Phenolic Resin‐type Microporous Organic Polymers for High‐Performance Carbon Capture

Three new types of Si‐centered porous organic polymer (Si‐POPs) were successfully prepared using phenolic resin‐type chemistry to form C−C bonds. This new family of microporous Si‐POPs manifests as uniform, microporous, spherical particles with a high specific surface area. Notably, Si‐POPs were engineered to possess varying numbers of hydroxyl (‐OH) groups by altering the monomer in the synthetic process. Among these materials, the variant with the highest number of hydroxyl groups exhibited ultra‐high CO2 adsorption capacity, reaching up to 4.3 mmol g–1 at 273 K and 1.0 bar, which surpasses the performance of most porous polymers. Furthermore, Si‐POPs also demonstrated remarkable selectivity adsorption for carbon dioxide over nitrogen (17–50, IAST at 273 K and 1.0 bar). This study not only highlighted the superior CO2 adsorption properties of Si‐POPs but also explored their potential application in selective CO2 adsorption.