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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  • Abstract
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  • Claims
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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 oxi

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

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[0018] Example one

[0019] The raw material prepared by the molar ratio of 84.90% Al, 15.00% Cu and 0.10% Au is smelted into a uniform precursor alloy by arc heating to 800°C under vacuum, and then prepared into ingots by ordinary casting method; the alloy ingot is at 0.1MPa The melt is melted in a rapid quenching furnace under protective atmosphere and heated to 800℃, and the thin strip is prepared by the melt rapid quenching method; the thin strip is de-alloyed and corroded in the NaOH aqueous solution with a molar ratio of 10% for 10 hours, without obvious bubbles After that, it was repeatedly washed with deionized water and alcohol, cleaned and placed in a constant temperature drying oven at 40°C for 4 hours, and then roasted in an air atmosphere furnace at 600°C for 1 hour to prepare copper oxide supported gold nanoparticles nanoporous catalysts material. And it still has high structural stability and thermal stability after heat treatment at 600℃. After sintering, the si...

Example Embodiment

[0020] Example two

[0021] The raw material prepared by the molar ratio of 79.70% Al, 20.00% Cu and 0.30% Au is heated to 850°C by arc melting in an argon atmosphere to form a uniform precursor alloy and then prepared into ingots by ordinary casting method; alloy casting The ingot is melted for the second time in a melt rapid quenching furnace under 0.1MPa protective atmosphere and heated to 850℃, and the thin strip is prepared by the melt rapid quenching method; the thin strip is dealloyed and corroded in a 5% NaOH aqueous solution with a molar ratio of 12 hours After there are no obvious bubbles, it is repeatedly washed with deionized water and alcohol. After cleaning, it is 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 particle nanoporous catalytic material. And the obtained nanocomposite material still has high structural stability and thermal stabili...

Example Embodiment

[0022] Example three

[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 with an electric arc in an argon atmosphere of 0.1MPa, and then smelted into a uniform precursor alloy and then prepared into ingots by ordinary casting method; alloy casting The ingot is melted for the second time in a melt rapid quenching furnace with a protective atmosphere of 0.1MPa and heated to 800°C, and a thin strip is prepared by the melt rapid quenching method. The thin strip was dealloyed and corroded in a 1% molar KOH aqueous solution for 6 hours. After there were no obvious bubbles, it was repeatedly washed with deionized water and alcohol. After cleaning, it was placed in a constant temperature drying oven at 40°C and dried for 4 hours. After roasting in an air atmosphere furnace at 750°C for 1 hour, a copper oxide-supported gold nanoparticle nanoporous catalytic material is prepared; the obtained nanoporous copper oxide-supported gold p...

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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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