Preparation method and application of platinum-loaded ferriferrous oxide catalyst

A technology of ferroferric oxide and catalysts, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of low activity of catalytic CO oxidation and the amount of precious metals Large demand, complex preparation process and other problems, to achieve good catalytic CO oxidation activity and stability, not harsh reaction conditions, and good application prospects

Inactive Publication Date: 2015-08-19
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the physical purification method currently has the following deficiencies: (1) the purification efficiency is affected by factors such as concentration, reaction atmosphere, temperature, etc., especially for low-concentration CO adsorption and purification efficiency is low; (2) generally more adsorption materials are required, and regular Regeneration or replacement of adsorption materials requires many operations and high cost; (3) easy to cause secondary pollution
However, most of the catalysts combined by noble metals and metal oxides require a large amount of noble metals, their preparation process is relatively complicated, and their activity for catalytic CO oxidation is not high.

Method used

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  • Preparation method and application of platinum-loaded ferriferrous oxide catalyst
  • Preparation method and application of platinum-loaded ferriferrous oxide catalyst
  • Preparation method and application of platinum-loaded ferriferrous oxide catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Example 1 (see figure 1 )

[0050] A preparation method of a platinum-supported catalyst comprising ferric iron tetroxide, comprising the following steps:

[0051] (1) Preparation of metal salt solution I

[0052] Add 2.78g of ferrous sulfate solid (analytical pure produced by Sinopharm Reagent Co., Ltd., quality purity ≥ 99%) in 10ml of deionized water, stir at room temperature for 10min, and dissolve to obtain ferrous sulfate solution.

[0053] (2) Preparation of metal salt solution II

[0054] Add 2.4 g of potassium hydroxide (analytical pure produced by Sinopharm Reagent Co., Ltd., quality purity ≥ 99%) to 150 ml of deionized water, and stir at 90 °C for at least 10 min to obtain a potassium hydroxide solution.

[0055] (3) Preparation of mixed solution

[0056] Add the potassium hydroxide solution obtained in step (2) into the ferrous sulfate solution obtained in step (1) until the ferrous sulfate solution is completely precipitated, and continue stirring at ...

Embodiment 2

[0064] A preparation method of a platinum-supported catalyst comprising ferric iron tetroxide, comprising the following steps:

[0065] (1) Preparation of metal salt solution I

[0066] Add 2.78g of ferrous sulfate solid (analytical pure produced by Sinopharm Reagent Co., Ltd., quality purity ≥ 99%) in 10ml of deionized water, continue to add 3ml of chloroplatinic acid solution with a concentration of 10g / L, stir at room temperature for 10min, and get ferrous sulfate solution.

[0067] (2) Prepare metal salt solution II (same as Example 1).

[0068] Add 2.4 g of potassium hydroxide (analytical pure produced by Sinopharm Reagent Co., Ltd., mass purity ≥ 99%) to the solution obtained in 150 ml of deionized water, and stir at 90 °C for at least 10 min to obtain a potassium hydroxide solution.

[0069] (3) Preparation of mixed solution

[0070] Add the potassium hydroxide solution obtained in step (2) into the ferrous sulfate solution obtained in step (1), until the ferrous sul...

Embodiment 3

[0078] A preparation method of a platinum-supported catalyst of ferric iron tetroxide, the basic steps of which are the same as in Example 2. Embodiment 3 is different in that:

[0079] (1) Add 1.3g of ferrous chloride (analytical pure produced by Sinopharm Reagent Co., Ltd., quality purity ≥ 99%) in 10ml of deionized water, continue to add 9ml of sodium chloroplatinate solution with a concentration of 10g / L, and stir at room temperature for 10min , after dissolving, ferrous chloride and platinum salt solution are obtained.

[0080] Added in step (2) is sodium hydroxide;

[0081] A platinum catalyst supported by ferric iron tetroxide with a loading of 2.5wt% was obtained.

[0082] The catalyst of ferric iron tetroxide supported platinum prepared in embodiment 3 is detected by X-ray powder diffractometer:

[0083] X-ray diffraction (XRD) pattern (see figure 2 The results in c) show that the ferric iron tetroxide-supported platinum catalyst prepared in Example 3 has good cr...

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Abstract

The invention discloses a preparation method and application of a platinum-loaded ferriferrous oxide catalyst. The preparation method comprises the following steps: (1) preparing a metal salt solution I; (2) preparing a metal salt solution II; (3) preparing a mixed solution II; (4) preparing a platinum-loaded ferriferrous oxide solid; and (5) preparing the platinum-loaded ferriferrous oxide catalyst. According to the invention, the platinum-loaded ferriferrous oxide catalyst is prepared by using a coprecipitation method, and the preparation method has the advantages of simplicity, easy control, small time consumption in synthesis, low requirements on equipment, mild reaction conditions and good operationality; since transition metal is used as a carrier, production cost is reduced and industrial production can be easily realized; and the platinum-loaded ferriferrous oxide catalyst prepared in the invention has a small amount of platinum, a high specific surface and good CO oxidation catalytic activity and stability at room temperature and is applicable to CO oxidation at normal temperature.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation and application, in particular to a method for preparing a platinum catalyst supported by ferric oxide by a co-precipitation method and the application of the platinum catalyst supported by ferric oxide in normal temperature CO catalytic oxidation. Background technique [0002] The harmful substances of air pollution are mainly carbon monoxide, sulfur dioxide, nitrogen oxides, hydrocarbons and dust. The harmful gas of carbon monoxide mainly comes from automobile exhaust and incomplete combustion of fossil fuels. The catalytic oxidation technology is one of the environmental protection technologies widely used in the fields of environmental governance, industrial production, energy saving and emission reduction in recent years. It has been used in exhaust gas emission reduction, indoor air purification, gas masks, CO gas sensors, hydrogen proton exchange membrane fuel Batteries (PEMFC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01D53/86B01D53/62
CPCY02A50/20
Inventor 李亮李庚南
Owner EAST CHINA UNIV OF SCI & TECH
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