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Decomposition of water by a CaTiO3 photocatalyst under UV light irradiation |
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| Authors: | Hiroshi MizoguchiKazushige Ueda Masahiro OritaSang-Chul Moon Koichi KajiharaMasahiro Hirano Hideo Hosono |
| Affiliation: | a Hosono Transparent Electro-Active Materials, ERATO, JST, KSP C-1232, 3-2-1 Sakado, Takatsu-ku, Kawasaki 213-0012, Japan b Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan c Research Institute of Innovative Technology for the Earth, Kyoto 619-0292, Japan |
| Abstract: | Platinized CaTiO3 powder (band gap 3.5 eV) had a high photocatalytic activity of decomposing water into H2 and O2 under the irradiation of UV light, especially with photon energies above 3.8 eV. The existence of this photocatalytic activity is further supported on electrochemical grounds in that the photoinduced current spectrum measured between a CaTiO3 single crystal and a Pt electrode without applied voltage in water showed a maximum near 4.1 eV. This result indicates that the direct measurement of the spectrum corresponding to the efficiency of water decomposition is an effective method to survey photocatalytic activities of materials. |
| Keywords: | C. Electrochemical measurements D. Catalytic properties |
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