4.6 Article

Surface Modification of a MOF-based Catalyst with Lewis Metal Salts for Improved Catalytic Activity in the Fixation of CO2 into Polymers

Journal

CATALYSTS
Volume 9, Issue 11, Pages -

Publisher

MDPI
DOI: 10.3390/catal9110892

Keywords

heterogeneous catalysis; metal organic framework; surface modification; Zinc glutarate; CO2 fixation; polycarbonate

Funding

  1. Korea CCSR&DCenter (KCRC) - Korea government (Ministry of Science, ICT & Future Planning) [2014M1A8A1049300]
  2. National Research Foundation of Korea [2014M1A8A1049300, 2017M1A8A1072051] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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The catalyst zinc glutarate (ZnGA) is widely used in the industry for the alternating copolymerization of CO2 with epoxides. However, the activity of this heterogeneous catalyst is restricted to the outer surface of its particles. Consequently, in the current study, to increase the number of active surface metal centers, ZnGA was treated with diverse metal salts to form heterogeneous, surface-modified ZnGA-Metal chloride (ZnGA-M) composite catalysts. These catalysts were found to be highly active for the copolymerization of CO2 and propylene oxide. Among the different metal salts, the catalysts treated with ZnCl2 (ZnGA-Zn) and FeCl3 (ZnGA-Fe) exhibited similar to 38% and similar to 25% increased productivities, respectively, compared to untreated ZnGA catalysts. In addition, these surface-modified catalysts are capable of producing high-molecular-weight polymers; thus, this simple and industrially viable surface modification method is beneficial from an environmental and industrial perspective.

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