| Project/Area Number |
17H06608
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Energy-related chemistry
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| Research Institution | The University of Tokyo |
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Principal Investigator |
Matsuo Hiroki 東京大学, 大学院新領域創成科学研究科, 特任助教 (10792517)
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| Project Period (FY) |
2017-08-25 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | 光電極 / 水分解 / スズ酸化物 / 強誘電体 / 水素製造 / パルスレーザー堆積法 / 格子欠陥 / 薄膜 / 光触媒 / 触媒・化学プロセス / 再生可能エネルギー / 光物性 / 半導体物性 / 表面・界面物性 |
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| Outline of Final Research Achievements |
Development of hydrogen production technologies utilizing renewable energies has been demanded to realize CO2-free hydrogen society. In this research, thin-film water splitting photoelectrodes which can decompose water to hydrogen and oxygen under irradiation of sunlight was developed. Thin-film photoelectrodes with visible-light-active semiconducting oxides of Sn2TiO4 and SnNb2O6 containing Sn2+ ion were prepared by a pulsed-laser deposition method. Relation between water splitting activity of the photoelectrodes and lattice defects in the semiconducting oxides were clarified. In addition, an influence of introducing a ferroelectric thin layer in the photoelectrodes on the water splitting performance was investigated.
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| Academic Significance and Societal Importance of the Research Achievements |
太陽光エネルギーを利用した水素製造方法の一つとして，可視光を吸収する半導体光電極による水分解が挙げられる．可視光領域に吸収を持つSn2TiO4およびSnNb2O6は粉末での光電極への研究がなされてきたが，高特性化が期待できる薄膜型光電極の研究は，その薄膜合成の難しさからこれまでに報告されていない．本研究ではこれらの材料の薄膜光電極の開発に成功し，水分解活性が発現することを示した．格子欠陥と性能との関連や強誘電体層の導入効果を検証し，今後の性能向上に向けた指針を示した．
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