Chemical fixation of carbon dioxide into commodity chemicals is an appealing approach for CO₂ transformations and utilizations. The challenge is to develop highly efficient and reusable heterogeneous catalysts. Herein, a cobalt-porphyrin modified graphene oxide (GOPCoCl) has been prepared with chemical functionalization by the acylation and amidation process on the graphene oxide support, and applied as a heterogeneous catalyst for the solvent-free cycloaddition of carbon dioxide and epoxides. The as-received GOPCoCl has been characterized by different methods, demonstrating that the metalloporphyrin is covalently linked to the graphene oxide (GO) surface. Owing to the uniform active sites and support effects, the catalyst behaved efficient catalytic performance, excellent recyclability, and good substrate expansibility for this solvent-free cycloaddition. Moreover, a synergetic catalytic mechanism has been prudently proposed based on the catalytic system and experimental results.

将二氧化碳化学固定为商品化学品是CO _2的一种有吸引力的方法转换和利用。挑战在于开发高效且可重复使用的非均相催化剂。在本文中，已经通过在氧化石墨烯载体上的酰化和酰胺化工艺，通过化学官能化制备了钴-卟啉改性的氧化石墨烯（GOPCoCl），并被用作非均相催化剂用于二氧化碳和环氧化物的无溶剂环加成。所接收的GOPCoCl已通过不同的方法进行了表征，表明金属卟啉与氧化石墨烯（GO）表面共价连接。由于具有均匀的活性位点和载体效应，该催化剂在这种无溶剂的环加成反应中表现出有效的催化性能，出色的可回收性和良好的底物可扩展性。而且，