High-Entropy Selenide OER Electrocatalyst
Suppressed Se leaching, durable OER
Multimetallic high-entropy composition mitigates selenium loss and improves OER durability compared to conventional selenides.
Yuqian, Shangguan · Zhao, Jiachang · Wang, Yuanqiang · Li, Jing · Jin, Jun · Jiajun, Chen
International Journal of Hydrogen Energy 2026
Specifications
- Overpotential
- {'zh': '387', 'en': '387'} mV
- Stable operation time
- {'zh': '24', 'en': '24'} h
Advantages
Suppressed Se leaching
The high-entropy multimetallic composition stabilizes Se through synergistic effects; ICP-OES confirms reduced Se leaching compared with NiCo₂Se₄, extending catalyst lifetime.
Durable OER
Stable operation for 24 h at 20 mA cm⁻² is achieved, enabled by surface reconstruction into a stable active phase for long-term electrolysis.
Abundant active sites
High configurational entropy from multi-element mixing provides abundant active sites that lower the reaction barrier.
Applications
- Water electrolysis for hydrogen production：Used as anode for oxygen evolution, reducing energy consumption in water electrolysis and improving hydrogen production efficiency.
- Electrocatalytic oxygen evolution：Acts as a high-activity OER catalyst, replacing precious metals in alkaline media.
- Fuel cell oxygen electrode：The high-entropy structure is stable, serving as a durable catalyst for fuel cell oxygen electrodes.
- Green hydrogen devices：Provides an efficient and durable anode material for green hydrogen devices, reducing system maintenance costs.