Researchers from TU Berlin, Helmholtz Center Berlin, IMTEK at the University of Freiburg, and Siemens Energy have jointly developed an innovative alkaline membrane electrolyzer. This breakthrough, published in 'Nature Catalysis,' focuses on enhancing catalysts and membrane assemblies for efficient hydrogen production. By utilizing cost-effective nickel double hydroxide compounds with iron, cobalt, or manganese as anode catalysts, the electrolyzer aims to rival the performance of established PEM electrolyzers. Through the application of a newly developed membrane electrode unit coated with a layer-structured nickel-based catalyst, the team has achieved remarkable efficiency in hydrogen generation. Operando measurements conducted at the Berlin Bessy II X-ray source, coupled with international collaboration, have elucidated crucial catalytic processes on the catalyst-coated membrane. The identification of a catalytically active gamma phase in the new catalyst, which mimics iridium's performance, signifies a significant advancement in understanding catalytic mechanisms. Scalability and practicality are emphasized, with successful testing of a small cell marking progress towards industrial implementation of the AEM water electrolyzer. This research not only demonstrates the potential of nickel-based electrode materials but also contributes to fundamental insights into efficient hydrogen production processes.