2006 Fiscal Year Final Research Report Summary
Control of the structure of metal clusters on nanotubes and their physical properties
| Project/Area Number |
17310059
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nanostructural science
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| Research Institution | Japan Advanced Institute of Science and Technology |
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Principal Investigator |
MITANI Tadaoki Japan Advanced Institute of Science and Technology, School of Materials Science, Professor (50010939)
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| Co-Investigator(Kenkyū-buntansha) |
FUJIWARA Akihiko Japan Advanced Institute of Science and Technology, School of Materials Science, Associate Professor (70272458)
TANAKA Hirobumi Molecular Nanoscale Science Center, Institute of Molecular Science, Assistant Professor (90373191)
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| Project Period (FY) |
2005 – 2006
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| Keywords | Metal Cluster / Cabalist / EXAFS / TEM / XAFS |
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| Research Abstract |
In this research, we successfully made to form Pt clusters on multi-wall nanotubes (MWNT) by a new size control method from single atoms to 5 nm clusters and discussed unique characteristics associated with electrocatalytical activity of Pt clusters. By X-ray measurements; X-ray photoelectron spectroscopy (XPS), in-situ powder X-ray diffractometry (XRD), in-situ or ex-situ XANES and EXAFS, using synchrotron radiation on samples prepared from the reduction of a Pt precursor on thiolated MWNT, clusters around 2nm and the dynamical fluctuations of these crystalline structures of during formation processes were investigated, particularly focusing on a disorder-to-crystalline transformation in. From these results, it was demonstrated the formation processes of Pt clusters on MWNT, which is quite consistent with the simulation of these behaviors obtained by the first principle DFT calculations.
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