Related Experiment Video
Updated: Jan 6, 2026
09:02
Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
Published on: April 27, 2018
8.2K
High-Entropy Alloy Nano-Aggregates Enable Durable and High-Efficiency Oxygen Reduction Reaction
Jiahui Chen1, Zenan Wu1, Guoqiang Cao2
1School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou, China.
Chempluschem
|November 20, 2025
Summary
High-entropy alloys (HEAs) show great promise as electrocatalysts. This study developed PtRhPdIrRu HEA nanoaggregates with superior oxygen reduction reaction (ORR) activity and stability in acidic and alkaline conditions.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- High-entropy alloys (HEAs) possess unique properties beneficial for catalysis.
- Electrocatalysts are crucial for energy conversion technologies like fuel cells.
- Oxygen reduction reaction (ORR) is a key process in many electrochemical applications.
Purpose of the Study:
- To synthesize PtRhPdIrRu HEA nanoaggregates.
- To evaluate their electrocatalytic activity and stability for the ORR.
- To compare their performance against commercial catalysts.
Main Methods:
- Synthesis of HEA nanoaggregates via controlled zeta potential.
- Electrochemical characterization of ORR activity in acidic and alkaline media.
- Long-term stability testing through cyclic voltammetry.
Main Results:
- The synthesized HEA nanoaggregates exhibited excellent ORR activity, surpassing commercial Pt/C.
- Exceptional stability was observed, with high half-wave potentials retained after extensive cycling.
- Performance was superior in both acidic (0.851 V after 13,000 cycles) and alkaline (0.864 V after 30,000 cycles) electrolytes.
Conclusions:
- PtRhPdIrRu HEA nanoaggregates are highly effective ORR electrocatalysts.
- Their superior activity and durability make them promising for next-generation energy devices.
- Controlled synthesis is key to unlocking the potential of HEAs in electrocatalysis.
