| 研究課題/領域番号 |
22K04852
|
|---|
| 研究種目 |
基盤研究(C)
|
| 配分区分 | 基金 |
|---|
| 応募区分 | 一般 |
|---|
| 審査区分 |
小区分28010:ナノ構造化学関連
|
|---|
| 研究機関 | 北海道大学 |
|---|
研究代表者 |
グエン タンマイ 北海道大学, 工学研究院, 助教 (00730649)
|
|---|
| 研究期間 (年度) |
2022-04-01 – 2025-03-31
|
| 研究課題ステータス |
交付 (2023年度)
|
| 配分額 *注記 |
4,160千円 (直接経費: 3,200千円、間接経費: 960千円)
2024年度: 1,300千円 (直接経費: 1,000千円、間接経費: 300千円)
2023年度: 1,300千円 (直接経費: 1,000千円、間接経費: 300千円)
2022年度: 1,560千円 (直接経費: 1,200千円、間接経費: 360千円)
|
|---|
| キーワード | 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 |
|---|
| 研究開始時の研究の概要 |
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.
|
| 研究実績の概要 |
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.
|
| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
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.
|
| 今後の研究の推進方策 |
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.
|
