Improvement on perovskite-type oxide catalyst prepared from a cyano complex precursor

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K05151
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 27030:Catalyst and resource chemical process-related
• Research Institution: Ehime University
• Principal Investigator: Yahiro Hidenori 愛媛大学, 理工学研究科(工学系), 教授 (90200568)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: ペロブスカイト型酸化物 / 金属シアノ錯体 / ブラウンミレライト型酸化物 / PM酸化反応

Outline of Final Research Achievements

Novel preparation method for yielding perovskite-type oxide catalyst, which is the thermal decomposition of heteronuclear cyano metal complex, has been already reported by us. The purpose of the present study is to prepare the improved perovskite-type oxide catalyst by the thermal decomposition of cyano metal precursor. We succeeded in (1) the preparation of LaFeO3 perovskite-type oxide catalysts partially substituted by Sr ion or Ce ion and (2) the preparation of LaFeO3 perovskite-type oxide with highly-dispersed Pd. The resulting improved LaFeO3 perovskite-type oxide catalysts were applied to the oxidation reaction of particulate matter.

Free Research Field

触媒化学，無機材料化学

Academic Significance and Societal Importance of the Research Achievements

本研究で注目するペロブスカイト型複合金属酸化物触媒は高い酸化活性を示すが，表面積が小さいという問題がある．申請者らは金属シアノ錯体前駆体の熱焼成によって高表面積のペロブスカイト型金属酸化物触媒の調製に成功し，実用化への糸口を発見した．また，この金属シアノ錯体はヘテロな金属イオンが原子状で混合された究極の前駆体であり，適切な変換を施せば，理想的な複合金属酸化物触媒を調製することができる．また，本法は金属を高分散担持できる方法でもあり，従来法では困難であった低表面積触媒への金属担持の設計指針を提案でき，学術的な意味合いも大きい．