Design of perovskite-type oxides by structural distortion as acid and base properties

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K20482
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0401:Materials engineering, chemical engineering, and related fields
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: AIHARA Takeshi 東京工業大学, 科学技術創成研究院, 研究員 (00909583)
• Project Period (FY): 2021-08-30 – 2023-03-31
• Keywords: ペロブスカイト酸化物 / チタン酸ストロンチウム / 酸・塩基触媒 / 液相有機合成 / 炭素-炭素結合形成

Outline of Final Research Achievements

In this study, highly pure perovskite oxide nanoparticles having high specific surface were successfully synthesized by sol-gel method using water-soluble metal precursors and dicarboxylic acids. Strontium titanate (SrTiO3) showed the highest specific surface area among the obtained perovskite oxides and the value was 46 m2g-1 which was 10 times larger than that of commercial SrTiO3. Furthermore, the synthesized SrTiO3 also showed the highest catalytic performance for the cyanosilylation of carbonyl compounds with trimethyl cyanide and Knoevenagel condensation of benzaldehyde with active methylene compounds among the tested catalysts. Detailed surface analysis including FT-IR, TPD, poisoning effect for the reactions revealed that SrTiO3 has both acid and base sites on its surface, resulting in highly catalytic activity.

Free Research Field

触媒化学

Academic Significance and Societal Importance of the Research Achievements

本研究成果にて、ペロブスカイト酸化物が液相の有機合成反応に対し高い触媒活性を示すことが明らかとなったが、今後はさらに多くのファインケミカルズ合成への応用が見込まれる。高価な有機化合物を容易に合成できれば、続く変換によって機能性材料や医薬品合成の低コスト化ならびに環境負荷の低減に貢献できる可能性がある。
またペロブスカイト酸化物は元素置換などが容易に可能な材料として知られているが、これを応用することで、触媒性能のさらなる高機能化が期待できる。