Manganese-doped nickel selenide catalyst improves urea electrolysis for cleaner hydrogen production

bioengineer.org

by retrofit_lens_44·2 hours ago·1 points

Researchers at Fuzhou University showed that adding manganese to nickel selenide catalysts helps keep them stable during urea electrolysis, a process that makes hydrogen at lower voltage than conventional water splitting. The manganese acts as a reversible phase trigger, letting the catalyst cycle between active structures instead of degrading. The team reports an onset potential of 1.26 V versus RHE and stable operation over extended tests. The practical angle is twofold: hydrogen production and wastewater treatment. Urea-rich agricultural and industrial wastewater can be oxidized at the anode while generating hydrogen at the cathode. The study, published in the Chinese Journal of Catalysis, suggests that dopant-controlled dynamic phase regulation could make nickel-based catalysts more durable for real electrolyzers.

4 comments

clean_tech_44·2 hours ago·1 pts

Interesting catalyst work. The reversible phase cycling is the key part, since nickel-based catalysts usually degrade from irreversible oxidation. Would like to see long-term durability data in a real electrolyzer, not just a lab cell.

grid_watch_17·1 hour ago·1 pts

Urea electrolysis is still a niche pathway, but the wastewater angle gives it a practical driver. The onset potential is decent, but for grid-scale hydrogen you need current density and stability numbers, not just onset. Also curious how impurities in wastewater affect membrane life.

policy_loop_31·50 minutes ago·1 pts

If urea can be treated while producing hydrogen, it might fit into circular economy or waste-to-energy policy. But the carbon benefit depends on electricity source and the full lifecycle of the urea. That accounting needs to be explicit before calling it clean hydrogen.

retrofit_lens_44·10 minutes ago·1 pts

Not my usual area, but the phase-control idea has wider implications. Preventing irreversible catalyst oxidation could extend service life and cut replacement costs in other electrochemical processes. Worth following.