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Proceedings Paper

Hydrogen production using metal nanoparticle modified silicon thin film photoelectrode
Author(s): Shinji Yae; Ayumi Onaka; Makoto Abe; Naoki Fukumuro; Shunsuke Ogawa; Norimitsu Yoshida; Shuichi Nonomura; Yoshihiro Nakato; Hitoshi Matsuda
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Paper Abstract

Hydrogen production using water splitting by photoelectrochemical solar cells equipped with a TiO2 photoelectrode has been attracting much attention. However, TiO2 encounters serious difficulty in achieving hydrogen evolution. One solution to this difficulty is using a hydrogen-producing semiconductor, such as silicon, and an oxidation reaction other than oxygen evolution, such as oxidation of iodide ions into iodine (triiodide ion). In this study, microcrystalline silicon (μc-Si:H) thin films are used as photoelectrodes in the photodecomposition of HI for low-cost and efficient production of solar hydrogen. An n-μc-3C-SiC:H and an i-μc-Si:H layer are deposited on glassy carbon substrates using the hot-wire cat-CVD method. The μc-Si:H electrodes are modified with platinum nanoparticles through electroless displacement deposition. The platinum nanoparticles improve the electrode's stability and catalytic activity. The electrodes produce hydrogen gas and iodine via photoelectrochemical decomposition of HI with no external bias under simulated solar illumination. We also attempt solar water splitting using a multi-photon system equipped with the μc-Si:H thin film and TiO2 photoelectrodes in series.

Paper Details

Date Published: 11 September 2007
PDF: 9 pages
Proc. SPIE 6650, Solar Hydrogen and Nanotechnology II, 66500E (11 September 2007); doi: 10.1117/12.739442
Show Author Affiliations
Shinji Yae, Univ. of Hyogo (Japan)
Japan Science and Technology Agency (Japan)
Ayumi Onaka, Univ. of Hyogo (Japan)
Makoto Abe, Univ. of Hyogo (Japan)
Naoki Fukumuro, Univ. of Hyogo (Japan)
Shunsuke Ogawa, Gifu Univ. (Japan)
Norimitsu Yoshida, Gifu Univ. (Japan)
Japan Science and Technology Agency (Japan)
Shuichi Nonomura, Gifu Univ. (Japan)
Japan Science and Technology Agency (Japan)
Yoshihiro Nakato, Kwansei Gakuin Univ. (Japan)
Japan Science and Technology Agency (Japan)
Hitoshi Matsuda, Univ. of Hyogo (Japan)

Published in SPIE Proceedings Vol. 6650:
Solar Hydrogen and Nanotechnology II
Jinghua Guo, Editor(s)

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