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Platinum-copper alloy nano particle and preparation method thereof

A platinum-copper alloy and nanoparticle technology, applied in nanotechnology and other directions, can solve the problems affecting the morphology and structure of platinum nanoparticles and catalytic activity, and the removal method and process are cumbersome. Effect

Inactive Publication Date: 2016-04-13
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The removal method and process are cumbersome and may affect the morphology and catalytic activity of platinum nanoparticles

Method used

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  • Platinum-copper alloy nano particle and preparation method thereof
  • Platinum-copper alloy nano particle and preparation method thereof
  • Platinum-copper alloy nano particle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A preparation method of platinum-copper alloy nanoparticles, comprising the steps of:

[0048] (1) Potassium tetrachloroplatinate (K) of preparation 10mmol / L 2 PtCl 4 ) solution, 1mol / L copper sulfate (CuSO4 ) solution and the L-ascorbic acid solution of 0.1mol / L;

[0049] (2) Add the magnetic rotor, 4.5mL ultrapure water, the 0.3mL potassium tetrachloroplatinate solution and 1 μL copper sulfate solution prepared above into a 10 ml glass vial in sequence, and stir for 10 minutes to make the solution mix evenly, and obtain Mixed aqueous solution;

[0050] (3) Quickly add 0.2mL of the L-ascorbic acid solution prepared above into the mixed aqueous solution, heat in a water bath to 60°C, and stir vigorously for 2 hours;

[0051] (4) after completion of the reaction, after the gained solution was centrifuged with 12000rpm rotating speed for 10min, the supernatant was removed to obtain a solid product, and in the gained solid product, water and ethanol mixed solution (wate...

Embodiment 2

[0055] A preparation method of platinum-copper alloy nanoparticles, comprising the steps of:

[0056] (1) Potassium tetrachloroplatinate (K) of preparation 10mmol / L 2 PtCl 4 ) solution, 1mol / L copper sulfate (CuSO 4 ) solution and the L-ascorbic acid solution of 0.1mol / L;

[0057] (2) Add the magnetic rotor, 4.0mL ultrapure water, the 0.6mL potassium tetrachloroplatinate solution and 1 μL copper sulfate solution prepared above into a 10 ml glass vial in sequence, and stir for 10 minutes to make the solution mix evenly, to obtain Mixed aqueous solution;

[0058] (3) Add 0.4 mL of L-ascorbic acid prepared above to the mixed aqueous solution quickly, and heat to 60° C. in a water bath, and stir vigorously for 2 hours;

[0059] (4) after completion of the reaction, after the gained solution was centrifuged with 12000rpm rotating speed for 10min, the supernatant was removed to obtain a solid product, and in the gained solid product, water and ethanol mixed solution (water: etha...

Embodiment 3

[0062] A preparation method of platinum-copper alloy nanoparticles, comprising the steps of:

[0063] (1) Potassium tetrachloroplatinate (K) of preparation 10mmol / L 2 PtCl 4 ) solution, 1mol / L copper sulfate (CuSO 4 ) solution and the L-ascorbic acid solution of 0.1mol / L;

[0064] (2) Add the magnetic rotor, 4.5mL ultrapure water, the 0.3mL potassium tetrachloroplatinate solution and 3 μL copper sulfate solution prepared above into a 10 ml glass vial in turn, and stir for 10 minutes to make the solution mix evenly, and obtain Mixed aqueous solution;

[0065] (3) Quickly add 0.2mL of L-ascorbic acid prepared above into the mixed aqueous solution, heat in a water bath to 60°C, and stir vigorously for 2 hours;

[0066] (4) after completion of the reaction, after the gained solution was centrifuged with 12000rpm rotating speed for 10min, the supernatant was removed to obtain a solid product, and in the gained solid product, water and ethanol mixed solution (water: ethanol volu...

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Abstract

The embodiment of the invention provides a preparation method for a platinum-copper alloy nano particle. The preparation method comprises the following steps: (1) preparing a mixed aqueous solution containing chloroplatinate and a soluble copper salt; and (2) adding a reducing agent into the mixed aqueous solution, and carrying out stirring reaction for 1-3 hours in a water bath of 60-90 DEG C; after the reaction is completed, centrifuging a solution obtained by reaction, removing liquid supernatant to obtain a solid product, and washing the solid product, thereby obtaining the platinum-copper alloy nano particle. The preparation method does not need to use a surfactant, is simple in process, gentle in reaction condition, relatively short in reaction time and low in cost; and the obtained platinum-copper alloy nano particle is clean in surface, very uniform in dimension size, good in monodispersity and high in catalytic activity. The embodiment of the invention further provides the platinum-copper alloy nano particle prepared by the preparation method.

Description

technical field [0001] The invention relates to the field of noble metal catalysts, in particular to a platinum-copper alloy nano particle and a preparation method thereof. Background technique [0002] The cathode and anode reactions of fuel cells usually require expensive noble metal platinum as a catalyst to promote the direct and efficient conversion of chemical energy in small organic molecules such as hydrogen or methanol into electrical energy. However, due to the high price of precious metal platinum, the commercialization of fuel cells is extremely slow. How to improve the catalytic performance of nanoparticles, improve the utilization efficiency of noble metals, and reduce the amount of them has always been a major key issue in the field of electrocatalysis. During this study, it was found that the shape, size, and surface structure of noble metal nanoparticles have an important impact on their catalytic performance, especially high-index faceted platinum nanopart...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
CPCB22F9/24B82Y40/00
Inventor 蔡林涛康申东高冠慧谢晓滨
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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