Organic Frameworks for Novel Cobalt Glyoximes as Potential Hydrogen Catalysts

The increasing demand for sustainable energy solutions has prompted the development of cost-effective catalysts for hydrogen production. This research investigates cobalt bis(glyoxime) (cobaloxime) complexes as potential hydrogen evolution catalysts composed of earth-abundant materials. The study focuses on synthesizing novel glyoxime ligands with varying electron-donating and -withdrawing properties to modulate the redox behavior of cobalt centers. Ligands with N-alkyl and p-aniline substituents were synthesized and characterized by NMR, IR, UV-vis, elemental analysis, and mass spectrometry. The corresponding cobaloximes were evaluated using cyclic voltammetry and other spectroscopic methods to determine their electrochemical and structural properties. Results indicate that modifying the ligand environment can significantly shift the cobalt(II)/cobalt(I) redox potential, potentially improving catalytic activity under more neutral pH conditions. While synthesis and full characterization of all target complexes are ongoing, initial findings demonstrate the viability of tailoring cobalt complexes for efficient hydrogen evolution catalysis.