A high-entropy alloy catalyst supported on multi-walled carbon nanotubes, its preparation method and application

By loading FeCoNiPtIn high-entropy alloy catalysts onto multi-walled carbon nanotubes, the synergistic effect of In and transition metals was utilized to optimize the electronic structure and interfacial interactions, thus solving the stability and activity problems of Pt-based catalysts and achieving a highly efficient hydrogen evolution reaction through water electrolysis.

CN121737757BActive Publication Date: 2026-05-26SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
Filing Date
2026-02-28
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing Pt-based catalysts suffer from poor long-term stability, easy particle agglomeration and surface oxidation in the hydrogen evolution reaction of water electrolysis, and the high-entropy alloy composition is difficult to control precisely, and the synergistic effect between the support and the active component is insufficient.

Method used

A high-entropy alloy catalyst of FeCoNiPtIn supported by multi-walled carbon nanotubes was developed. By introducing In element, a five-element high-entropy system was constructed to form stable FeCoNiPtIn high-entropy alloy nanoparticles. Combined with hydroxylated multi-walled carbon nanotube support, dp/dd/sp hybridization and atomic shift coupling were achieved, optimizing electronic structure and interfacial interactions.

Benefits of technology

It significantly improves the long-term stability and activity of the catalyst, enabling it to operate stably for more than 5000 hours at a constant current density of 250 mA·cm⁻². It also reduces the 5d band center of Pt, inhibits surface oxidation and particle agglomeration, and optimizes the hydrogen adsorption free energy and interfacial water molecule dissociation kinetics.

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Abstract

The present invention discloses a multi-walled carbon nanotube-supported high-entropy alloy catalyst, its preparation method and application. The high-entropy alloy catalyst consists of a multi-walled carbon nanotube support and high-entropy alloy nanoparticles supported on the surface of the multi-walled carbon nanotube support. The high-entropy alloy nanoparticles are composed of five metal elements, namely Fe, Co, Ni, Pt, and In, to form a thermodynamically stable FeCoNiPtIn high-entropy alloy solid solution phase. The high-entropy alloy nanoparticles are anchored on the surface of the support through chemical bonding and have a delocalized electron structure formed by d-p / d-d / sp hybridization. The catalyst prepared according to the method of the present invention exhibits excellent activity and durability in the hydrogen evolution reaction, can achieve long-term stable operation, and provides a reliable and efficient preparation technology solution with excellent performance for the large-scale industrial promotion of the electrolytic water hydrogen evolution reaction.
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