A kind of copper-platinum superlattice alloy nanotube and preparation method thereof

An alloy nano and superlattice technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of high cost, hinder the use of methanol fuel cell anode catalysts, and reduce catalytic performance, and achieve fast reaction and product. The effect of high conversion rate and simple conditions

Active Publication Date: 2011-12-14
BEIJING UNIV OF CHEM TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] Platinum is a highly efficient catalyst for methanol oxidation, but when single platinum is used as a catalyst, its catalytic performance is degraded due to its high cost and easy carbon monoxide poisoning during the reaction process, which hinders its use as an anode catalyst for methanol fuel cells.

Method used

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  • A kind of copper-platinum superlattice alloy nanotube and preparation method thereof
  • A kind of copper-platinum superlattice alloy nanotube and preparation method thereof

Examples

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Embodiment 1

[0028] 1) Preparation of copper nanowires: First, add 120-180 g of sodium hydroxide and 4 mL of ethylenediamine into 300 mL of deionized water under mechanical stirring as a pH regulator and a shape control agent, respectively, and then add 15-30 mL of 0.1 mol / L copper nitrate solution as the precursor salt, then add 0.5-2mL hydrazine hydrate as the reducing agent, react in a water bath at 60°C-90°C for 30-60 minutes, and filter the product with deionized water that has been purged with nitrogen to remove oxygen Washed and dried in vacuum to obtain copper nanowires.

[0029] 2) Pretreatment of copper nanowires: first wash the copper nanowires with 0.1mol / L dilute hydrochloric acid to remove oxides and other basic impurities on the surface, then rinse with deionized water that has been deoxidized by nitrogen gas, and finally Put into a vacuum drying oven and dry at 60° C. for 12 hours.

[0030] 3) Preparation of copper nanowire slurry: Weigh 64 mg of pretreated copper nanowire...

Embodiment 2

[0033]1) Preparation of copper nanowires: First, add 120-180 g of sodium hydroxide and 4 mL of ethylenediamine to 300 mL of deionized water under mechanical stirring as a pH regulator and a shape control agent, and then add 15-30 mL of 0.1 mol / L copper nitrate solution as the precursor salt, then add 0.1-2mL hydrazine hydrate as the reducing agent, react in a water bath at 60-90°C for 30-60 minutes, and filter the product with deionized water that has been purged with nitrogen to remove oxygen Washed and dried in vacuum to obtain copper nanowires.

[0034] 2) Pretreatment of copper nanowires: first wash the copper nanowires with 0.1mL / L dilute hydrochloric acid to remove oxides and other basic impurities on the surface, then rinse with deionized water that has been deoxidized by nitrogen gas, and finally Put into a vacuum drying oven and dry at 60° C. for 12 hours.

[0035] 3) Preparation of copper nanowire slurry: Weigh 64 mg of pretreated copper nanowires, add 100 mL of dei...

Embodiment 3

[0038] 1) Preparation of copper nanowires: First, add 120-180 g of sodium hydroxide and 4 mL of ethylenediamine to 300 mL of deionized water under mechanical stirring as a pH regulator and a shape control agent, and then add 15-30 mL of 0.1 mol / L copper nitrate solution as the precursor salt, then add 0.1-2mL hydrazine hydrate as the reducing agent, react in a water bath at 60-90°C for 30-60 minutes, and filter the product with deionized water that has been purged with nitrogen to remove oxygen Washed and dried in vacuum to obtain copper nanowires.

[0039] 2) Pretreatment of copper nanowires: first wash the copper nanowires with 0.1mol / L dilute hydrochloric acid to remove oxides and other basic impurities on the surface, then rinse with deionized water that has been deoxidized by nitrogen gas, and finally Put into a vacuum drying oven and dry at 60° C. for 12 hours.

[0040] 3) Preparation of copper nanowire slurry: Weigh 64 mg of pretreated copper nanowires, add 100 mL of d...

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Abstract

The invention provides a copper-platinum superlattice alloy nano-tube and a preparation method thereof, and belongs to the technical field of alloy nano-tube preparation. The preparation method comprises the following steps: firstly, a sodium hydroxide solution is used as a pH regulating agent, anhydrous ethylenediamine is used as a morphological controlling agent, and a hydrazine hydrate solution is used as a reducing agent to reduce a copper nitrate solution to prepare a copper nano-wire; the copper nano-wire is treated with hydrochloric acid and water respectively and dried, and is dispersed in deionized water, in which nitrogen is introduced to remove oxygen; and a chloroplatinic acid solution is added to ensure the molar ratio of chloroplatinic acid to copper is 1:5 or 1:3, reaction is carried out for 20 to 60 minutes, and then filtering, cleaning and drying are carried out. The prepared copper-platinum superlattice alloy nano-tube has a hollow nano-tube structure with the lengthof between 3 and 5 mu m and an outer diameter of between 80 and 150 nm, and the alloy tube wall consists of alloy cubic particles with the particle diameter less than 20 nanometers. The preparation method has the advantages of simple condition, quick reaction and high product conversion rate.

Description

technical field [0001] The invention belongs to the technical field of alloy nanotube preparation, and in particular relates to a copper-platinum superlattice alloy nanotube with high aspect ratio and a simple and mass-preparable method. Background technique [0002] Alloy nanoparticles with a superlattice structure not only have the properties of alloys, but also exhibit special physical and chemical properties, so they have gradually become a hot spot in the research fields of nanochemistry, energy and environment in recent years. They have broad application prospects in the fields of high-efficiency electrocatalytic materials, magnetic recording materials, antibacterial materials, lubricant materials, light-absorbing materials, sensors, conductive pastes, and new energy electrode materials. At present, superlattice alloy nanoparticles are becoming more and more received people's attention. [0003] As a new type of fuel cell, direct methanol fuel cell has many advantages...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/52C30B29/62C30B7/14B22F9/24B82Y40/00B82Y30/00
Inventor 刘景军王峰徐承宗
Owner BEIJING UNIV OF CHEM TECH
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