| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 봄 (04/07 ~ 04/09, 대전컨벤션센터) |
| 권호 |
46권 1호 |
| 발표분야 |
분자전자 부문위원회 Ⅰ |
| 제목 |
TiO2 Immobilization of Molecular Ru(II) Catalyst Promotes its Monomeric Catalytic Route and Secures the Efficient and Steady Photocatalytic CO2 to CO/Formate Conversion |
| 초록 |
Herein, we employed the TiO2 immobilization of molecular Ru(II) catalyst, (4,4′-Y2-bpy)RuII(CO)2Cl2 (RuP; Y = CH2PO(OH)2), as a method to secure the efficient and steady catalytic activity of molecular bipyridyl Ru(II) complex-based photocatalytic system for CO2 reduction. From series of operando FTIR spectrochemical analysis, it was found that TiO2-fixation of molecular Ru(II) complex leads to the efficient stabilization of monomeric key intermediate, Ru–hydride (LRuII(H)(CO)2Cl), and suppresses the formation of polymeric Ru(II) complex (–(L(CO)2Ru‒Ru(CO)2L)n–), a major deactivation pathway, during photoreaction, unlike solution mechanism of Ru(II) catalyst involving the considerable Ru–Ru dimeric route. The active promotion of hetero-binary system (IrPS + TiO2/RuP) that uses TiO2-bound Ru(II) complex as reduction catalyst led to the highly increased activity and durability of photocatalytic behavior giving the maximal TON of ＞4816 and ＞2228 for CO and HCOO‒ production. |
| 저자 |
최민수, 이대한, 서윤정, 최성한, 김소연, 백창현, 강상욱, 손호진
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| 소속 |
고려대 |
| 키워드 |
CO2 to formate conversion; organic-inorganic hybrid systems; molecular catalyst TiO2 immobilization; heterogeneous catalysis; photocatalysis
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| E-Mail |
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