Carbon-supported high-entropy alloy nano-catalyst as well as preparation method and application thereof

By preparing carbon-supported high-entropy alloy nanocatalysts, the problem of precious metal dependence and catalyst susceptibility to poisoning in hydroxide fuel cells is solved, and efficient catalytic activity and stability are achieved, which is suitable for high CO tolerance applications.

CN120261605APending Publication Date: 2025-07-04XIAMEN UNIV
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Patent Information

Application Number
CN202510438234.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-09
Publication Date
2025-07-04

AI Technical Summary

Technical Problem

In the existing hydroxide fuel cell technology, the dependence of precious metal platinum leads to high costs, catalysts are prone to poisoning, and the hydroxide reaction rate of anion exchange membrane fuel cell is low, making it difficult to meet the demand for high power density, and the impurities in hydrogen are harmful to the catalyst.

Method used

A carbon-supported high-entropy alloy nanocatalyst is used, which contains five metal elements, among which the atomic ratio of precious metal to non-precious metal is 1:1-3:1, and the average particle size is less than 2nm. It is prepared by heat treatment to form uniformly dispersed nanoparticles, which improve catalytic activity and anti-CO toxicity properties.

Benefits of technology

It significantly improves the activity and stability of the catalyst, reduces the amount of precious metals, improves the efficiency of the hydroxide reaction, and resists CO impurities. It is suitable for hydroxide fuel cells and electrolytic water.

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Abstract

The invention belongs to the technical field of hydrogen-oxygen fuel cell catalysts, and particularly discloses a carbon-supported high-entropy alloy nano-catalyst as well as a preparation method and application thereof. A high-entropy alloy in the carbon-supported high-entropy alloy nano-catalyst at least comprises five metal elements, at least one metal element is precious metal, the atomic ratio of the precious metal to non-precious metal is 1: 1-3: 1, the precious metal is selected from at least one of Pt, Ir and Ru, the non-precious metal is selected from at least one of Fe, Zn and Cu, and the mass fraction of the precious metal element is 5-20 wt%. Through high-entropy alloy component design, crystal phase directional regulation and control and superfine nano-structure construction, technical breakthrough is achieved in the aspects of reducing the consumption of precious metal, improving catalytic activity / stability, poison resistance, process cost and the like, and the method is particularly suitable for the fields such as hydrogen-oxygen fuel cells and electrolyzed water which have the strict requirement for CO tolerance.
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