FABRICATION OF ULTRAFINE NANOPOROUS COPPER STABILIZED BY NOBLE METALS WITH LOW SURFACE DIFFUSIVITY
| Project/Area Number |
24760567
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Structural/Functional materials
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| Research Institution | Tohoku University |
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Principal Investigator |
DAN Zhenhua 東北大学, 金属材料研究所, 助教 (60624129)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2013: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | ナノポーラス / 微量貴金属添加 / 触媒材料 / 表面拡散 / 電池材料 |
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| Research Abstract |
Ultrafine nanoporous copper (NPC) was fabricated from Ti-Cu-M (M:Ag, Au, Ni, Pd, Pt) amorphous precursor alloys by dealloying in HF solutions. NPCs stabilized by M had a pore size less than 10 nm, which is similar with that of NP Au, NP Pt. In comparison to NPCs fabricated from M-free Ti-Cu amorphous precursors, the pore size decreased about 1-2 orders. The introduction of M adatoms resulted in the suppression of the fast long-distance free diffusion of Cu adatoms during dealloying. The drastic decrease in the surface diffusivity caused by the slow diffusion of M adatoms indicated that the diffusion at the interface of alloy/solution controlled the formation of NPCs. The application of the present ultrafine NPCs has a potential to replace the conventional Pt nanoparticle catalysts, which can save the cost and on the other hand, the decrease of the consuming of rare Pt resources will help our society.
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Report
(3 results)
Research Products
(30 results)
