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Water Electrolysis Beyond Platinum: Carbon Nitride Materials for Electrochemical Hydrogen Evolution
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Date
2025-12-04
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Abstract
A facile approach is presented for the scalable generation of porous, ultralong carbon nitride nanoscrolls as electrocatalysts for electrochemical hydrogen storage and evolution. Activation of C3N4 by subpotential reduction reveals a new material that stores and finally evolves hydrogen, with a performance being superior to Platinum. The optimized system displays an overpotential (η10 = 7 mV) close to commercial Pt/C but provides a superior current density (up to ≈1.3 A cm−2), turnover frequency, HER rate, and higher stability. Additionally, at underpotential conditions, ≈1.5 wt.% activated hydrogen can be stored at ambient pressure and room temperature in such materials.