FeCoNiMn-MOF Heterojunction

100 h stable in alkaline seawater

Quaternary metal synergistic electronic redistribution lowers OER barrier and suppresses chloride adsorption, enabling durable seawater splitting.

Zhang, Xiaolin · Li, Hai · Yanzhou, Xiong · Yifei, Wu · Zhang, Kexi · 78099863 · Cao, Yang

Journal of Colloid and Interface Science 2026

Specifications

Overpotential

{'zh': '216', 'en': '216'} mV

Overpotential

{'zh': '264', 'en': '264'} mV

Tafel slope

{'zh': '32.61', 'en': '32.61'} mV dec⁻¹

Energy barrier

{'zh': '1.47', 'en': '1.47'} eV

Stability

{'zh': '100', 'en': '100'} h

Advantages

Suppresses chloride evolution

Fe doping weakens Cl⁻ adsorption, effectively suppressing the competing chlorine evolution reaction and preventing corrosive hypochlorite formation.

Low overpotential

Requires only 216 mV to reach 10 mA cm⁻² in alkaline seawater, outperforming most reported catalysts.

Long-term stability

Maintains performance for 100 hours in alkaline seawater, meeting durability demands for practical application.

Optimized reaction pathway

Fe doping switches the OER pathway from AEM to LOM, lowering the energy barrier to 1.47 eV and enhancing intrinsic activity.

Applications

• Seawater Electrolysis for Hydrogen：Enables direct hydrogen production from seawater, eliminating desalination steps and reducing costs.
• OER Electrocatalysts：Serves as an efficient oxygen evolution catalyst to reduce anode overpotential in water electrolysis.
• Electrolyzer Anodes：Can be used directly as an electrolyzer anode, maintaining stability in seawater environments.
• MOF-based Catalysts：MOF structure provides high surface area and tunable active sites, beneficial for catalytic reactions.