Fraunhofer Institute for Solar Energy Systems ISE has made significant strides in the production of green hydrogen through proton exchange membranes (PEM) electrolysis. By using a screen printing process, the institute has successfully developed ultra-fine porous transport layers made of titanium to reduce material and manufacturing costs for PEM electrolyzers. These microporous transport layers (MPL) improve the contacting of catalyst layers, allowing for reduced iridium loading and thinner membranes, consequently decreasing costs and enhancing performance. The research at Fraunhofer ISE underscores the importance of optimizing porous transport layers (PTL) for efficient PEM electrolysis, a vital technology for the green hydrogen economy. The institute's efforts at the Hannover Messe include showcasing these innovations, seeking industrial partnerships for further advancements, and exploring customer-specific processes for membrane electrode assemblies. Moreover, Fraunhofer ISE's comprehensive expertise along the hydrogen value chain is demonstrated through their 3D exhibit on hydrogen infrastructure. The institute's commitment to enhancing the efficiency and cost-effectiveness of PEM electrolysis positions it at the forefront of driving innovation in green hydrogen production.