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Gold-copper-boron porous network structure electrocatalyst and production method thereof

A network structure and electrocatalyst technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve problems such as time-consuming and complicated methods, and achieve outstanding results Activity and stability, simple preparation method, performance-enhancing effect

Inactive Publication Date: 2020-02-18
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The synthesis methods of porous synthetic materials usually include replacement reaction, dealloying method and template method. These methods are complicated and time-consuming. At the same time, there are relatively few reports on doping boron into metal materials. Therefore, a simple boron doping method is developed. Heteroporous alloy catalysts are important for electrochemical synthesis of ammonia

Method used

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  • Gold-copper-boron porous network structure electrocatalyst and production method thereof
  • Gold-copper-boron porous network structure electrocatalyst and production method thereof
  • Gold-copper-boron porous network structure electrocatalyst and production method thereof

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Embodiment 1

[0052] A kind of preparation method of gold-copper-boron porous network structure electrocatalyst, described method comprises the steps:

[0053] 1) Prepare copper chloride and chloroauric acid N,N-dimethylformamide solutions with a concentration of 20mM respectively;

[0054] 2) Mix 2mL of copper chloride and 2mL of chloroauric acid N,N-dimethylformamide solution, and then add 20mL of 20mM freshly prepared sodium borohydride N,N-dimethylformamide under vigorous stirring at room temperature Amide solution;

[0055] 3) After reacting for 5 minutes, wash, centrifuge, and dry to obtain the gold-copper-boron porous network electrocatalyst.

[0056] The SEM picture of the obtained gold-copper-boron porous network structure can be found in figure 1 . The TEM picture of the obtained gold-copper-boron porous network structure can be found in figure 2 . The XRD pattern of the obtained gold-copper-boron porous network structure can be found in image 3 . The XPS figure of the go...

Embodiment 2

[0059] A kind of preparation method of gold-copper-boron porous network structure electrocatalyst, described method comprises the steps:

[0060] 1) Prepare copper chloride and chloroauric acid N,N-dimethylformamide solutions with a concentration of 1mM respectively;

[0061] 2) Mix 2 mL of copper chloride and 2 mL of chloroauric acid N, N-dimethylformamide solution, and then add 20 mL of freshly prepared sodium borohydride N, N-dimethylformamide with a concentration of 1 mM under vigorous stirring at room temperature. Formamide solution;

[0062] 3) After reacting for 1 min, wash, centrifuge, and dry to obtain the gold-copper-boron nanoparticle electrocatalyst.

[0063] Since the concentration of chloroauric acid and copper chloride is very low in this process, and the reaction temperature is short, it is difficult to centrifuge out of the solution, so it is difficult to synthesize a gold-copper-boron catalyst with a porous network structure. Obtain the SEM figure of gold-c...

Embodiment 3

[0065] A kind of preparation method of gold-copper-boron porous network structure electrocatalyst, described method comprises the steps:

[0066] 1) Prepare copper chloride and chloroauric acid N,N-dimethylformamide solutions with a concentration of 40mM respectively;

[0067] 2) Mix 2mL of copper chloride and 2mL of chloroauric acid N,N-dimethylformamide solution, and then add 20mL of 40mM freshly prepared sodium borohydride N,N-dimethylformamide under vigorous stirring at room temperature Amide solution;

[0068] 3) After reacting for 60 minutes, wash, centrifuge, and dry to obtain the gold-copper-boron nanoparticle electrocatalyst.

[0069] Because in this process, the concentration of chloroauric acid and copper chloride N,N-dimethylformamide is relatively large, and the reaction time increases, which will cause more copper to be reduced, resulting in blocky agglomerates, which are difficult to use Application of electrochemical synthesis of ammonia.

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Abstract

The invention relates to a gold-copper-boron porous network structure electrocatalyst. The gold-copper-boron porous network structure electrocatalyst is produced through a method which comprises the following steps: (1) producing N,N-dimethylformamide solutions, with concentrations of 1-40 mM, of copper chloride and chloroauric acid respectively; (2) taking the N,N-dimethylformamide solutions of the copper chloride and the chloroauric acid respectively according to the total volume of 4 mL for mixing, and then under conditions of room temperature and intense stirring, adding 20 mL of a fresh N,N-dimethylformamide solution, with a concentration of 1-40 mM, of sodium borohydride; and (3) after a reaction is carried out for 1-60 min, conducting washing, centrifugation and drying to obtain thegold-copper-boron porous network structure electrocatalyst. The production method of the gold-copper-boron porous network structure electrocatalyst is further provided. The production method is simple, the reaction time is short, the reaction conditions are mild, and the produced material has excellent performance of electrochemical ammonia synthesis through nitrogen reduction.

Description

[0001] (1) Technical field [0002] The invention relates to an electrocatalyst with a gold-copper-boron porous network structure and a preparation method thereof. The catalyst can be used for research on electrochemically catalyzing nitrogen reduction reactions. [0003] (2) Background technology [0004] Ammonia is the second largest chemical product produced in the world (after sulfuric acid, with more than 200 million tons per year globally and a market value of more than $60 billion). Among them, about 80% of ammonia is used in the production of fertilizers (such as urea, ammonium nitrate, ammonium phosphate, etc.) and other important chemical intermediate products. Therefore, ammonia synthesis technology plays an important role in the development of human society. At present, the industrial synthesis of ammonia mainly relies on the traditional Haber-Bosch method, which uses nitrogen and hydrogen as raw materials and converts them into ammonia under the action of a catalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/10C25B1/00C25B11/06
CPCB01J23/8926C25B1/00C25B11/051C25B11/091B01J35/33B01J35/60
Inventor 王自强牛金花刘化章王亮
Owner ZHEJIANG UNIV OF TECH
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