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CuPd metal nano catalyst, and preparation and applications thereof

A metal nano-catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high prices, low earth reserves, etc., and achieve synthesis costs The effect of low, mild conditions and simple procedures

Inactive Publication Date: 2017-06-20
INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pt / C is often used as a commercial catalyst because of its high catalytic activity for the oxygen reduction reaction, but its low earth reserves and high price limit its large-scale application.

Method used

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  • CuPd metal nano catalyst, and preparation and applications thereof
  • CuPd metal nano catalyst, and preparation and applications thereof
  • CuPd metal nano catalyst, and preparation and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of preparation method of CuPd metal nano-catalyst proposed by the present invention, under normal temperature, sodium tetrachloropalladate, cuprous chloride, polyvinylpyrrolidone and glucose are added in the mixed solution of decylamine and nitrogen-nitrogen dimethylformamide Stir until dissolved, then hydrothermally react, cool to room temperature, wash, and vacuum dry to obtain CuPd metal nano-catalyst.

[0039] A kind of preparation method of CuPd / C metal nano-catalyst that the present invention proposes, above-mentioned CuPd metal nano-catalyst is added in dehydrated alcohol ultrasonic dispersion obtains solution A; carbon black is added in dehydrated alcohol ultrasonic dispersion obtains solution B; Stir continuously at room temperature, add solution A dropwise to solution B during the stirring process, then wash and dry to obtain CuPd / C metal nano-catalyst.

Embodiment 2

[0041] A kind of preparation method of CuPd metal nano-catalyst proposed by the present invention, under normal temperature, sodium tetrachloropalladate, cuprous chloride, polyvinylpyrrolidone and glucose are added in the mixed solution of decylamine and nitrogen-nitrogen dimethylformamide Stir until dissolved, the weight ratio of sodium tetrachloropalladate, cuprous chloride, polyvinylpyrrolidone and glucose is 7.8:4:280:260, the volume ratio of decylamine and nitrogen-nitrogen dimethylformamide is 80:5200 , the mass volume ratio (mg / μL) of glucose and decylamine is 240:120, followed by hydrothermal reaction, the temperature of hydrothermal reaction is 68 ℃, the time of hydrothermal reaction is 2.5h, cooled to room temperature, will be cooled to room temperature Centrifugal separation of the material, the rotational speed of centrifugal separation is 12000 rpm, the time of centrifugal separation is 12min, the product obtained by centrifugation is ultrasonically washed with a p...

Embodiment 3

[0044] A kind of preparation method of CuPd metal nano-catalyst proposed by the present invention, under normal temperature, sodium tetrachloropalladate, cuprous chloride, polyvinylpyrrolidone and glucose are added in the mixed solution of decylamine and nitrogen-nitrogen dimethylformamide Stir until dissolved, the weight ratio of sodium tetrachloropalladate, cuprous chloride, polyvinylpyrrolidone and glucose is 9.8:2:320:240, the volume ratio of decylamine and nitrogen-nitrogen dimethylformamide is 120:4800 , the mass volume ratio (mg / μL) of glucose and decylamine is 260:80, followed by hydrothermal reaction, the temperature of hydrothermal reaction is 72 ℃, the time of hydrothermal reaction is 2h, cooled to room temperature, the The material is centrifuged, the speed of centrifugation is 13000 rpm, and the time of centrifugation is 10 minutes. The product obtained by centrifugation is ultrasonically washed with a polar solvent, and then centrifuged. The separation time is 10...

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Abstract

The invention discloses a CuPd metal nano catalyst of a four-feet structure, and a preparation method of the CuPd metal nano catalyst, and also discloses a CuPd / C metal nano catalyst, a preparation method of the CuPd / C metal nano catalyst, and applications of the CuPd / C metal nano catalyst in fuel battery cathodic oxygen reduction. According to the CuPd / C metal nano catalyst, the surface of carbon black is loaded with the CuPd metal nano catalyst. According to the CuPd metal nano catalyst of a four-feet structure, electrons on copper atoms are transferred onto palladium atoms, and the electrons are gathered on the tips of the four-feet structure, so that electron density of tip palladium atoms is increased further, d band center of palladium atoms is reduced, the strong adsorption between palladium atoms and oxygen is reduced, and catalytic activity is increased.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a CuPd metal nanocatalyst and a preparation method thereof, a CuPd / C metal nanocatalyst and a preparation method and application thereof Background technique [0002] With the rapid development of economy and society, the demand for energy is increasing day by day. The reserves of traditional fossil energy on the earth are getting less and less, and the consumption of fossil energy often brings harmful by-products such as carbon dioxide, which seriously affects the ecological environment of the earth. Finding clean and sustainable energy has become the key to urgently solving environmental problems. As a high-efficiency energy conversion device, proton membrane exchange fuel cells are not only environmentally friendly, but also have low operating temperature, fast start-up, and simple structure. Therefore, such devices have attracted more and more attention. The core of the f...

Claims

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Application Information

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IPC IPC(8): B01J23/89H01M4/92B82Y30/00
CPCH01M4/921H01M4/926B82Y30/00B01J23/8926B01J35/50B01J35/40Y02E60/50
Inventor 黄瑞杰张岚曾杰
Owner INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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