Hydrogen production using metal nanoparticle modified silicon thin film photoelectrode

Shinji Yae; Ayumi Onaka; Makoto Abe; Naoki Fukumuro; Shunsuke Ogawa; Norimitsu Yoshida; Shuichi Nonomura; Yoshihiro Nakato; Hitoshi Matsuda

doi:10.1117/12.739442

11 September 2007 Hydrogen production using metal nanoparticle modified silicon thin film photoelectrode

Shinji Yae, Ayumi Onaka, Makoto Abe, Naoki Fukumuro, Shunsuke Ogawa, Norimitsu Yoshida, Shuichi Nonomura, Yoshihiro Nakato, Hitoshi Matsuda

Author Affiliations +

Proceedings Volume 6650, Solar Hydrogen and Nanotechnology II; 66500E (2007) https://doi.org/10.1117/12.739442
Event: Solar Energy + Applications, 2007, San Diego, California, United States

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.

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Shinji Yae, Ayumi Onaka, Makoto Abe, Naoki Fukumuro, Shunsuke Ogawa, Norimitsu Yoshida, Shuichi Nonomura, Yoshihiro Nakato, and Hitoshi Matsuda "Hydrogen production using metal nanoparticle modified silicon thin film photoelectrode", Proc. SPIE 6650, Solar Hydrogen and Nanotechnology II, 66500E (11 September 2007); https://doi.org/10.1117/12.739442

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