Fe-doped CoP/Co₂P heterostructure

pH-universal HER

Through temperature-controlled phase evolution and Fe doping, it achieves low overpotentials at industrial current densities in both acidic and alkaline media, and remains stable in seawater.

Xuemei, Han · Mingsong, Fan · Zi-Han, Lin · Cui, Lili · Jin E.

International Journal of Hydrogen Energy 2026

Specifications

Overpotential (acidic media)

{'zh': '160', 'en': '160'} mV

Overpotential (alkaline media)

{'zh': '214', 'en': '214'} mV

Stability

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

Advantages

pH-universal activity

In acidic and alkaline media, it requires overpotentials of only 160 and 214 mV to achieve 500 mA cm⁻², meeting industrial current density demands.

Stable in seawater

It maintains continuous operation for 100 h in complex saline and seawater environments with minimal potential decay and near-unity Faraday efficiency.

Applications

• water electrolysis：As an efficient HER catalyst, it reduces energy consumption in water electrolysis.
• seawater electrolysis：It remains stable in saline and seawater, enabling direct seawater electrolysis.
• industrial electrolyzers：Low overpotentials at high current densities make it suitable for industrial electrolyzers.