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Preparation method of nano palladium oxide catalyst

A palladium oxide and nano-palladium technology, which is applied in the field of preparation of nano-palladium oxide catalysts, can solve the problems of affecting the use effect, large scale, uncontrollable shape, etc., and achieve consistent size, controllable shape, high specific surface energy and The effect of catalytic ability

Active Publication Date: 2013-11-06
HUNAN JIANTE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is simple and easy to operate, its shape is uncontrollable, the scale is large, and the agglomeration seriously affects its use effect
[0006] In terms of the preparation of nano-palladium oxide, Mr. Huang Tao from South-Central University for Nationalities conducted useful explorations, using palladium chloric acid as the source of palladium, PVP as a stabilizer, and microwave irradiation According to the preparation of nano-level palladium oxide, the palladium oxide prepared by this method is easy to combine with the PVP in the reaction solution. At the same time, because the chemical properties of PVP are stable, it is difficult to remove it by chemical methods. Generally, high-speed centrifugation is used for repeated separation. , which limits the scope of application of nano-palladium oxide to a certain extent

Method used

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Effect test

Embodiment 1

[0020] This embodiment includes the following steps:

[0021] (1) Preparation of nano-palladium array and alumina composite structure: use a silicon wafer as a substrate, and magnetron sputtering a 50nm copper layer on the silicon wafer substrate, and then cover the copper layer with a porous alumina template as a cathode, using The metal platinum sheet is used as the anode and placed in the container; ammonia water, 0.03mol / L PdNO 3 and 0.09 mol / L potassium sodium tartrate as electrodeposition solution, ， Adjust the amount of ammonia water so that the pH of the electrodeposition solution is 8.0, the electrodeposition temperature is 30°C, and the deposition current density is 2.5 A / dm 2 And the deposition time is 3.5 minutes; after the electrodeposition is completed, take out the silicon wafer substrate with the nano-palladium array and alumina composite structure from the container, and then remove the silicon wafer substrate to obtain the nano-palladium array and alumina co...

Embodiment 2

[0025] (1) Preparation of nano-palladium array and alumina composite structure: use a silicon wafer as a substrate, and magnetron sputtering a 50nm copper layer on the silicon wafer substrate, and then cover the copper layer with a porous alumina template as a cathode, using The metal platinum sheet is used as the anode and placed in a beaker; ammonia water, 0.03mol / L PdNO 3 , 0.09 mol / L potassium sodium tartrate was used as the electrodeposition solution, the pH of the electrodeposition solution was adjusted to 7.0 by adjusting the amount of ammonia water, the electrodeposition temperature was 30°C, and the deposition current density was 2.5 A / dm 2 And the deposition time is 1 min; after the electrodeposition is completed, take out the silicon wafer substrate with the nano-palladium array and alumina composite structure from the beaker, and then remove the silicon wafer substrate to obtain the nano-palladium array and alumina composite structure;

[0026] (2) Extraction of na...

Embodiment 3

[0029] This implementation includes the following steps:

[0030] (1) Preparation of nano-palladium array and alumina composite structure: use a silicon wafer as a substrate, and magnetron sputtering a 150nm copper layer on the silicon wafer substrate, and then cover the copper layer with a porous alumina template as a cathode, using The metal platinum sheet was used as the anode and put into a beaker; ammonia water, 0.02 mol / L palladium chloric acid and 0.01 mol / L potassium sodium tartrate were used as the electrodeposition solution, and the amount of ammonia water was adjusted so that the pH value of the electrodeposition solution was 9.0, and the electrodeposition temperature at 60°C, the deposition current density is 5A / dm 2 And the deposition time is 9 minutes; after the electrodeposition is completed, take out the silicon wafer substrate with the nano-palladium array and alumina composite structure from the beaker, and then remove the silicon wafer substrate to obtain th...

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Abstract

A preparation method of nano palladium oxide catalyst comprises following steps: (1) preparing a nano palladium array and an alumina composite structure; (2) extracting the nano palladium array; (3) subjecting the nano palladium array to a heat treatment to obtain a nano palladium oxide array. The operation of the preparation method is simple. The pH value is adjusted through controlling the ammonia liquor concentration in the electro-deposition solution. The electro-deposition current density, the electro-deposition time, and the temperature and time during the heat treatment process are controlled to prepare a nano-grade palladium oxide array, which has a relatively high specific surface energy and catalyzing ability. The morphology of the nano palladium oxide is controllable, the size of the nano palladium oxide is the same, the application range is wide, and the nano palladium oxide is especially suitable for applications of tailing gas purifying technology in the automobile industry.

Description

technical field [0001] The invention relates to the field of noble metal oxide catalysts, in particular to a method for preparing a nano-palladium oxide catalyst. Background technique [0002] Noble metal oxide catalysts have irreplaceable catalytic performance and selectivity, so they play an extremely important role in petroleum, chemical, pharmaceutical, pesticide, energy and other fields. [0003] In recent years, with the rapid development of the national economy, the comprehensive construction of the expressway network, and the great improvement of living standards, cars have gradually integrated into people's daily lives. While bringing convenience to the society, they have also brought a series of social problems. For example, the emission of automobile exhaust seriously pollutes the environment, restricts the development of the national economy to a certain extent, and endangers the health of the people, becoming an important factor affecting social stability and h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44
Inventor 姚小刚刘颖温术来
Owner HUNAN JIANTE TECH CO LTD
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