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Updated: May 15, 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

Engineering Structurally Ordered High-Entropy Intermetallic Nanoparticles with High-Activity Facets for Oxygen

Guang Feng¹, Fanghua Ning¹, Yue Pan²

¹Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials, School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China.

Journal of the American Chemical Society

|May 10, 2023

Summary

Structurally ordered high-entropy intermetallic (HEI) nanoparticles demonstrate exceptional performance in oxygen reduction reactions (ORR) and fuel cells. These novel catalysts offer ultrahigh activity and durability for advanced energy conversion technologies.

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Last Updated: May 15, 2026

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Published on: December 6, 2021

Area of Science:

Materials Science
Electrochemistry
Nanotechnology
Energy Conversion

Background:

High-entropy solid-solution alloys are of significant interest for energy conversion.
Structurally ordered high-entropy intermetallic (HEI) nanoparticles are underexplored in electrocatalysis.
Development of efficient electrocatalysts is crucial for advancing fuel cell technology.

Purpose of the Study:

To synthesize and characterize structurally ordered HEI nanoparticles (NPs).
To evaluate the electrocatalytic performance of these HEI NPs for oxygen reduction reaction (ORR).
To assess the performance of HEI NPs in H₂/O₂ fuel cells.

Main Methods:

Synthesis of PtIrFeCoCu HEI (PIFCC-HEI) NPs with an average diameter of 6 nm.
Atomic structural characterization using atomic-resolution energy-dispersive spectroscopy (EDS) mapping.
Electrochemical testing for ORR activity and durability, and fuel cell performance evaluation.
Theoretical calculations to understand structure-property relationships.

Main Results:

PIFCC-HEI NPs exhibit an ordered intermetallic structure.
PIFCC-HEI/C achieved ultrahigh ORR mass activity (7.14 A mg_{noble ext{ metals}^-1 at 0.85 V) and extraordinary durability (>60,000 cycles).
Fuel cells using PIFCC-HEI/C as cathode showed ultrahigh peak power density (1.73 W cm^-2) and stable operation (>80 h).

Conclusions:

Structurally ordered HEI NPs demonstrate top-level performance for ORR and fuel cells.
The superior performance is attributed to ultrahigh-activity facets, particularly the (001) facet, which optimizes ORR kinetics and electronic structure.
This work highlights HEI NPs as promising catalysts for practical fuel cells and energy applications.