Disordered-ordered structure transition in co-sputtered solid solution nanoparticles and its impact on catalytic properties
Project/Area Number |
22K04852
|
Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 28010:Nanometer-scale chemistry-related
|
Research Institution | Hokkaido University |
Principal Investigator |
グエン タンマイ 北海道大学, 工学研究院, 助教 (00730649)
|
Project Period (FY) |
2022-04-01 – 2025-03-31
|
Project Status |
Granted (Fiscal Year 2022)
|
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)
|
Keywords | solid solution alloy / intermetallics / nanoparticles / AgPt / structure transition / ORR / Pt alloy / co-sputter deposition |
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 |
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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Current Status of Research Progress |
Current Status of Research Progress
3: Progress in research has been slightly delayed.
Reason
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.
|
Strategy for Future Research Activity |
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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Report
(1 results)
Research Products
(9 results)