Proton Exchange Membrane Water Electrolysis (PEMWE) technology relies on porous transport layers (PTLs) to provide efficient gas and liquid transport, electrical conductivity and mechanical support. However, the reliance on platinum group metals (PGMs) poses challenges due to high cost and limited availability. By reducing PGM dependency, this approach aims to develop cost-effective, sustainable PTLs with tailored properties that will improve the efficiency and scalability of PEMWE technology. This study investigates the fabrication of multi-material PTLs, specifically Ti|316 and Nb|316, through a co-sintering process and subsequent nitruration. The nitriding process aims to enhance surface properties and corrosion resistance. The research will focus on analysing interfacial diffusion and the formation of intermetallic regions to ensure mechanical integrity and optimum performance. Electrochemical corrosion tests evaluate the durability and behaviour of these structures, targeting improved efficiency and scalability for PEMWE systems.
Villemur et al. (2025) studied this question.