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Updated: Jun 16, 2026

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

Acid-Resistant High-Entropy Alloy Electrocatalysts: Unlocking Durable Oxygen Reduction Reaction and Oxygen Evolution

Daman Khan¹, Hammad Abbas¹, Fatima Nasim¹

¹Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan.

|June 15, 2026

Summary

High entropy alloys (HEAs) show promise as durable, cost-effective electrocatalysts for sustainable energy technologies like proton exchange membrane water electrolysis (PEMWE) and fuel cells (PEMFCs). Their unique properties overcome limitations in acidic environments, advancing clean energy solutions.

Keywords:

acid stable electrocatalyst high entropy alloys oxygen evolution reactions oxygen reduction reactions

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Area of Science:

Materials Science
Electrochemistry
Sustainable Energy

Background:

Growing global energy demands and environmental concerns necessitate sustainable energy solutions.
Proton exchange membrane water electrolysis (PEMWE) and fuel cells (PEMFCs) are key technologies for clean energy conversion.
Their efficiency is hampered by slow oxygen evolution (OER) and oxygen reduction (ORR) reaction kinetics in acidic media.

Purpose of the Study:

To review the recent advancements in high entropy alloys (HEAs) as electrocatalysts for acidic environments.
To systematically classify HEAs based on their metal composition and analyze their stability mechanisms.
To outline challenges and future directions for developing acid-stable HEA catalysts.

Main Methods:

Literature review of recent progress in HEA catalysts for energy conversion.
Classification of HEAs by metal composition.
Discussion of stability mechanisms in acidic conditions.

Main Results:

High entropy alloys (HEAs) exhibit tunable composition, structural stability, and corrosion resistance, making them suitable for harsh acidic conditions.
HEAs demonstrate high activity and low overpotentials for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR).
These alloys offer a potential alternative to precious metal catalysts, reducing cost and reliance on scarce resources.

Conclusions:

HEAs are promising candidates for next-generation electrocatalysts in proton exchange membrane water electrolysis (PEMWE) and fuel cells (PEMFCs).
Further research is needed for rational design and deployment of acid-stable HEA catalysts.
HEAs can significantly contribute to the advancement of sustainable energy conversion systems.