| Budget Amount *help |
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2011: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2010: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2009: ¥11,830,000 (Direct Cost: ¥9,100,000、Indirect Cost: ¥2,730,000)
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| Research Abstract |
The high pressure absorption of H2 by single-walled carbon nanohorns including Pd-Ni alloy nanoparticles prepared by a gas-injected arc-in-water method was measured by a magnetic suspension balance. It was found that the amount of H2 absorbed by Pd-Ni alloy particles in Pd-Ni/SWCNHs was significantly larger than that absorbed by ordinal Pd-Ni alloys and pure-carbon SWCNHs of the equivalent mass. It can be speculated that this large amount of H2 absorbed by Pd-Ni/SWCNHs is due to spill-over effect of H2 by which H2 is catalytically dissociated at the alloy surfaces, and the dissociative H would diffuse through the carbonaceous part of SWNHs to reach the Pd-Ni nanoparticles dispersing therein. Some portion of dissociative H would remain in carbonaceous parts. A mild oxidation treatment was conducted on Pd-Ni/SWCHs in O2 at 350 oC to generate micropore channels in the carbonaceous parts of Pd-Ni/SWCHs, resulting that the H2 absorption rate was drastically enhanced.
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