2022 Fiscal Year Final Research Report
Formation of interfacial stress-induced unprecedented ordered alloy nanoparticles and exploration of their structure-specific properties
| Project/Area Number |
19K22231
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 36:Inorganic materials chemistry, energy-related chemistry, and related fields
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2019-06-28 – 2023-03-31
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| Keywords | ナノ材料 / パラジウム / 鉄 / 第三元素 / 規則化合金相 / Z3構造 / 磁気特性 |
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| Outline of Final Research Achievements |
The purpose of this study was to clarify the formation mechanism and the structure-specific properties of a novel FePd3 ordered alloy phase based on the P4/mmm space group and propose a design guideline for an unprecedented ordered alloy nanomaterials. We succeeded in synthesizing the Z3-Fe(Pd,In)3 phase and the Pt-Ir-Fe alloy phase possessing the intermediate structure between the isotropic L12 and the anisotropic L10 structure. It was demonstrated that the novel crystal phases obtained by our method have interesting crystal structures and physical properties that are not found in the nanoparticles obtained by the one-step synthesis. In particular, the anisotropic functions based on the anisotropic crystal structures of inorganic materials are extremely interesting from the viewpoint of creating high-performance and high-efficiency catalytic and magnetic materials.
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| Free Research Field |
無機化学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で合成されたZ3-Fe(Pd,In)3ナノ粒子は、等方性L12構造にはない高い酸素還元能および磁気特性を有していることが明らかとなっている。特に、異方性規則化合金ナノ粒子は、(111)面の異方性二次元歪みにより、非常に高い酸素還元触媒特性を示す可能性が高く、固体高分子質型燃料電池のカソード触媒への展開が期待される。
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