Method for preparing gold alloys-containing catalyst

A technology for alloy catalysts and complex metals, applied in metal/metal oxide/metal hydroxide catalysts, molecular sieve catalysts, chemical instruments and methods, etc.

Active Publication Date: 2009-04-22
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] As can be seen from the above background introduction, there is no general method to obtain gold-containing nanoparticles with high dispersion and high thermal stability.

Method used

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  • Method for preparing gold alloys-containing catalyst
  • Method for preparing gold alloys-containing catalyst
  • Method for preparing gold alloys-containing catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1. Measure 200 mL of ethanol with a graduated cylinder into a 500 mL three-necked flask, and then add 10.00 g of 3-aminopropyltriethoxysilane (APTES) to prepare a solution. Accurately weigh 4.00g of SBA-15 powder and add it to the above solution. Place the three-necked flask in a water bath, stir magnetically, and reflux at 80°C for 24 hours. Then, it was filtered, washed with ethanol 3 times, and dried in an oven at 60°C for 6 hours. Get APTES-SBA-15.

Embodiment 2

[0052] Example 2. Measure 200 mL of toluene in a 500 mL three-necked flask with a graduated cylinder, and then add 10.00 g of 3-aminopropyltrimethoxysilane (APTMS) to prepare a solution. Accurately weigh 4.00 g of amorphous silica powder and add it to the above solution. Place the three-necked flask in a water bath, stir magnetically, and reflux at 80°C for 24 hours. Then, it was filtered, washed with toluene 3 times, and dried in an oven at 60°C for 6 hours. Get APTMS-SiO 2 .

Embodiment 3

[0053] Example 3. Measure 200 mL of isooctane in a 500 mL three-necked flask with a graduated cylinder, and then add 10.00 g of 3-mercaptopropyltrimethoxysilane (MPTMS) to prepare a solution. Accurately weigh 4.00g of amorphous nano silicon oxide powder and add it to the above solution. Place the three-necked flask in a water bath, stir magnetically, and reflux at 80°C for 24 hours. Then, it was filtered, washed with isooctane 3 times, and dried in an oven at 60°C for 6 hours. Get MPTMS-nanoSiO 2 .

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Abstract

The invention relates to a method for preparing an auric alloy catalyst with high dispersion, high thermal stability and high activity. Firstly, a group which can complexate metallic ions is grafted on the surface of an oxhydryl-containing carrier; secondly, according to certain percentage, the carrier is dispersed in a solution containing aurum and another or a plurality of metal precursors so that the carrier carries out synchronous or substep complexation on the metallic ions; through certain steps of filtering and washing, the carrier complexated with the metallic ions is re-dispersed in a solvent with certain amount and is added with a reducing agent with proper amount for deoxidation; and finally, collected solid powder is treated for 0.5 to 6 hours under the atmosphere of hydrogen gas at a temperature of between 400 and 600 DEG C to obtain the auric alloy catalyst with high dispersion, high thermal stability and high activity. The auric alloy catalyst shows high activity in the oxidation reaction of carbon monoxide and the oxidation reaction of ethanol.

Description

Technical field [0001] The invention relates to the preparation of metal nano particles, in particular to a method for preparing a gold-containing alloy catalyst with high dispersion, high thermal stability and high activity. Background technique [0002] Gold, as a currency metal, is generally considered to be chemically inert. However, since Haruta and others in Japan invented a method for preparing highly dispersed and highly active supported gold catalysts (for example, JP 60238148 and JP 0194945), the catalysis of gold nanoparticles has become a research hotspot in recent years. Nano-gold can catalyze many reactions, such as low-temperature oxidation of carbon monoxide, selective oxidation of alcohols, and propylene epoxidation. A large number of experimental research results have proved that the catalytic performance of nano-gold is closely related to its particle size. Only when the size of the gold particles is less than 5 nanometers can a highly active nano-gold catalyst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03B01J23/48B01J23/52
Inventor 王爱琴刘晓艳卫星张涛
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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