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Together with Heraeus Precious Metals Smoltek Hydrogen develops next-generation, ultra-low iridium Porous Transport Electrodes (PTEs) for Proton Exchange Membrane (PEM) water electrolysis. As a major milestone in this partnership, the companies will initiate a rigorous 3,000-hour long-term durability test this autumn.
In a joint press relase the companies states that the testing campaign will specifically evaluate the long-term operational stability of Smoltek’s proprietary nanostructured iridium catalyst layer, marking a critical step toward the commercialization and large-scale industrialization of cost-effective green hydrogen production.
This joint effort directly addresses one of the primary bottlenecks in scaling PEM electrolysis: the high cost of iridium. By drastically reducing the required loading without sacrificing durability. Smoltek Hydrogen and Heraeus Precious Metals are paving the way for the expansion of the global green hydrogen infrastructure.
“Our nanostructured layer offers a unique capability to maximize charge and mass transport properties within a thickness of just a few microns. By optimizing this specific catalyst architecture, we can simultaneously maintain high electrolyzer efficiency while successfully reducing the amount of iridium needed to below 0.1 mg/cm² loading.”
Fabian Wenger, Head of R&D at Smoltek Hydrogen
The collaboration leverages Smoltek’s innovative nanotechnology alongside Heraeus Precious Metals’ world-class expertise in precious metal electrocatalysts and material analysis. Testing and validation are central to transitioning this breakthrough from the laboratory to industrial application. Heraeus Precious Metals will lead the upcoming testing phase, bringing extensive resources to evaluate the catalyst’s performance under realistic operational conditions.
“We are looking forward to commencecommencing this extensive testing campaign and to provide the critical material analysis required to validate this technology. With our capabilities we will continue to support all steps towards an industrialization of these highly promising ultra-low iridium PTEs with our comprehensive analytical and testing capabilities.”
Christian Gebauer, Head of Innovation at the Hydrogen Systems Division of Heraeus Precious Metals
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News
August 10, 2026
Together with Heraeus Precious Metals Smoltek Hydrogen develops next-generation, ultra-low iridium Porous Transport Electrodes (PTEs) for Proton Exchange Membrane (PEM) water electrolysis. As a major milestone in this partnership, the companies will initiate a rigorous 3,000-hour long-term durability test this autumn.
News
January 28, 2026
Smoltek Hydrogen, has been selected as one of nine Swedish cleantech companies to join the Swedish-German Cleantech Platform 2026. This strategic program, managed by the Swedish Energy Agency and the German-Swedish Chamber of Commerce, gives the opportunity to accelerate the company’s commercial expansion into Germany — Europe's leading and most dynamic market for green hydrogen and fuel cell technology.
News
November 20, 2025
We have launched a podcast about materials technology and investments in general and our disruptive carbon nanotechnology in particular.
News
November 4, 2025
Smoltek Hydrogen has received an order for samples of low iridium-load Porous Transport Electrodes (PTE) for PEM electrolyzers. The electrodes will be used in a joint development project with Heraeus Precious Metals, a global leader in precious metals.
News
October 30, 2025
Smoltek Hydrogen recently participated in the Hydrogen Technology World Expo 2025 in Hamburg, Germany – the world’s largest industry event for innovation in hydrogen and electrolysis technology. Ellinor Ehrnberg, President of Smoltek Hydrogen, was invited to a panel discussion on the topic “Overcoming the Key Obstacles in Electrolyzer Expansion”