The electrochemical utilization of hydrogen has several advantages, particularly in fuel cells where electrochemical conversion can lead to higher energy efficiency compared to thermochemical processes. Typically, these processes have zero (or near-to-zero) emissions during operation with the typical byproduct being water. Fuel cells can be utilized across various sectors, including transportation, stationary power generation, and portable devices, and therefore have a huge decarbonization potential. RA4 focuses on research and development along various lines from electrochemistry and materials to fuel cell systems for driving improvements in their performance, enhancing durability, reducing costs, and expanding the range of applications. Additionally, RA4 considers the interaction of these aspects and the mutual influence of boundary conditions. The following sub-topics will be addressed:

1. Electrochemistry in fuel cells
2. Materials characterization in fuel cells
3. Fuel cell systems