What question did this study set out to answer?

This work aims to develop a durable and efficient Pt-free cathode for anion exchange membrane water electrolysis.

May 17, 2026

Ultralow-Platinum Cathode Enables High-Performance Anion Exchange Membrane Water Electrolysis

Key Points

This work aims to develop a durable and efficient Pt-free cathode for anion exchange membrane water electrolysis.
Utilized ultrafast Joule-heating to create Pt-Ru atomic synergy.
Achieved 1.6 wt % Pt loading and stable performance over 2600 hours.
Evaluated catalyst performance at various current densities.
Hydrogen evolution achieved with an overpotential of 28 mV at 10 mA cm−2.
Catalyst delivered 1 A cm−2 at 1.63 V with a loading of 0.021 mg cm−2.
Long-term stability confirmed, maintaining efficiency over 2600 hours.

Abstract

Anion exchange membrane water electrolysis (AEMWE) offers a pathway to reduce noble-metal usage, yet durable platinum (Pt)-free cathodes remain challenging, making ultralow-Pt catalysts still essential. Here, ultrafast Joule-heating creates nonequilibrium Pt-ruthenium (Ru) atomic synergy at 1.6 wt % Pt loading, enabling efficient hydrogen evolution with an overpotential of 28 mV at 10 mA cm−2. In AEMWE, the catalyst delivers 1 A cm−2 at 1.63 V with a PGM loading of 0.021 mg cm−2 and stable operation for 2600 h. This work provides a cost-efficient strategy for low-Pt cathodes for practical AEMWE.

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