| Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2022: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2021: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2020: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2019: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
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| Outline of Final Research Achievements |
Various alloy nanoparticles and composite metal oxide supported catalysts composed of non-noble metals were prepared and their three-way catalytic activities were investigated. The effects of composition, oxidation state and electronic interactions on the NO reduction activity were also discussed. The Fe-Ni alloy nanoparticles formed on the Al2O3 surface showed excellent NO reduction activity in the three-way catalytic reaction, suggesting that alloying with Ni improved the stability of Fe in the lower oxidation state, thereby enhancing the NO reduction activity. In addition, pseudo-spinel type (NiCu)Al2O4 was formed on the catalyst surface of Ni-Cu/Al2O3 after thermal aging at high temperature. It was found that the tetrahedrally coordinated Cu with higher electron density due to electron donation from octahedrally coordinated Ni played a key role in enhancing the NO reduction activity.
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