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Preparation method for Palladium-copper-tin ternary alloy nano-catalyst and thereof

A nano-catalyst and ternary alloy technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of poor utilization of precious metals, low electrocatalytic activity, etc. Problems, to achieve high-efficiency electrocatalytic activity, simple process, and reduce production costs

Active Publication Date: 2015-07-15
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcomings of low electrocatalytic activity and poor utilization rate of noble metals of single-component catalysts, and provide a kind of catalyst with high electrocatalytic activity, high utilization rate of noble metals, and anti-corrosion that can be applied to the field of direct methanol, ethanol and formic acid fuel cells. Carbon nanotube-supported equiatomic ratio palladium-copper-tin ternary alloy nanocatalyst with good poisoning performance, long service life and suitable for large-scale production and preparation method thereof

Method used

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  • Preparation method for Palladium-copper-tin ternary alloy nano-catalyst and thereof
  • Preparation method for Palladium-copper-tin ternary alloy nano-catalyst and thereof
  • Preparation method for Palladium-copper-tin ternary alloy nano-catalyst and thereof

Examples

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example 1

[0039] A palladium-copper-tin ternary alloy nanocatalyst, the catalyst is a multi-walled carbon nanotube as a carrier, and the supported alloy nanoparticle is an alloy of palladium, copper and tin, and the content of the alloy nanoparticle in the catalyst is about 25wt.%. The content of the nanotube is about 75wt.%, and the atomic ratio of palladium, copper and tin in the alloy nanoparticles is 1:1:1.

[0040] A kind of preparation method of palladium-copper-tin ternary alloy nano-catalyst is as follows:

[0041] The first step, pickling surface functionalization treatment of carbon nanotubes:

[0042] Place an appropriate amount of multi-walled carbon nanotubes with a diameter of 60nm in concentrated nitric acid with a concentration of 60%, magnetically stir and boil for 30min, filter, wash, and dry at 50°C;

[0043] The second step, the preparation of carbon nanotube supported palladium-copper-tin ternary alloy nanocatalyst:

[0044] A, palladium, copper, tin molar ratio i...

example 2

[0051] A palladium-copper-tin ternary alloy nanocatalyst, the catalyst is a multi-walled carbon nanotube as a carrier, and the loaded alloy nanoparticle is an alloy of palladium, copper and tin, and the content of the alloy nanoparticle in the catalyst is about 20wt.%. The content of the nanotube is about 80wt.%, and the atomic ratio of palladium, copper and tin in the alloy nanoparticle is 1:1:1.

[0052] The first step, pickling surface functionalization treatment of carbon nanotubes:

[0053] Place an appropriate amount of multi-walled carbon nanotubes with a diameter of 20nm in concentrated nitric acid with a concentration of 70%, magnetically stir and boil for 30min, filter, wash, and dry at 60°C;

[0054] The second step, the preparation of carbon nanotube supported palladium-copper-tin ternary alloy nanocatalyst:

[0055] A, palladium, copper, tin molar ratio is 1: 1: 1 palladium chloride, cupric sulfate, stannous chloride are added in the ethylene glycol, ultrasonic s...

example 3

[0061] A palladium-copper-tin ternary alloy nanocatalyst, the catalyst is a single-walled carbon nanotube as a carrier, and the supported alloy nanoparticle is an alloy of palladium, copper and tin, and the content of the alloy nanoparticle in the catalyst is about 50wt.%. The content of the nanotube is about 50wt.%, and the atomic ratio of palladium, copper and tin in the alloy nanoparticles is 1:1:1.

[0062] The first step, pickling surface functionalization treatment of carbon nanotubes:

[0063] Place an appropriate amount of single-walled carbon nanotubes with a diameter of 100nm in concentrated nitric acid with a concentration of 40%, magnetically stir and boil for 60min, filter, wash, and dry at 20°C;

[0064] The second step, the preparation of carbon nanotube supported palladium-copper-tin ternary alloy nanocatalyst:

[0065] A. Add palladium chloride, copper sulfate, and stannous chloride with palladium, copper, and tin molar ratios of 1:1:1 into ethylene glycol, a...

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Abstract

The invention discloses a palladium-copper-tin ternary alloy nano-catalyst and a preparation method thereof, which belong to the field of nano-alloy catalysts and fuel cells. The catalyst adopts a carbon nano-tube as a carrier; loaded nano-alloy comprises palladium, copper and tin with the atomic ratio of 1:1:1; the content of ternary alloy loaded nano-particles in the catalyst ranges from 20wt% to 50wt%; and the content of the carbon nano-tube ranges from 50wt% to 80 wt%. The preparation method specifically comprises the steps of pickling surface functionalization treatment on the carbon nano-tube and equal atomic ratio codeposition loading on the palladium, copper and tin. According to the invention, the process of the preparation method is simple, the use amount of noble metals is greatly reduced, and the prepared ternary alloy catalyst with carbon nano-tube load and the equal atomic ratio of the palladium, copper and tin has the advantages of good dispersibility, as well as broad-spectrum and efficient electrochemical catalytic oxidation activity on small molecules of fuels, such as methanol, ethanol and formic acid, commonly used in low-temperature fuel cells.

Description

technical field [0001] The invention relates to a carbon nanotube-supported equiatomic ratio palladium-copper-tin ternary alloy nanocatalyst and a preparation method thereof, which can be used for the electrocatalytic oxidation reaction of organic small molecules (ethanol, methanol, formic acid, etc.) liquid fuels, and in particular to a direct The invention discloses a palladium-copper-tin ternary alloy nano-catalyst with high dispersion and low noble metal content supported by carbon nanotubes for methanol, ethanol and formic acid fuel cells and a preparation method thereof, belonging to the field of nano-alloy catalysts and fuel cells. Background technique [0002] Proton exchange membrane fuel cell is a device that directly converts the chemical energy of fuel into electrical energy. Because of its high energy conversion rate, environmental friendliness, low operating temperature, and long service life, it has broad applications in portable power supplies, electric vehicl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/90B01J23/89
CPCY02E60/50
Inventor 王孝广朱复春柏中朝唐斌
Owner TAIYUAN UNIV OF TECH