2022 Fiscal Year Final Research Report
Understanding and development of highly efficient water splitting catalysts with core-shell structures for solar-hydrogen production
| Project/Area Number |
20K05684
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 36020:Energy-related chemistry
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| Research Institution | Niigata University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | Green hydrogen / water oxidation / electrocatalysts |
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| Outline of Final Research Achievements |
We developed a ternary FeNiWOx film on a nickel foam (NF), attaining the lowest overpotentials of η10 = 167 mV and at least 100 h stability in water oxidation, which compare advantageously with only a few state-of-the-art OER anodes with excellent η10 < 200 mV.We also developed a NiSx/C3N4 catalyst, demonstrating electrocatalytic water splitting at the lowest overall overpotential of 72 mV using the NiSx/C3N4 anode. We developed a platinum (Pt(w-MeIm)) film, demonstrated a more efficient and stable HER performance.Also, A NiOx film prepared from the NiSO4 precursor showed efficient water oxidation properties. Finally, a photovoltaic device of double-junction GaAs/GaAs was customized to match up with the electrolyzer with a FeNiWOx/nickel foam (NF) anode and a Pt/NF cathode. Efficient and stable (one-month) solar water splitting with a high solar-to-hydrogen efficiency (STH) of 13.9% was demonstrated under 1 sun irradiation.
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| Free Research Field |
Green hydrogen production
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| Academic Significance and Societal Importance of the Research Achievements |
Highly efficient and stable water oxidation catalysts with world wide water oxidation performances were developed that leaded to developing highly efficient carbon-free hydrogen production system using renewable energy, aiming at realizing a low-carbon society that does not depend on fossil fuels.
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