Liquid Na/K Alloy Interfacial Synthesis of Functional Porous Carbon at Ambient Temperature. (9th May 2022)

• Record Type: Journal Article
• Authors: Tang, Duihai; Wang, Tao; Zhang, Wenting; Zhao, Zhen; Zhang, Ling; Qiao, Zhen‐An
• Is Part Of: Angewandte Chemie. Volume 134:Number 27(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-05-09
• Subjects: Cycloaddition of CO2 -- Interfacial Engineering -- Liquid Metal -- Porous Carbon -- Sodium Potassium Alloy; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202203967
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: The functional groups in porous carbon generally suffer a severe loss during the high‐temperature carbonization. Instead, the low‐temperature synthesis of carbon featuring porous structures and abundant functional groups is not only a solution that evades the pitfalls of pyrolysis but also is of significance for the development of synthetic methodology. Herein, a liquid metal interfacial engineering strategy is reported for the synthesis of porous carbon using CCl4 as the carbon precursor and sodium‐potassium alloy (NaK) as the reducing agent, which is superior to traditional synthetic methods because it enables the engineering of a highly active liquid metal alloy microemulsion to directly generate porous carbon at ambient temperature. As synthesized porous carbon featured abundant carbon‐chlorine bonds can be tandem‐grafted with imidazole and 1, 2‐dibromoethane to achieve a CO2 cycloaddition catalyst, which exhibits excellent catalytic activity, in addition to exceptional stability. Abstract : Porous carbons were directly synthesized under ambient temperature via a liquid metal interfacial engineering strategy. Unlike the traditional carbons, these materials are abundant with active sites of C−Cl bonds. Imidazole and 1, 2‐dibromoethane were tandem‐grafted on this porous carbon. Amine and bromide ion showed a synergistic effect to promote the catalytic reaction for cycloaddition of CO2, resulting in excellent catalytic performance.