2023 Fiscal Year Research-status Report
Disordered-ordered structure transition in co-sputtered solid solution nanoparticles and its impact on catalytic properties
| Project/Area Number |
22K04852
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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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| Keywords | solid solution alloy / bimetallic oxide / oxygen reduction / oxygen evolution / in-situ heating / ordered structure / Heating STEM |
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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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| Causes of Carryover |
A metal target for experiment was not purchased as the research was revised. The left amount of the budget for FY 2023 will be transferred to the next year for the research. MEMS-chips for heating under different gaseous environment will be bought for research.
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