Metal oxide modified high-entropy alloy catalyst as well as preparation method and application thereof

By replacing some elements on the Ni2In intermetallic compound and combining it with the LDH synthesis method, a metal oxide-modified high-entropy alloy catalyst with Zr or Ce as a carrier is formed, which solves the problems of low selectivity and poor conversion rate of existing catalysts. Efficient CO2 conversion and methanol yield are achieved.

CN119303586APending Publication Date: 2025-01-14EAST CHINA UNIV OF SCI & TECH +1
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Patent Information

Application Number
CN202411385475.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-09-30
Publication Date
2025-01-14

AI Technical Summary

Technical Problem

The existing CO2 hydrogenation catalysts have low selectivity and poor conversion rates, resulting in waste of energy and low catalytic activity of high entropy intermetallic compound catalysts.

Method used

Based on the Ni2In intermetallic compound parent material, by replacing some Ni and In sites and combining with the LDH synthesis method, an ordered Ni\Ga\Cu\In\Zn\Fe\X\Mg\Al multi-component LDH material is formed. Through further thermal reduction, a metal oxide-modified high-entropy alloy catalyst using X (Zr or Ce), Mg, and Al mixed metal oxides as carriers is formed.

Benefits of technology

It effectively activates CO2 at low temperatures, enhances the adsorption of CO2, significantly improves the conversion rate of CO2 and the single-pass yield of methanol, and improves the utilization efficiency of carbon resources.

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Abstract

The invention discloses a metal oxide modified high-entropy alloy catalyst and a preparation method and application thereof, the metal oxide modified high-entropy alloy catalyst is a supported Ni-Ga-Cu-In-Zn-Fe high-entropy alloy catalyst with a mixed metal oxide of X, Mg and Al as a carrier, the metal X is Zr or Ce, preferably Zr; the catalyst is prepared through a one-step precipitation method, a co-precipitation and impregnation method or a two-step precipitation method by utilizing the characteristic that main body laminate composition and elements of a layered hydroxide (LDHs) material are adjustable; the metal oxide modified high-entropy alloy catalyst has the characteristics of high catalyst metal particle dispersity, high catalytic activity, good selectivity and long service life due to the introduction of ZrO2 or CeO2, and can reach a higher CO2 conversion rate in a relatively low temperature interval, so that the CO2 conversion rate and the single-pass yield of methanol are remarkably improved, and the catalyst has the advantages of low cost and high efficiency. Therefore, the utilization efficiency of carbon resources is improved, and the method has a good industrial application prospect.
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