研究課題/領域番号 |
22K04852
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研究種目 |
基盤研究(C)
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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
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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)
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研究期間 (年度) |
2022-04-01 – 2025-03-31
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研究課題ステータス |
交付 (2022年度)
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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)
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キーワード | solid solution alloy / 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.
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研究実績の概要 |
Bimetallic AgPt with various compositions were prepared by cosputter deposition. Substrates including liquid polyethylene glycol, solid substrate, and transmission electron microscope (TEM) grids were used. The sputter conditions were studied to obtain equimolar AgPt alloy. The structure and composition analysis confirmed the formation of solid solution alloy. Besides, trimetal alloy nanoparticles (AgPtCu) were synthesized. The catalytic performance in oxygen reduction reaction (ORR) were evaluated for tri- and bi-metal alloy nanoparticles and sputtered Pt nanoparticles. AgPt was found to outperform others. The improvement was thought to arise from the stable structure of AgPt and the formation of AgPt alloy.
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現在までの達成度 (区分) |
現在までの達成度 (区分)
3: やや遅れている
理由
The PI took maternity and childcare leaves in 2022 (April 2022, partially in August-September), and from October 2022 to March 2023. Therefore the research progress in FY 2022 was somehow delayed compared with the original plan.
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今後の研究の推進方策 |
For FY 2023: the disordered-ordered structure transition of AgPt will be examined for different particle size and under different gaseous environment. Moreover, composition dependence of disordered-ordered structure transition will be studied this year.
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