| 학회 |
한국공업화학회 |
| 학술대회 |
2021년 봄 (05/12 ~ 05/14, 부산 벡스코(BEXCO)) |
| 권호 |
25권 1호 |
| 발표분야 |
포스터-환경·에너지 |
| 제목 |
Photocatalytic CO2-to-Formate/CO Conversion by Using Cationic Pentamethylcyclopentadienyl-Iridium(III) Complexes and Its Mechanistic Investigation |
| 초록 |
This study details the photocatalytic CO2-to-CO or formate conversion activities of two different photocatalytic systems (IrPS + Cp*IrPE and IrPS/TiO2/Cp*IrP) to evaluate the catalytic behavior of homogeneous and heterogenized Cp*Ir(III) catalyst. The photolysis of the mixed homogeneous system in the presence of 3 vol % water exhibited a maximal turnover number (TON) of ~800 for 48 h with a high product selectivity of formate (＞97%), while the ternary hybrid system showed the relatively lower but steady CO2-to-CO and CO2-to-formate conversion activities (a TON of ＞560 for 100 h). The mechanistic investigations suggests that the occurrence of MLCT ([Cp*IrII(bpy)]+ → [Cp*IrIII(bpy•–)]+) onto the electron-withdrawing n-type TiO2 opens catalytic route toward Cp*IrIII-COOH intermediate that results in CO2-to-CO conversion, apart from the typical catalytic route via Cp*IrIII–H intermediate for formate production. |
| 저자 |
이대한, 서윤정, 이상훈, 김철훈, 강상욱, 손호진
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| 소속 |
고려대 |
| 키워드 |
Cp*Ir(III) catalyst; Photochemical CO2-to-Formate conversion
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| E-Mail |
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