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Preparation method of AuCu bimetallic electrocatalyst with pentagram structure

An electrocatalyst and alloy catalyst technology, applied in structural parts, circuits, electrical components, etc., can solve the problems of reduced energy efficiency, hydrogen evolution side reactions, catalyst deactivation, etc., and achieve reduced reduction potential, high reaction efficiency, and simple synthesis method. Effect

Inactive Publication Date: 2020-11-24
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesis method is simple, the conditions are mild, and the conversion rate is high, but the high overpotential required will reduce the energy efficiency, and during the reaction, the active sites of the catalyst will be covered by the metal ions generated by electrolysis, resulting in deactivation of the catalyst. The problem needs to be further resolved
[0004] A single noble metal catalyst is expensive and the reduction potential of carbon dioxide is too high to cause serious hydrogen evolution side reactions, which will also make the product single and poor in stability

Method used

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  • Preparation method of AuCu bimetallic electrocatalyst with pentagram structure
  • Preparation method of AuCu bimetallic electrocatalyst with pentagram structure
  • Preparation method of AuCu bimetallic electrocatalyst with pentagram structure

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Dissolve 0.5g of hexadecylamine and 0.9g of glucose in 80mL of distilled water, stir vigorously overnight, add 0.3g of tetrachloroauric acid hydrate and 0.03g of copper chloride, mix well, and react in an oil bath at 100°C for 30 minutes to obtain black Red, uniform and stable solution, after washing several times with absolute ethanol to obtain Au 3 Cu 1 Nano-particles, ultrasonically dispersed in an ethanol solution to obtain a standby solution; add a certain quality of XC-72 carbon black to the standby solution, stir and disperse, and then stand at room temperature. After the supernatant is clear, the supernatant is sucked out The black precipitate deposited to the bottom was dried in a vacuum drying oven at 45°C to obtain an AuCu alloy catalyst supported on carbon black. by figure 1 It can be seen that the Au prepared in this example 3 Cu 1 The diameter of the nanoparticles is between 35-40 nm.

[0022] Take 2 mg of the AuCu alloy catalyst loaded on carbon black prepar...

Embodiment 2

[0024] Dissolve 0.5g of hexadecylamine and 0.9g of glucose in 80mL of distilled water, stir vigorously overnight, add 0.2g of tetrachloroauric acid hydrate and 0.07g of copper chloride, mix well and react in an oil bath at 100℃ for 30 minutes to obtain black Red, uniform and stable solution, after washing several times with absolute ethanol to obtain Au 1 Cu 1 Five-pointed star nanoparticles are ultrasonically dispersed in an ethanol solution to obtain a standby solution; add a certain quality of XC-72 carbon black to the standby solution, stir and disperse, and then stand at room temperature. After the supernatant is clarified, suck up The clear liquid, and the black precipitate that settled to the bottom was dried in a vacuum drying oven at 45°C to obtain an AuCu alloy catalyst supported on carbon black. by figure 1 It can be seen that the Au prepared in this example 1 Cu 1 The pentagonal diameter is between 17-23nm.

[0025] Take 2 mg of the AuCu alloy catalyst loaded on carbo...

Embodiment 3

[0027] Dissolve 0.5g of hexadecylamine and 0.9g of glucose in 80mL of distilled water, stir vigorously overnight, add 0.08g of tetrachloroauric acid hydrate and 0.1g of copper chloride, mix well, and react in an oil bath at 100°C for 30 minutes to obtain black Red, uniform and stable solution, after washing several times with absolute ethanol to obtain Au 1 Cu 3 Nano-branches are ultrasonically dispersed in ethanol solution to obtain a standby solution; add a certain quality of XC-72 carbon black to the standby solution, stir and disperse, and then stand at room temperature. After the supernatant is clear, the supernatant is sucked out The black precipitate deposited to the bottom was dried in a vacuum drying cabinet at 45°C to obtain an AuCu alloy catalyst supported on carbon black. by figure 1 It can be seen that the Au prepared in this example 1 Cu 3 The diameter of the nanobranches is between 7-16 nm.

[0028] Take 2 mg of the AuCu alloy catalyst loaded on carbon black prepar...

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Abstract

The invention discloses a preparation method of an AuCu bimetallic electrocatalyst with a pentagram structure. The preparation method comprises the following steps: dissolving a surfactant and glucosein distilled water, stirring overnight, adding copper chloride and a tetrachloroauric acid hydrate, uniformly mixing, reacting in an oil bath at 100-150 DEG C for 30 minutes to obtain a black red, uniform and stable solution, and washing with absolute ethyl alcohol for multiple times to obtain the AuCu alloy catalyst with the pentagram structure. The synthesized bimetallic electrocatalyst with the pentagram structure is simple in synthesis method, mild in reaction condition, high in reaction efficiency and low in energy consumption. Compared with single metal, the cost can be reduced, the reduction potential is reduced, and the selectivity is improved, thereby improving the electrocatalytic performance of the catalyst.

Description

Technical field [0001] The invention belongs to the technical field of fuel cell catalysts, and in particular relates to a preparation method of AuCu bimetallic electrocatalysts with a five-pointed star structure. Background technique [0002] With the progress of human society, the excessive use of fossil fuels such as petroleum and coal in production and life has led to a gradual increase in the content of carbon dioxide in the atmosphere. Exceeding the standard will cause a series of environmental and climate problems, such as: climate warming, land Acidification etc. Therefore, the conversion of abundant carbon dioxide in the atmosphere into fuel for chemical energy through electrocatalysis has attracted widespread attention. Electrocatalytic carbon dioxide can not only reduce its content and alleviate climate problems, but also has the advantages of controllable selectivity, high conversion efficiency, simple method and easy implementation. [0003] There are two types of ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M4/88
CPCH01M4/9041H01M4/9083H01M4/8825Y02E60/50
Inventor 常方方任梦云杨林白正宇张庆
Owner HENAN NORMAL UNIV
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