| Budget Amount *help |
¥22,490,000 (Direct Cost: ¥17,300,000、Indirect Cost: ¥5,190,000)
Fiscal Year 2017: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2016: ¥7,800,000 (Direct Cost: ¥6,000,000、Indirect Cost: ¥1,800,000)
Fiscal Year 2015: ¥11,570,000 (Direct Cost: ¥8,900,000、Indirect Cost: ¥2,670,000)
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| Outline of Final Research Achievements |
Size-selected metal nanocluster catalysts supported on strontium titanate were prepared by using soft-landing method along with a high-flux nanocluster ion source. Catalytic activity for hydrogen evolution reaction (HER) of single-size palladium nanocluster catalysts was investigated under atmospheric conditions in aqueous solution; palladium 30-mer exhibit the highest activity per unit atom. Taking into account the electron affinities of Pt NCs measured by photoelectron spectroscopy, the reaction mechanism of HER is deduced: the size-specific HER activity originates from the matching of energy levels of lowest unoccupied molecular orbitals of Pt NCs with the band structure of strontium titanate surfaces. In addition, milligram-scale synthesis for metal-encapsulating silicon cage nanolcusters were established based on the high-flux nanolcuster source.
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