Enhancement of Solar Water-Splitting Activity for Hydrogen Production
| Project/Area Number |
17H03126
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Inorganic industrial materials
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| Research Institution | University of Yamanashi |
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Principal Investigator |
Irie Hiroshi 山梨大学, 大学院総合研究部, 教授 (70334349)
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| Project Period (FY) |
2017-04-01 – 2022-03-31
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| Project Status |
Completed (Fiscal Year 2021)
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| Budget Amount *help |
¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
Fiscal Year 2020: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2019: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2018: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2017: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
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| Keywords | 光触媒 / 水素 / 水分解 / 赤色光 / 太陽光 / 複合材料・物性 / ナノ材料 / 再生可能エネルギー |
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| Outline of Final Research Achievements |
We have investigated water-splitting photocatalysts under entire range of visible light on the basis of a material design and a mechanistic approach. Then, we discovered all-solid-state hetero-junction photocatalysts, by connecting zinc rhodium oxide (ZnRh2O4) and bismuth vanadium oxide (Bi4V2O11) as hydrogen (H2)- and oxygen (O2)-evolution photocatalysts, respectively, with silver (Ag) or gold (Au). These photocatalysts achieved the overall pure-water splitting under red light, following a conventional well-known Z-scheme mechanism, but the present photocatalysts did not require any chemicals as a redox mediator. In addition, we tried to selectively deposit a H2-evolution cocatalyt onto ZnRh2O4 and a O2-evolution cocatalyt onto Bi4V2O11 towards the enhancement of water splitting activity.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究を通じて、太陽光というクリーンな自然エネルギーを用いて、試薬など必要のない水を完全分解し、クリーンエネルギーである水素を、実用化を視野に入れた高い効率で獲得きるようになった。また、この成果は二酸化炭素の固定化によるエネルギー獲得にも展開できることが示唆され、これらは環境・エネルギー問題の解決の一助となることができるであろう。
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Report
(5 results)
Research Products
(33 results)
