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Overcoming the Catalytic Bucket Effect in Pt-based High-Entropy Nanocages Through Interface Defect and Strain

Qian Liu¹, Haoran Kang¹, Yiou Liu¹

¹Tianjin Key Laboratory of Multiplexed Identification For Port Hazardous Chemicals, State Key Laboratory of Bio-based Fiber Materials, Tianjin University of Science & Technology, Tianjin, P. R. China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|July 8, 2026

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This summary is machine-generated.

We developed novel platinum-palladium-nickel-copper-manganese-gold high-entropy nanocages (HENCs) for enhanced electrocatalysis. These HENCs show remarkable activity and stability for oxygen reduction reactions, boosting fuel cell performance.

Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

High-entropy alloys (HEAs) offer unique properties due to multi-elemental composition.
Developing efficient and stable electrocatalysts is crucial for fuel cell technology.
Nanostructured materials provide high surface areas for catalytic applications.

Purpose of the Study:

To fabricate and characterize novel platinum-palladium-nickel-copper-manganese-gold high-entropy nanocages (PtPdNiCuMnAu HENCs).
To investigate the synergistic effects of multi-component composition and nanostructure on electrocatalytic performance.
To evaluate the potential of PtPdNiCuMnAu HENCs in membrane electrode assemblies for fuel cells.

Main Methods:

Facile liquid-phase reduction followed by acid etching for HENC fabrication.

Keywords:

Pt‐based high‐entropy nanocages catalytic bucket effect defect fuel cells oxygen reduction catalysts strain engineering

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Electrochemical characterization including half-wave potential and mass activity measurements.

Accelerated durability testing and membrane electrode assembly performance evaluation.

Main Results:

PtPdNiCuMnAu HENCs exhibited a half-wave potential of 0.925 V vs. RHE and a mass activity of 1.70 A/mgPt.
The catalyst demonstrated exceptional stability with minimal degradation after 10,000 cycles.
Membrane electrode assemblies achieved a peak power density of 381.6 ± 3.10 mW/cm².

Conclusions:

The synergistic effects in PtPdNiCuMnAu HENCs significantly enhance electrocatalytic activity and stability.
These HENCs represent a promising catalyst for advanced fuel cell applications.
The fabrication method offers a scalable route to high-performance nanocage catalysts.