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Multi-Component Intermetallic Nanocrystals: a Promising Frontier in Advanced Electrocatalysis.

Mingjin Cui1,2, Haijiao Liu1, Bo Xu1

  • 1Institute of Energy Materials Science, University of Shanghai for Science and Technology, Shanghai, 200093, China.

Small (Weinheim an Der Bergstrasse, Germany)
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Structurally ordered multi-component intermetallic (MCI) nanocrystals offer superior performance in electrocatalysis due to their unique structures. This review details their synthesis, properties, and applications, highlighting future research directions.

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electrocatalysismulti‐component intermetallicnanocrystalsorbital hybridizationsynthesis strategies

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrochemistry

Background:

  • Structurally ordered multi-component intermetallic (MCI) nanocrystals are advanced high-entropy materials.
  • They exhibit exceptional activity and durability in energy-related electrocatalytic applications.
  • Their properties stem from ordered superlattice structures and high-entropy effects.

Purpose of the Study:

  • To comprehensively review MCI nanocrystals, analyzing their structural characteristics and ordering transformations.
  • To discuss various synthesis strategies and their associated advantages and limitations.
  • To analyze electronic structure and its role in enhancing electrocatalytic performance.

Main Methods:

  • Systematic analysis of structural characteristics and ordering thermodynamics/kinetics.
  • Discussion of synthesis strategies: thermal annealing, Joule heating, and wet chemical methods.
  • Analysis of electronic structure, orbital hybridization, and d-band center shifts.

Main Results:

  • MCI nanocrystals possess attractive functional properties for electrocatalysis.
  • Optimized electronic structures and d-band center shifts enhance catalytic activity.
  • Various synthesis routes offer different advantages for constructing MCI nanocrystals.

Conclusions:

  • MCI nanocrystals represent a promising class of materials for electrocatalysis.
  • Further systematic study is needed to fully understand and exploit their potential.
  • Significant challenges remain in their synthesis and application.