2022 Fiscal Year Final Research Report
Control of three-dimensional structure of nanoparticles by combustion synthesis and its application to supported metal catalysts
| Project/Area Number |
20K14665
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 19020:Thermal engineering-related
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 燃焼合成 / ナノ粒子 / 構造制御 / 担持金属触媒 |
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| Outline of Final Research Achievements |
In this study, we focused on combustion synthesis as a method for controlling the particle structure of supported metal catalysts, and performed nanoparticle synthesis under various conditions using Pt/CeO2 as a model system. The precursor solution was atomized by ultrasonic vibration and fed into a diffusion burner flame (flame spray pyrolysis), and the effects of flame temperature and precursor concentration on the structure of Pt/CeO2 nanoparticles were investigated. The results showed that the synthesized particles consisted of spherical ceria particles of about 100 nm in diameter and fine ceria particles of 10 nm or less, and that the formation of fine particles was more dominant at higher temperature. Detailed observations of the ceria structure and platinum positions were made using TEM, and the particle formation mechanism in the flame was discussed based on the above results.
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| Free Research Field |
熱工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究により，火炎式噴霧熱分解における貴金属/酸化物粒子構造の形成機構の理解が進んだことにより，担持金属触媒として最適な構造を得るためのバーナー設計，前駆体選定，実験条件設定などの最適化へとつなげていくことが出来る．火炎式噴霧熱分解により，簡易なワンステップで高耐久と高活性を両立する微粒子構造の合成が実現できれば，これまでの多段かつ複雑なウェットプロセスに代わる新たな微粒子触媒作製プロセス技術として発展していく可能性を有する．
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