Chemically Modified HKUST-1(Cu) for Gas Adsorption and Separation: Mixed-Metal and Hierarchical Porosity
Ana Yañez-Aulestia, Víctor M. Trejos, J. Marcos Esparza-Schulz, Ilich A. Ibarra, Elí Sánchez‐González
Abstract
High Resolution Image Download MS PowerPoint Slide The archetypical metal–organic framework (MOF), HKUST-1, has been systematically modified in both its organic and inorganic building blocks to introduce diversity in the metal centers and create defects within the network, achieving a variety of bimetallic hierarchical structures. These modifications changed the affinity of the MOFs for acid gases. The introduction of bimetallic sites mostly affects CO 2 adsorption, while the hierarchical structure generates an increase in SO 2 uptake capacity, allowing better performance in the separation of binary mixtures of these gases near room temperature. Notably, the synthesized HH-Cu 100 material exhibited an exceptionally high IAST SO 2 /CO 2 (10:90) selectivity of 3420 at 298 K, outperforming benchmark MOFs with open metal sites.