Engineering Ni/Ni 3 N/MoN interface with strain modulation toward sustainable high-current-density alkaline seawater hydrogen production via in situ ammonium formation

Key Points

• The aim is to enhance hydrogen production efficiency by optimizing the Ni/Ni3N/MoN interface through strain modulation.
• Designed a Ni/Ni3N/MoN interface for hydrogen production.
• Conducted tests in 1 M KOH natural seawater.
• Measured overpotential at varying current density levels.
• Analyzed stability over extended operation periods.
• Achieved an overpotential of 71 mV at 300 mA cm −2.
• Demonstrated stability for over 100 hours at 500 mA cm −2.
• In situ formation of NH4+ reduced corrosion of active sites.