書誌事項
- タイトル別名
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- Photolysis of Water over Pt/TiO<sub>2</sub> Catalysts
- Pt TiO2フンマツ ショクバイ ニ ヨル ミズ ノ ヒカリ ブンカイ
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Quantum efficiency was measured for the photolysiA of gaseous water over NaOH-coated Pt; TiO2 catalysts and it was maximized by improving the method of platinization and selecting the crystal structure and the manufacturer of TiO2. The preparation methods of Pt/TiO2 catalysts were photo-electrochemical deposition, NaBH4 reduction, HCOONa reduction, and impregnation followed, by hydrogen reduction. It was found that the catalysts were activated by illuminating them in a wet state and then in a dry state in the presence of gaseous water. The stoichiometry of the products (H2/O2=2) was well established after the activation of the catalysts.<BR>The results show that the photocatalytic activity is little affected by the preparation method, but strongly depends on the crystal structure and the source of TiO2. Anatase is more active than rutile irrespective of its source. The activity of anatase seems to be affected by the impurity, the degree of crystal growth, and the grain size, while that of rutile seems to depend on the grain size alone. The maximum quantum efficiency, 17%, was attained when MCB anatase was used. It was also found that the rate of the thermal back reaction (H2+1/2O2→H2O) on Pt/TiO2 is proportional to the pressure of hydrogen and the net rate of water photolysis is independent of the pressures of the products within the pressure range observed.
収録刊行物
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- 日本化学会誌(化学と工業化学)
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日本化学会誌(化学と工業化学) 1984 (2), 258-263, 1984
公益社団法人 日本化学会
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詳細情報 詳細情報について
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- CRID
- 1390282679365974016
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- NII論文ID
- 130004157764
- 40002843576
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- NII書誌ID
- AN00186595
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- COI
- 1:CAS:528:DyaL2cXhsVygtbY%3D
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- ISSN
- 21850925
- 03694577
- http://id.crossref.org/issn/03694577
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- NDL書誌ID
- 2972427
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可