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Universal liquid-phase preparation method of noble metal-based intermetallic compound

A technology of noble metals and base metals, which is applied in the field of liquid-phase preparation of noble metal-based intermetallic compound electrocatalysts, to achieve the effects of improved stability, good electrocatalytic activity, and simple preparation process

Inactive Publication Date: 2020-10-30
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the above-mentioned difficulties and deficiencies, and to provide a general liquid-phase preparation method of precious metal-based intermetallic compounds

Method used

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  • Universal liquid-phase preparation method of noble metal-based intermetallic compound
  • Universal liquid-phase preparation method of noble metal-based intermetallic compound
  • Universal liquid-phase preparation method of noble metal-based intermetallic compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) 0.06mmol PdBr 2 , 0.02mmol BiBr 3 , 2.5mL of 1-octadecene, 0.25mL of oleylamine and 0.25mL of oleic acid were put into a single-necked bottle.

[0039] (2) Put the one-mouth bottle in an oil bath, heat it up to 170°C at a rate of 5°C / min, and then keep it warm for 30 minutes; take out the one-mouth bottle, cool it to room temperature, wash it by centrifugation three times, and disperse it in toluene to obtain Pd 3 Pb intermetallic nanoblocks.

Embodiment 2

[0041] (1) 0.05mmol PtBr 2 , 0.05mmol BiBr 3 , 0.35mmol ascorbic acid, 2mL 1-octadecene and 1mL oleylamine were put into a single-necked bottle.

[0042] (2) Put the one-mouth bottle into an oil bath, heat it up to 200°C at a rate of 5°C / min, and then keep it warm for 60 minutes; take out the one-mouth bottle and cool it to room temperature, then centrifuge and wash it three times, and disperse it in toluene to obtain PtBi intermetallic compound nanoparticles plate.

Embodiment 3

[0044] (1) 0.045mmol PtBr 2 , 0.035mmol BiBr 3 , 2.5mL of 1-octadecene, 0.25mL of oleylamine and 0.25mL of oleic acid were put into a single-necked bottle, heated to 90°C to fully dissolve, and after cooling to room temperature, 0.17mmol of ascorbic acid was added.

[0045] (2) Put the one-mouth bottle in an oil bath at 220°C and keep it warm for 15 minutes; take out the one-mouth bottle and cool it to room temperature, wash it by centrifugation three times, disperse it in toluene, and obtain Pd 2.5 Pb1.5 Intermetallic Nanoparticles.

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Abstract

The invention discloses a universal liquid-phase preparation method of a noble metal-based intermetallic compound. The noble metal-based intermetallic compound is composed of a precious metal and a non-precious metal, the precious metal comprises platinum and palladium, and the non-precious metal comprises bismuth and lead. The preparation method comprises the following steps: mixing a metal halide as a precursor with a reducing agent and a reaction solvent, heating to a certain temperature in an oil bath, keeping the temperature for a period of time, cooling the product, and carrying out centrifugal washing to obtain noble metal-based intermetallic compound nanocrystal with uniform morphology, small particle size and small size distribution range, wherein the metal halide is a key for forming an intermetallic compound. The noble metal-based intermetallic compound prepared by the method not only is simple in preparation method, but also has higher activity and stability in the electro-catalytic reaction of alcohol fuel cells.

Description

technical field [0001] The invention belongs to the field of direct alcohol fuel cells, and relates to a liquid-phase preparation method of a noble metal-based intermetallic compound electrocatalyst used for an anode catalytic reaction. Background technique [0002] Direct alcohol fuel cell is a new energy technology that has attracted extensive attention, and it is the fuel cell closest to commercial application. Noble metal-based electrocatalysts are a class of electrocatalysts widely used in the anodic oxidation reaction of direct alcohol fuel cells. However, due to the high price of precious metals and their relatively short service life, direct alcohol fuel cells cannot be commercially used on a large scale. Therefore, the development of low-cost, high-activity, and high-stability noble metal-based electrocatalysts is the key to solving this problem. [0003] In order to improve the catalytic efficiency of noble metal-based catalysts and reduce the cost of catalysts, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/90H01M12/06
CPCH01M4/9041H01M12/06
Inventor 鲁启鹏韩素梅王安良曹文斌
Owner UNIV OF SCI & TECH BEIJING