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Hydrogen Gas Evolution From Water Dispersing Nanoparticles Irradiated With Gamma-Ray

Published online by Cambridge University Press:  10 February 2011

S. Seino ,
R. Fujimoto ,
T. A. Yamamoto ,
M. Katsura ,
S. Okuda ,
K. Okitsu  and
R. Oshima
S. Seino
Affiliation:
Department of Nuclear Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan. [email protected]
R. Fujimoto
Affiliation:
Department of Nuclear Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
T. A. Yamamoto
Affiliation:
Department of Nuclear Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
M. Katsura
Affiliation:
Department of Nuclear Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
S. Okuda
Affiliation:
Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
K. Okitsu
Affiliation:
Department of Materials Science and Engineering, Nagasaki University, 1-14 Bunkyo, Nagasaki 852-8521, Japan
R. Oshima
Affiliation:
Research Institute for Advanced Science and Technology, Osaka Prefectural University, 1-2 Gakuen, Sakai, Osaka 599-8570, Japan
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Abstract

Hydrogen gas evolution from water dispersing nanoparticles under 60Co γ-ray irradiation was investigated under various conditions. Dispersion of TiO2, A12O3, ZnO, ZrO2 and CeO2 nanoparticles with average sizes of 6 nm - 11 µm showed hydrogen yields much higher than that obtained by pure water radiolysis, and the yields seemed to depend on their particle size and shape rather than their chemical species. Hydrogen yield increased with increasing γ-dose but not linearly, which implies the occurrence of a kind of reversing reaction. Some of the nanoparticles supported with Pt, Au and Pd were also examined. The yields were strongly affected by these noble metals, which indicates an important role of the particle surface in the total mechanism of the present hydrogen evolution.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 608: Symposium QQ – Scientific Basis for Nuclear Waste Management XXIII , 1999 , 505
Copyright
Copyright © Materials Research Society 2000

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References

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