The development of effective and low-energy-consumption catalysts for CO_(2)conversion into high-value-added products by constructing versatile active sites on the surface of heterogeneous compounds is an ur-gent and ...The development of effective and low-energy-consumption catalysts for CO_(2)conversion into high-value-added products by constructing versatile active sites on the surface of heterogeneous compounds is an ur-gent and challenging task.In this study,a stable and well-defined heterogeneous cobalt hexacyanocobal-tate(Co_(3)[Co(CN)_(6)]_(2)),typical cobalt Prussian blue analogue(CoCo-PBA)modified with tetrabutylammo-nium bromide(TBAB),is proven to be the superior catalyst for CO_(2)and epoxide coupling to produce cyclic carbonates with>99%yield under mild reaction conditions(1.0 MPa,65℃).Based on a series of characterizations,it is revealed that the CoCo-PBA structure can maintain relatively high thermal and chemical stability.Recycling experiments exhibited that the CoCo-PBA system could retain 98%of the original activity after six reaction rounds.The CoCo-PBA/TBAB catalytic system was also highly active for coupling CO_(2)with other industrial-grade epoxides.These results show the Co Co-PBA catalytic system potential flexibility and the generality of the catalyst preparation strategy.展开更多
基金financial support of the National Natural Science Foundation of China (Nos.21774108 and 51973190)。
文摘The development of effective and low-energy-consumption catalysts for CO_(2)conversion into high-value-added products by constructing versatile active sites on the surface of heterogeneous compounds is an ur-gent and challenging task.In this study,a stable and well-defined heterogeneous cobalt hexacyanocobal-tate(Co_(3)[Co(CN)_(6)]_(2)),typical cobalt Prussian blue analogue(CoCo-PBA)modified with tetrabutylammo-nium bromide(TBAB),is proven to be the superior catalyst for CO_(2)and epoxide coupling to produce cyclic carbonates with>99%yield under mild reaction conditions(1.0 MPa,65℃).Based on a series of characterizations,it is revealed that the CoCo-PBA structure can maintain relatively high thermal and chemical stability.Recycling experiments exhibited that the CoCo-PBA system could retain 98%of the original activity after six reaction rounds.The CoCo-PBA/TBAB catalytic system was also highly active for coupling CO_(2)with other industrial-grade epoxides.These results show the Co Co-PBA catalytic system potential flexibility and the generality of the catalyst preparation strategy.
