Core-Shell Heterostructure HER Electrocatalyst

37 mV overpotential

A core-shell SrRuO3@Co3S4 heterostructure with enhanced HER activity via interfacial charge transfer.

Pengfei, Tan · Chenhui, Huang · Zhu, Chuanhui · Tian, Hao · Liang, Min · Lan, Bang · Wang, Jing · Li, Manrong

International Journal of Hydrogen Energy 2026

Specifications

HER overpotential

{'zh': '37', 'en': '37'} mV

Stability

{'zh': '170', 'en': '170'} h

Advantages

Ultralow overpotential

Interfacial charge transfer from Co to Ru optimizes intermediate binding energy, enabling HER at a very low overpotential.

Durable over 170 h

Core-shell architecture and carbon shell protection maintain stability over 170 h of continuous operation, suitable for long-term industrial electrolysis.

Beats Pt/C at high currents

At high current densities, its performance surpasses commercial Pt/C, making it suitable for industrial electrolyzers requiring high currents.

Generalizable strategy

Leveraging heterointerface engineering to modulate charge transfer provides a generalizable approach for designing efficient perovskite-based electrocatalysts.

Applications

• Water electrolysis for hydrogen production：Replace precious metal catalysts for efficient hydrogen production at low overpotential.
• Alkaline electrolyzers：High activity and durability under alkaline conditions, suitable for long-term operation of alkaline electrolyzers.
• Green hydrogen production：Reduce the cost of green hydrogen production by offering a stable and efficient non-noble-metal catalyst.
• Electrochemical energy conversion：Enhance electrochemical conversion efficiency via interface engineering, applicable to various energy conversion devices.