NEREUS – Next-Generation Scalable AEM Electrolysers as Sustainable Hydrogen Production System

The expansion of the hydrogen economy requires electrolysis systems that combine high efficiency, a long service life and economic manufacturability. This is precisely where NEREUS comes in: The project is developing AEM electrolysers as a promising technology for the sustainable production of green hydrogen. The focus is on the further development of low-temperature water electrolysis into systems that are both powerful and cost-efficient.

A key approach here is the utilisation of platinum-group-metal-free electrodes in combination with advanced membranes and precisely engineered components. The goal is to reduce material costs while simultaneously laying the technological foundation for robust, industry-ready electrolysis systems.

The system developed in the project is designed for direct DC-DC coupling with renewable energy sources and can therefore also be used in off-grid operation with low energy losses. At the same time, it can support grid-supporting functions such as frequency and voltage regulation. NEREUS thus contributes to both energy autonomy and grid stability.

In addition to system development, reliability, standardisation, and commercialisation also play a central role. For this reason, the project integrates advanced diagnostic tools and machine-learning models to recognise degradation mechanisms at an early stage and improve the systems’ service life. At the same time, regulatory requirements and certification pathways are taken into account early in the project. NEREUS is thus laying the groundwork for safe, interoperable, and market-ready AEM electrolysers in Europe’s energy transition.