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Non-Au load type catalyst of room temperature catalytic oxidation carbon monooxide and method of preparing the same

A supported catalyst and catalytic oxidation technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. and other problems, to achieve the effect of reducing operating temperature, high surface energy, and broadening the scope of application

Inactive Publication Date: 2011-06-15
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a non-Au-supported catalyst for catalytic oxidation of carbon monoxide at room temperature and its preparation method. The present invention aims at the problem that the performance of Pt-supported catalysts in catalytic oxidation of CO is very weak at room temperature. CoB is introduced into this type of catalyst. The crystalline alloy can significantly improve the performance of its catalytic oxidation of CO at room temperature, greatly reduce the use temperature of the catalyst, broaden the application range of this type of catalyst, and the preparation method is simple and easy, which is conducive to large-scale promotion

Method used

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Examples

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preparation example Construction

[0012] The preparation steps of the present invention are as follows:

[0013] Step (1): Place the shaped oxide carrier or powder oxide carrier in CoSO 4 Soak in the solution for 1-24 hours, filter out the solution, dry it at 60-120℃, and then dry it in N 2 Roast at 100~300℃ for 1~4 hours in an atmosphere; place the baked product in NaBH containing NaOH 4 In the solution, stir at room temperature for 2-8 hours to fully interact with Co. After washing with deionized water to remove excess ions, it is dried at 60-120°C to obtain an intermediate containing CoB amorphous alloy.

[0014] Among them, CoSO 4 The weight ratio of the solution to the oxide carrier is 1:1~5:1; the CoSO 4 CoSO in solution 4 The content is 0.1~1.0mol / L; the NaBH containing NaOH 4 The weight ratio of the solution to the calcined product is 1:1~5:1; the said NaBH containing NaOH 4 The content of NaOH in the solution is 0.05 to 0.5 mol / L.

[0015] Step (2): Place the intermediate of the CoB amorphous alloy prepared i...

Embodiment 1

[0020] Pt / CoB / TiO 2 Catalyst preparation

[0021] Weigh 10 grams of TiO 2 (Particle size is 50-70 mesh) Put in a beaker, add 20mL CoSO with a concentration of 0.3mol / L 4 Soak the solution overnight, filter the excess solution and dry it at 60℃, and then dry it in N 2 Fired at 200°C for 2 hours in an atmosphere. Place the dried material in 25mL NaBH with a concentration of 0.1mol / L 4 In the solution (in which 0.1 mol / L NaOH is added), stir for 2 hours at room temperature, and then wash with deionized water to remove excess ions and dry at 60°C to prepare the loaded CoB / TiO 2 Intermediate. Soak this intermediate in 20mL HPtCl 4 In the solution (concentration of 0.06mol / L), filter out the excess solution after 2 hours and dry it at 353K, then use 25mL of NaBH 4 The solution (concentration is the same as above) is reduced under stirring for 2 hours, and the excess ions are washed away with deionized water, and then dried at 80°C to prepare the loaded Pt / CoB / TiO 2 catalyst. The conten...

Embodiment 2

[0024] Pt / CoB / SiO 2 Catalyst preparation

[0025] Weigh 10 grams of SiO 2 (The particle size is 50-70 mesh). According to the same method in Example 1, Pt / CoB / SiO 2 catalyst. The content of Pt and CoB in the catalyst is about 1.0 wt% and 2.0 wt%, respectively.

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Abstract

The method provides a non-Au carrier type catalyst for catalytic oxidation of carbon monoxide at room temperature and preparation method thereof. The catalyst is a supported catalyst, which adopts one or more oxides among TiO2, Al2O3,ZrO2, CeO2, SiO2 and Fe2O3 as carriers, Pt nanoparticles as active component and CoB amorphous alloy as auxiliary. The preparation method comprises two steps: preparing the intermediate containing CoB amorphous alloy and preparing the carrier type catalyst containing CoB and Pt. The catalyst is used for substitution for conventional nano Au carrier type catalyst to remove CO at room temperature or Co in the hydrogen-enriched atmosphere in a fuel cell. By introducing the CoB amorphous alloy into the catalyst, the catalytic oxidation performance of carbon monoxide at room temperature of thecatalyst is improved; the application temperature of the catalyst is greatly reduced; and application range of the catalyst is widened. The preparation method is simple and facilitates large-scale popularization.

Description

Technical field [0001] The invention belongs to the field of catalysts for catalytic oxidation of carbon monoxide, and more specifically relates to a non-Au supported catalyst for catalytic oxidation of carbon monoxide at room temperature and a preparation method thereof. Background technique [0002] As a common gaseous pollutant, CO is easily combined with hemoglobin in the human body, and it is not easy to separate, causing hypoxia in the body, causing poisoning, and low temperature CO oxidation in CO 2 The gas purification in the laser, the CO gas detector, the breathing gas purification device, and the reduction and elimination of CO emissions from industrial production to the environment play an important role. Therefore, the catalytic oxidation of low-temperature CO has high practical value. At present, the catalysts for catalytic oxidation of CO are mainly supported catalysts with Au, Pd, Pt, etc. as the main active components. Among them, oxides supported by nano Au part...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J21/02B01D53/86B01D53/62
CPCY02A50/20
Inventor 付贤智杨海燕戴文新刘平王绪绪陈旬丁正新员汝胜
Owner FUZHOU UNIV
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