2 largely depends on the temperature of TiO2 samples, probably due to different surface states of TiO2. This study suggests the possibility of new high-speed H2 production system with gas-phase photocatalytic reactions.

Keywords

photochemicalmass spectroscopysurface reaction
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1056: Symposium HH – Nanophase and Nanocomposite Materials V , 2007 , 1056-HH11-56
Copyright
Copyright © Materials Research Society 2008

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References

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