Researchers Develop New Catalyst for Clean Hydrogen Production
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A research team has developed a new catalyst for producing clean hydrogen fuel using renewable electricity. The catalyst, which replaces expensive platinum-based materials, performed better than a leading state-of-the-art cathode and operated for over 1,000 hours at industry-level current densities.
Facts First
- A new catalyst combining rhenium phosphide and molybdenum phosphide was developed for hydrogen production systems.
- The catalyst replaces expensive platinum-based materials in anion-exchange membrane water electrolyzers (AEMWE).
- The system performed better than a leading state-of-the-art cathode, including one based on platinum group metals.
- The catalyst operated for more than 1,000 hours at industry-level current densities.
- The work was conducted at a laboratory scale and supported by startup funds at Washington University in St. Louis.
What Happened
A research team led by Professor Gang Wu developed a new catalyst for an anion-exchange membrane water electrolyzer (AEMWE). The catalyst combines rhenium phosphide (Re2P) and molybdenum phosphide (MoP). The rhenium component helps hydrogen attach to and release from the catalyst surface, while the molybdenum speeds up the splitting of water in the alkaline electrolyte. The team paired the new catalyst with a nickel iron anode. The system performed better than a leading state-of-the-art cathode, including one based on platinum group metals (PGM), and operated for more than 1,000 hours at industry-level current densities of 1 and 2 amperes per square centimeter.
Why this Matters to You
Clean hydrogen fuel produced from renewable electricity could help cut harmful emissions and reduce reliance on fossil fuels. This new catalyst may help lower the cost of producing that hydrogen by replacing expensive platinum-based materials. If this technology scales successfully, it could lead to more affordable and efficient clean energy systems.
What's Next
The experiments were conducted at a laboratory scale. Further research and development will be needed to scale the technology for commercial use.