| Project/Area Number |
18K18973
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 27:Chemical engineering and related fields
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2018-06-29 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2019: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2018: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
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| Keywords | 層状複水酸化物 / Mg-Al LDH / Pt-Ni LDO / 二酸化炭素の水素化 / 一酸化炭素 / Pt-Ni LDH / Ni-Al LDH / 固体塩基性 |
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| Outline of Final Research Achievements |
A catalyst composed of isolated Pt atoms surrounded by Ni atoms in a Ni-Pt alloy exhibited a relatively high CH4-formation rate while maintaining excellent selectivity for CH4 evolution, when compared to bulk Ni atoms. In this study, we tried to synthesize the Ni-Pt alloy using Mg-Al LDH as a template. 5mol% Pt containing Pt-Ni alloy showed the highest activity for CH4 evolution among Pt-Ni alloys with various Pt/Ni ratios. The Ni-Pt alloy nanoparticles were highly dispersed in the LDH-ralated materials as compared to those synthesized by other methods.
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| Academic Significance and Societal Importance of the Research Achievements |
2種類以上の金属を混ぜ合わせて合成する合金ナノ粒子は単一の金属で形成される金属ナノ粒子に比べて触媒作用に関する研究が進んでいない．本研究では自然界でも産出される層状複水酸化物を母材として用いることによって，均一で高い分散性のPtとNiの合金ナノ粒子を合成することに成功した．近年，CO2を有用な物質に再資源化する方法として注目されているCO2の水素化をテスト反応に用いてPt-Ni合金ナノ粒子の活性を検討したところ，他の方法で合成したPt-Ni合金ナノ粒子に比べて，著しく高い活性を示すことを見出した．すなわち，触媒活性は分散性に依存することが明らかとなり，今後の触媒設計に有用である．
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