| Project/Area Number |
19K15671
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 36020:Energy-related chemistry
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
Li Yamei 東京工業大学, 地球生命研究所, 特任准教授 (10745128)
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| Project Period (FY) |
2019-04-01 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | Asteroid Ryugu / Carbonaceous chondrite / Amino acid / Electrochemistry / Mineral catalysis / Aqueous alteration / Amino acid decomposition / Solar System evolution / Astrobiology / Geo-electrochemistry / Amino acids / Alteration / Carbonaceous chondrites / CO2 fixation / electroreduction of CO2 / bio-inspired catalysis / Carbon dioxide reduction / Bio-inspired catalysis / Electrocatalysis / Energy conversion / Thiamin pyrophosphate / Carbon Dioxide Reduction / Green Energy / Energy Conversion |
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| Outline of Research at the Start |
For CO2 utilization, a new reaction system is proposed by introducing the functionalization reagents into the electrochemical cell during CO2 reduction. This multicomponent electrocatalytic system is expected to open a new horizon for the synthesis of C-N bond-bearing compounds. Regulation of proton-coupled electron transfer will be utilized as the main strategy for controlling the reaction selectivity. Electrochemical spectroscopies will be performed for elucidating the molecular mechanism, which serves as a guide for catalyst screening and reaction condition optimization.
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| Outline of Final Research Achievements |
Organic evolution on carbonaceous chondrites gives important clues on the evolutionary history occured on the early Solar System bodies. We have clarified the following: 1)the degradation effect of aqueous alteration on proteinogenic amino acids. The alfa-amino acids tend to decompose electrochemically via deamination and decarboxylation pathways; 2)the origin of heterogenity of amino acid distribution on various types of carbonaceous chondrite parent bodies. We proposed that the difference in the core and mantle within a water/rock differentiated parent planetesimal is the origin for such heterogenity.
These results have important implications on meteorites' contribution to life's origin and guiding the search for life's building blocks in space. The results were published on two peer-reviewed papers (Nat. Comm., 2022 and Sci. Adv., 2023) and reported in several domestic and international conferences.
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| Academic Significance and Societal Importance of the Research Achievements |
Origin of life's building blocks is key to understand the origin of life (OOL). This research proposed a new model based on the non-equilibrium thermodynamics, which brings new insights into the organic chemical evolution on the Solar System small bodies and meteorites' contribution to OOL.
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