Catalytic resins significantly enhance the electrical properties of electrochemical systems for hydrogen evolution reactions (HER) by providing a conductive and ionically active matrix that facilitates efficient charge and mass transport. The embedded ion-exchange sites improve proton mobility, ensuring rapid delivery to the catalytic centers while minimizing resistance losses during the electrochemical process. Additionally, the stable integration of metal complexes within the resin reduces charge recombination and enhances electron transfer efficiency, leading to improved catalytic performance and lower overpotentials for HER.