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Saturday, September 30, 2023

Innovative Approach Takes Us Closer to Affordable Hydrogen

Scientists at Umeå University have achieved a significant breakthrough that could lead to more cost-effective hydrogen production—a vital step in our transition to a sustainable and carbon dioxide-free fuel.

The research team, led by Eduardo Gracia from the Department of Physics, has developed a novel method to enhance the efficiency of generating hydrogen gas from water and electricity.

This groundbreaking advancement, detailed in the recently published study in Communications Engineering, holds great promise for harnessing hydrogen gas as a clean energy source to replace fossil fuels.

The process of water electrolysis, which splits water into hydrogen and oxygen, plays a crucial role in this endeavor. To facilitate the reaction, an electrocatalyst is required, with the most efficient technology currently being proton exchange membrane (PEM) water electrolysis.

Overcoming Noble Metal Dissolution

Despite the efficiency of proton exchange membrane (PEM) water electrolysis in hydrogen production, there is a significant drawback. The process relies on noble metals like platinum, ruthenium, and iridium as catalysts. While these metals exhibit excellent performance, they are expensive, limited in supply, and prone to degradation over time.

Associate Professor Eduardo Gracia emphasizes the issue of noble metal dissolution, which hampers the long-term effectiveness of hydrogen production. Addressing this challenge is essential to fully unlock the potential of PEM technology.

Revolutionary Scaffold Approach Paves the Way for Sustainable PEM Technology

Umeå University researchers, led by Eduardo Gracia, have achieved a groundbreaking development in addressing the degradation of strong electrocatalysts in proton exchange membrane (PEM) technology. By utilizing a unique scaffold—a stable and inactive structure—the team has successfully trapped expensive noble metals, ensuring their stability even under challenging conditions.

The scaffold, composed of a blend of tin, antimony, molybdenum, and tungsten oxides (Sn-Sb-Mo-W), not only shields the noble metals but also safeguards other system components from deterioration throughout the process.

The implications of this breakthrough are far-reaching. By extending the lifespan of noble metals, the findings contribute to the affordability and effectiveness of large-scale, renewable hydrogen production through PEM technology. This pivotal advancement brings us closer to realizing a sustainable society by facilitating the transition to clean and renewable energy sources.

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