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Preparation method of nano porous copper oxide loaded precious metal catalytic material

A technology of nanoporous and catalytic materials, which is applied in the field of preparation of nanoporous catalytic materials, can solve the problems such as the inability to realize the loading of precious metal particles, and achieve the effects of high nanoporous structure stability, high catalytic performance and consumption saving.

Inactive Publication Date: 2015-05-20
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this process, it is difficult for the noble metal to form a weak acid salt, so that the noble metal remains nano-sized and deposited on the surface of the porous copper oxide. Therefore, the current wet chemical method for preparing porous copper oxide cannot realize the loading of noble metal particles on the surface of the porous copper oxide.

Method used

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  • Preparation method of nano porous copper oxide loaded precious metal catalytic material
  • Preparation method of nano porous copper oxide loaded precious metal catalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The raw material prepared by the molar ratio of 84.90% Al, 15.00% Cu and 0.10% Au is heated to 800°C by electric arc under vacuum to melt into a uniform precursor alloy and then prepared into ingot by ordinary casting method; the alloy ingot is cast at 0.1MPa Secondary melting and heating to 800°C in a melt quenching furnace under protective atmosphere conditions, and thin strips were prepared by melt quenching; the thin strips were dealloyed and corroded in a 10% NaOH aqueous solution for 10 hours, and there were no obvious bubbles Afterwards, it was washed repeatedly with deionized water and alcohol. After cleaning, it was placed in a constant temperature drying oven at 40°C for 4 hours, and then baked in an air atmosphere furnace at 600°C for 1 hour to prepare copper oxide-loaded nano-gold particles. Material. And it still has high structural stability and thermal stability after heat treatment at 600°C. After sintering, the size of the copper oxide is between 20-50...

Embodiment 2

[0021] Raw materials prepared with a molar ratio of 79.70% Al, 20.00% Cu and 0.30% Au are heated to 850°C by arc melting under an argon protective atmosphere to melt into a uniform precursor alloy and then prepared into ingots by ordinary casting; alloy casting The ingot was melted twice in a melt quenching furnace with a protective atmosphere of 0.1MPa and heated to 850°C, and a thin strip was prepared by the melt quenching method; the thin strip was dealloyed and corroded in a 5% NaOH aqueous solution for 12 hours , after there are no obvious bubbles, wash it repeatedly with deionized water and alcohol, dry it in a constant temperature drying oven at 40°C for 4 hours; then bake it in an air atmosphere furnace at 600°C for 1 hour to prepare copper oxide-loaded nanoparticles. Gold particle nanoporous catalytic material. And the obtained nanocomposite still has high structural stability and thermal stability after heat treatment at 750°C. The microstructure of the nanoporous c...

Embodiment 3

[0023] The raw material prepared by the molar ratio of 84.00% Al, 15.00% Cu and 1.00% Au is heated to 800°C by electric arc under 0.1MPa argon atmosphere and melted to form a uniform precursor alloy, and then prepared into ingot by ordinary casting method; alloy casting The ingot is melted twice in a melt quenching furnace with a protective atmosphere of 0.1MPa and heated to 800°C, and thin strips are prepared by the melt quenching method. The thin strip was dealloyed and corroded in 1% KOH aqueous solution for 6 hours. After there were no obvious bubbles, it was washed repeatedly with deionized water and alcohol. After roasting in an air atmosphere furnace at 750°C for 1 hour, the nanoporous catalytic material of copper oxide-loaded gold nanoparticles was prepared; compared with porous copper oxide, the catalytic material of nano-porous copper oxide-loaded gold particles had significantly enhanced CO catalytic oxidation performance, And it still has high structural stability ...

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Abstract

The invention relates to a preparation method of a nano porous copper oxide loaded precious metal catalytic material. The method comprises the steps of preparing ternary precursor alloy by adopting aluminum, copper and precious metal in a smelting way, preparing an alloy ribbon by adopting the alloy in a rapid melt quenching manner, carrying out alloy removal corrosion on the alloy ribbon in a 1% to 20% alkaline solution for 6 to 13 hours, then washing the alloy ribbon by utilizing deionized water and alcohol, drying the cleaned alloy ribbon in a constant-temperature drying box for 4 hours at the temperature of 40 DEG C so as to obtain a nano porous copper oxide loaded precious metal particle compound system, and then burning the system for 1 hour at the temperature of 300 to 900 DEG C to obtain the block-shaped nano porous oxide copper loaded nano precious metal particle catalytic material. The catalytic oxidation performance of the prepared precious metal nano particle loaded oxide copper catalytic material CO is obviously higher than that of the nano porous copper, and the structure stability and the heat stability are still relatively high after the material is thermally treated at the temperature of 750 DEG C.

Description

technical field [0001] The invention relates to a preparation method of a nanoporous catalytic material, in particular to a preparation method of a nanoporous copper oxide-loaded noble metal catalytic material. Background technique [0002] When noble metals (silver, gold, palladium, platinum) are prepared into nanomaterials, they will exhibit high chemical catalytic activity, especially when noble metal nanoparticles are supported on catalytically active carriers such as copper oxide to form nanocomposites, because both The strong interfacial interaction of catalytic materials can reflect higher catalytic activity. The traditional preparation method of composite nanomaterials composed of noble metal nanoparticles and copper oxide generally adopts complex chemical co-precipitation method, deposition precipitation, impregnation method and ion implantation, etc., and finally obtains nanocomposite powder. However, these traditional processes often require a large amount of org...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J35/10
Inventor 孙占波张小龙宋晓平
Owner XI AN JIAOTONG UNIV
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