Green hydrogen starts with smart materials. At the core of hydrogen production through electrolysis is a component often overlooked, yet absolutely critical: the Porous Transport Layer (PTL). In PEM and AEM electrolyzers, the PTL sits between the catalyst layer and the flow field. This porous, metallic structure plays a pivotal role in optimizing the performance, efficiency, and durability of the electrolyzer.
Without a high-functioning PTL, electrolyzers fall short of the demands required for large-scale hydrogen production. But a high-performance PTL supports efficient water electrolysis enables mass transfer of water and oxygen, electrical conductivity across the cell, thermal management, mechanical support, corrosion resistance, and more.
We specialize in advanced metal fiber-based PTLs — engineered to meet the extreme demands of modern electrolyzers. Compared to traditional mesh or foam structures, our metal fiber media delivers high porosity for low pressure drop and optimal gas/liquid transport, superior mechanical strength for long-term stability, and tailored surface properties.
Our portfolio is engineered to support both systems, with materials selected for chemical compatibility and cost efficiency. But different electrolyzer chemistries require different PTL materials. PEM Electrolyzers are acidic and oxidative, and typically use titanium. AEM Electrolyzers are an alkaline environment, utilizing nickel and stainless steel.
Ready for the future of hydrogen? As electrolyzer technology evolves, so do the demands on PTLs. From scaling up production to achieving longer lifetimes and higher efficiency, tomorrow’s challenges require advanced material solutions today. That’s where Bekaert comes in.
