| Project/Area Number |
22K04852
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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 28010:Nanometer-scale chemistry-related
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| Research Institution | Hokkaido University |
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Principal Investigator |
グエン タンマイ 北海道大学, 工学研究院, 助教 (00730649)
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| Project Period (FY) |
2022-04-01 – 2025-03-31
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| Project Status |
Granted (Fiscal Year 2023)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2024: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | solid solution alloy / bimetallic oxide / oxygen reduction / oxygen evolution / in-situ heating / ordered structure / Heating STEM / intermetallics / nanoparticles / AgPt / structure transition / ORR / Pt alloy / co-sputter deposition |
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| Outline of Research at the Start |
Disordered to ordered structure changes in alloy nanoparticles substantially influence catalytic performance. This study sheds light on such fine structure transition depending on temperature, particle size, metal composition, and surface chemical state, and how it impacts the catalytic activity.
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| Outline of Annual Research Achievements |
Slightly Pt rich-AgPt solid solution alloy nanoparticles were produced via co-sputter deposition. The preparation for study of temperature dependent structure changes via in-situ scanning transmission electron microscope (STEM) heating has been carried out. The structure transformation of the sputtered nanoparticles from solid solution alloy to L11 ordered structure was successfully observed with in-situ STEM, depending on the temperature. In addition, alloy nanoparticles of different compositions and sizes were prepared for study the structure changes under in-situ heating to different temperatures. Besides, bimetallic alloy oxide nanoparticles and spinel oxides of Fe-Co-Ni metal group were synthesized with enhanced catalytic properties for use in rechargeable metal air batteries.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The research progressed as planed and another research branch was also developed regarding synthesis of bi-, tri-metallic oxides as electrocatalysts for the oxygen redox reactions.
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| Strategy for Future Research Activity |
The temperature for ordered structure formation for different compositions of the solid solution alloy nanoparticles will be examined with in situ heating STEM and the underlying mechanism will be investigated.
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