| Budget Amount *help |
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2023: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2022: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2021: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2020: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2019: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Outline of Final Research Achievements |
Two types of platinum-tungstate structures were obtained by air-calcining Keggin-type diplatinum(II)-coordinated polyoxotungstates, Cs3[α-PW11O39{cis-Pt(NH3)2}2]・8H2O (Cs-P-Pt) and Cs4[α-SiW11O39{cis-Pt(NH3)2}2]・11H2O (Cs-Si-Pt), at temperatures ranging from 700 to 900°C for 5 hours. Calcination of Cs-P-Pt resulted in a solid containing platinum nanoparticles and Cs3PW12O40, while calcination of Cs-Si-Pt produced a solid containing platinum nanoparticles and Cs4W11O35. The platinum nanoparticles in the solid obtained from calcining Cs-P-Pt exhibited an average particle size on the nanometer scale, demonstrating a significant platinum aggregation inhibitory effect. Additionally, the solids obtained through calcination showed high photocatalytic activity for hydrogen production from aqueous triethanolamine solution under visible light irradiation and were confirmed to be reusable.
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