Controlling metastability through annealing of high-entropy nanoalloy electrocatalysts to boost performance towards the oxygen evolution reaction

Physical Chemistry Chemical Physics 2026 Open access

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Authors: Varatharaja Nallathambi, Aneeta Jose Puthussery, Andrea M. Mingers, Robert Stuckert, André Olean‐Oliveira, Sven Reichenberger, Dierk Raabe, Viktor Čolić, Baptiste Gault, Stephan Barcikowski
DOI: 10.1039/d6cp01112h
Cited by: 0

Abstract

electron microscopy reveals crystallization and partitioning of elements upon heating to 600 °C, forming heterostructured nanoparticles with reinforced carbon shells that exhibit a 5- to 7-fold enhancement of the electrocatalytic activity compared to the as-synthesized counterparts for the oxygen evolution reaction. Discernible differences in elemental dissolution profiles under reaction conditions indicate the changes in the surface atom arrangements that influence the electrocatalytic behavior. We demonstrate the strategic utilization of phase metastability in high-entropy nanoalloys through post-synthesis annealing to enhance the electrochemical activity of laser-generated nanoparticles.

Fields of Study & Subjects

High Entropy Alloys Studies Electrocatalysts for Energy Conversion Subcritical and Supercritical Water Processes

Publication details

Journal / source
Physical Chemistry Chemical Physics
Volume
28
Issue
25
Pages
15597–15608
Publication date
1 January 2026
Language
EN