| Project/Area Number |
19K21135
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| Project/Area Number (Other) |
18H05989 (2018)
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Multi-year Fund (2019)
Single-year Grants (2018) |
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| Review Section |
0502:Inorganic/coordination chemistry, analytical chemistry, inorganic materials chemistry, energy-related chemistry, and related fields
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| Research Institution | Niigata University |
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Principal Investigator |
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| Project Period (FY) |
2018-08-24 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | Carbon dioxide reduction / Iron non heme complexes / Homogeneous catalysis / Heterogeneous Catalysis / Nitrogen doped graphene / iron catalysts / CO2 reduction / photosynthesis / Electrocatalysis / Photocatalysis / iron complexes / nonporphyrin ligands / bifunctional / catalysts / carbon dioxide / electroreduction / water oxidation / aqueous nonaqueous / Fuels |
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| Outline of Research at the Start |
1. designing iron non-porphyrin complexes with efficient CO2 to CO reduction ability.
2. Investigation the activity of complexes in homogeneous and heterogeneous catalysis.
3. Modification of complexes on the electrode surface for electro and photocatalytic CO2 to CO conversion.
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| Outline of Final Research Achievements |
The current fossil fuels are unsustainable and cause global warming. So, discovering alternative fuels is indispensable. CH3OH is currently proposed as one of the best new fuels. A key factor for efficient CH3OH production is developing efficient catalysts for CO2-to-CO conversion. Here we developed several cheap iron non-porphyrin complexes, an Fe(bpb) that showed high activity for CO2 reduction with 93% CO faradaic efficiency at a moderate overpotential η = 0.41 V in homogeneous CO2-saturated DMF solutions. Moreover, these catalysts were successfully immobilized on a nitrogen-doped graphene (NG) electrode to achieve efficient and selective CO2-to-CO conversion in neutral aqueous NaHCO3 solutions (pH =7.3), generating 6 mA/cm2 current density with very high TOF values of 1120 s－1 at η= 0.47 V. These values are among the highest reported values achieved by molecular catalysts in aqueous solutions.
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| Academic Significance and Societal Importance of the Research Achievements |
This work is expected to develop the academic and social society in terms of developing systems for the production of renewable fuel based on storage of solar energy in the form of renewable fuels and is expected to reduce the carbon dioxide atmospheric level to reduce its global warming effect.
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