A bifunctional high-entropy nano-alloy electrocatalyst and a preparation method thereof

By preparing Li-doped (Fe1/5Co1/5Ni1/5Cu1/5Zn1/5)1-xLix high-entropy nanoalloy electrocatalysts on porous nickel foam substrates, the problem of high cost of noble metal catalysts was solved, achieving low-cost and high-efficiency bifunctional electrocatalytic performance, which is suitable for large-scale production.

CN116288477BActive Publication Date: 2026-05-29NORTHEASTERN UNIV AT QINHUANGDAO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHEASTERN UNIV AT QINHUANGDAO
Filing Date
2023-02-07
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing precious metal-based catalysts are expensive and scarce, which limits their large-scale application in water electrolysis. Furthermore, the preparation methods of existing high-entropy nano-alloy electrocatalysts are complex and costly, making it difficult to achieve large-scale production and bifunctional catalytic activity.

Method used

A (Fe1/5Co1/5Ni1/5Cu1/5Zn1/5)1-xLix high-entropy nanoalloy electrocatalyst was prepared on a porous nickel foam substrate by constant potential electrodeposition. By adjusting the Li doping amount x to 0.24–0.27, a cubic interlaced nanosheet structure was formed with a loading of 5–8 mg/cm2.

Benefits of technology

It achieves low-cost and high-efficiency bifunctional electrocatalytic activity, with an onset potential of -0.105V for hydrogen evolution reaction, 1.44V for oxygen evolution reaction, and an overpotential of 224mV at a current density of 10mA/cm2, making it suitable for large-scale production.

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Abstract

The application discloses a bifunctional high-entropy nano-alloy electrocatalyst and a preparation method thereof, and belongs to the technical field of new material preparation. 1 / 5 Co 1 / 5 Ni 1 / 5 Cu 1 / 5 Zn 1 / 5 ) 1‑x Li x (x=0.24-0.27) high-entropy nano-alloy, according to the ion molar ratio Fe 3+ : Co 2+ : Ni 2+ : Cu 2+ : Zn 2+ : Li + =1:1:1:1:1:(1.6-1.8); the preparation method comprises the following steps: 1) preparing a precursor electrolyte according to the ion molar ratio; 2) performing constant potential electrodeposition on a porous nickel foam substrate in a three-electrode system; and 3) washing and naturally drying. The preparation method of the bifunctional high-entropy nano-alloy electrocatalyst is simple to operate and does not need subsequent treatment steps, and the bifunctional high-entropy nano-alloy electrocatalyst has excellent bifunctional electrocatalytic activity of hydrogen evolution reaction and oxygen evolution reaction, and can be directly used for electrocatalytic reaction after preparation.
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