Electrochemical Conversion of Low-Concentration CO₂ Promoted by a Guanidine Polymer

In situ electrocatalytic conversion of low-concentration carbon dioxide (CO₂) from anaerobic fermentation gas (AFG) into high-value chemical products can effectively mitigate the costs associated with carbon capture, enrichment, and transfer. In this study, we synthesized a guanidine-based porous organic polymer (G-POPs-1), which efficiently enriches and activates diluted CO₂ to form a "carbon-pool". Subsequently, through indirect electromediated oxidation, the 4-pentenamine substrate underwent sequential cyclical reactions to produce proline carbamate. Moreover, after six cycles of use, G-POPs-1 exhibited minimal degradation in catalytic performance, with its microstructure remaining intact.