| 학회 |
한국공업화학회 |
| 학술대회 |
2022년 봄 (05/11 ~ 05/13, 제주국제컨벤션센터(ICC JEJU)) |
| 권호 |
26권 1호 |
| 발표분야 |
포스터-촉매 |
| 제목 |
Unprecedented dependence of catalytic activities on the synthetic origin of metal-organic frameworks: The case of ZIF-8 on CO2 cycloaddition |
| 초록 |
Catalytic activities of three kinds of ZIF-8s, two of which were prepared in aqueous and methanolic media and the other commercially procured, were investigated. Intriguingly, only the aqueous-derived ZIF-8 demonstrated a significant catalytic activity towards CO2 cycloaddition to epichlorohydrin for producing chloropropene carbonate. In contrast, the other ZIF-8s displayed poor or no catalytic activity. It was found that water molecules occluded inside the post-synthesis pore structures led to the dissociation of Zn-N (pyrrolic and pyridinic) bonds and the subsequent formation of active sites essential for CO2 fixation. Analyses also revealed the generation of hydroxyl-coordinated Zn species accompanied by structural densification. These newly formed Zn species, which also served as Lewis acids and bases, were crucial in achieving a marked CO2 cycloaddition performance. |
| 저자 |
Sim Tristan James, 이기훈, 최정규
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| 소속 |
고려대 |
| 키워드 |
Metal-organic framework; ZIF-8; CO2; cycloaddition
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| E-Mail |
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