High-entropy alloy electrocatalysts go to (sub-)nanoscale

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Traditional alloys have limitations in optimizing electronic structures for electrocatalysts.
• High-entropy alloys (HEAs) enable tunable adsorption/desorption energies for reaction intermediates.
• Nanotechnology integration with HEAs shows promise for renewable energy applications.

Purpose of the Study:

• To review recent advancements in rationally designed HEAs for energy electrocatalysis.
• To explain the advantages of HEAs as electrocatalysts (high entropy, nanometer scale, multidimensionality).
• To discuss structural regulation methods for promoting HEA electrocatalysis.

Main Methods:

• Review of thermodynamically nonequilibrium synthesis techniques.
• Analysis of methods for regulating (sub-)nanosize and anisotropic morphologies.
• Discussion of atomic ordering engineering in HEAs.

Main Results:

• HEAs overcome limitations of traditional alloys in tuning electronic structures.
• Nanostructured and multidimensional HEAs demonstrate significant progress in energy electrocatalysis.
• Structural regulation methods enhance the electrocatalytic performance of HEAs.

Conclusions:

• Rational design and structural engineering of HEAs are crucial for advanced electrocatalysis.
• Further research into HEA-based nanocatalysts is needed to address remaining challenges.
• HEAs represent a promising platform for next-generation renewable energy technologies.