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Preparation method for nickel oxide loaded palladium catalyst and application to room-temperature CO catalytic oxidation

A palladium catalyst, nickel oxide technology, applied in the directions of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve problems such as complicated preparation process, achieve simple preparation method, Strong operability and good application effect

Inactive Publication Date: 2014-09-17
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, most catalysts combining noble metals and transition metal oxides require a relatively large amount of noble metals, and the preparation process is relatively complicated, so the catalytic activity for CO oxidation at low temperatures still needs to be further improved.

Method used

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  • Preparation method for nickel oxide loaded palladium catalyst and application to room-temperature CO catalytic oxidation
  • Preparation method for nickel oxide loaded palladium catalyst and application to room-temperature CO catalytic oxidation
  • Preparation method for nickel oxide loaded palladium catalyst and application to room-temperature CO catalytic oxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A preparation method of nickel oxide supported palladium catalyst, comprising the following steps:

[0054] (1) Add 29.1g nickel nitrate solid (analytical pure produced by Sinopharm Reagent Co., Ltd., mass purity ≥ 99%) in 100ml deionized water, stir at room temperature for 2 hours, and dissolve to obtain nickel nitrate solution.

[0055] (2) Add 13.4g of sodium oxalate (analytical pure produced by Sinopharm Reagent Co., Ltd., quality purity ≥99%) to 200ml of deionized water, and stir at 80°C for at least 2 hours to obtain an oxalate solution.

[0056] (3) Add the oxalate solution obtained in step (2) into the nickel nitrate solution obtained in step (1) until the nickel nitrate is completely precipitated, and continue stirring at 80°C for 15 minutes to obtain a nickel oxalate solid suspension.

[0057] (4) After cooling the nickel oxalate solid suspension obtained in step (3), perform suction filtration and separation, and then wash with deionized water to obtain nicke...

Embodiment 2

[0065] A preparation method of nickel oxide supported palladium catalyst, comprising the following steps:

[0066] The content of step (1) to step (6) is the same as that of embodiment 1.

[0067] (7) Weigh 0.5g of the nickel oxide carrier obtained in step (6) of Example 1, and use 10ml of chloropalladium acid with a concentration of 4.12g / L, 7.65g / L, 10.30g / L, and 13.83g / L respectively Sodium (Na 2 PdCl 4 ) solution for impregnation and stirring for 2 hours to obtain a nickel oxide solid suspension impregnated with sodium chloropalladate.

[0068] (8) Add hydrazine hydrate solutions with a volume of 50ml, 150ml, 250ml, and 350ml and a concentration of 10.2g / L to the nickel oxide impregnated with sodium chloropalladate obtained in step (7) slowly (at a speed of 1ml / min). In the solid suspension, stirring for 24 hours, the sodium chloropalladate was reduced to elemental palladium to obtain a solid suspension of palladium supported on nickel oxide.

[0069] (9) centrifuging ...

Embodiment 3

[0076] A preparation method of nickel oxide supported palladium catalyst, comprising the following steps:

[0077] In step (1) to step (6), the nickel salt is nickel chloride and its hydrate, and the oxalate is potassium oxalate;

[0078] Step (6): The single-phase nickel oxalate precursor solid obtained in step (5) is placed in a muffle furnace and heated from room temperature to 300°C at a heating rate of 20°C / min. The rest of the content is the same as in Example 1 .

[0079] The content of step (7) to step (9) is the same as that of embodiment 2.

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Abstract

The invention provides a preparation method for a nickel oxide loaded palladium catalyst. The preparation method comprises the following steps: (1) preparing nickel nitrate solution; (2) preparing an oxalate solution; (3) dissolving the nickel nitrate solution and the oxalate solution to prepare a nickel oxalate solid suspension solution; (4) preparing nickel oxalate solid; (5) carrying out drying treatment; (6) preparing a nickel oxide carrier with a mesoporous structure; (7) preparing a solid suspension solution of nickel oxide impregnated palladium salt; (8) preparing a solid suspension solution of nickel oxide loaded palladium monomer; and (9) carrying out the drying treatment to obtain a target product, namely the nickel oxide loaded palladium catalyst. The nickel oxide loaded palladium catalyst prepared by the preparation method has little palladium, has a large specific surface, has good catalytic CO oxidative activity and stability at room temperature, and can be applied to room temperature carbon monoxide oxidization. The preparation method provided by the invention is simple, and little in consumed time of a synthesis process; reaction conditions are not rigorous and the requirements on equipment are not high; transition metal is used as a carrier so that the cost of a production process is low and the industrial production is easy to realize.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a method for preparing a nickel oxide-supported palladium catalyst by an impregnation method and the application of the prepared nickel oxide-supported palladium catalyst in the catalytic oxidation of carbon monoxide (CO) at room temperature. Background technique [0002] CO catalytic oxidation technology is widely used in industrial production, environmental governance and other fields in recent years. It has been applied to indoor air purification, gas masks, CO gas sensors, exhaust gas emission reduction, CO 2 Laser, hydrogen proton exchange membrane fuel cell (PEMFC) and automobile exhaust purification devices and other fields and products. At present, people are still conducting in-depth research on this technology to find more application fields or directions. [0003] In 1987, Haruta et al. (M. Haruta, et al, Gold catalysts prepared by coprecipitation for low...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01D53/86B01D53/62
CPCY02A50/20
Inventor 李亮李庚南施剑林
Owner EAST CHINA UNIV OF SCI & TECH
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