Chemical Hydrogen Production Based On Zirconium -Based MOFs

Metal-organic frameworks (MOFs), which are formed by combining metal ions or clusters with organic linkers, are considered an exceptional type of porous material renowned for their remarkable catalytic abilities. UiO-type frameworks (UiOs) are a subclass of MOFs characterized by their exceptional structural robustness and stability under harsh conditions. UiOs are typically composed of high-valent metal centers, such as zirconium (Zr⁴⁺), coordinated to multifunctional organic ligands, typically dicarboxylates like terephthalic acid (BDC). UiOs are highly tunable, allowing for precise control over pore size, surface area, and functionality, making them ideal candidates for applications in gas adsorption, separation, catalysis, and sensing, particularly in processes requiring high stability and versatility in extreme conditions. Unfortunately, catalytically active sites are not accessible in many MOFs. Two approaches have been applied to overcome the major drawbacks of MOFs and their application as a highly versatile platform for catalysis: ۱) pore engineering to achieve suitable catalytically active MOFs and to modify their catalytic moieties; ۲) generation of coordinated unsaturated metal active sites by removal of coordinating solvent molecules and/or controlled thermal dissociation processes to create Lewis acid centers.

کلیدواژه ها:

Defective MOF ، Modulator approach ، De novo synthesis ، UiO-۶۶