In the realm of renewable energy, the generation of hydrogen via photo- and electrochemical water splitting has emerged as a focal point for energy storage and emissions reduction. However, achieving the desired efficiency remains a formidable challenge, primarily due to constraints in the performance of the anodic reaction involving the endergonic oxidation of water and the subsequent release of oxygen. Despite recent strides, current catalysts are either prohibitively expensive, or suffer from inadequate stability and durability. To address this pressing issue, an interdisciplinary and intersectoral Consortium comprised of seven academic and two industrial teams endeavors to pioneer a breakthrough solution. Our goal is to develop novel materials with enhanced catalytic activity in electrochemical and photochemical water oxidation reactions, coupled with stability under operational conditions. These materials will be rooted in polychelate, macrocyclic, and clathrochelate complexes of 3d-elements. The project will pursue systematic synthetic strategies to obtain the desired water oxidation catalysts, followed by comprehensive characterization employing various analytical, structural, and physico-chemical methods. By elucidating the factors influencing the catalytic efficiency of water oxidation catalysts, the Consortium aims to facilitate the rational design of novel photo- and electrocatalytic systems for hydrogen and oxygen production from water. Furthermore, pathways for leveraging these new substances as highly effective homogeneous and immobilized molecular catalysts for photo- and electrochemical water splitting will be explored, fostering innovative technological solutions for energy conversion and environmental preservation. Through this staff exchange program, we anticipate promoting and enhancing the complementarity of the participating teams, fostering cross-fertilization, and cultivating a hub of synergy in research, innovation and technology.