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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, 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 the use temperature, the preparation method is simple and easy, and conducive to large-scale promotion

Inactive Publication Date: 2008-08-27
FUZHOU UNIV
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  • Abstract
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  • 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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preparation example Construction

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

[0013] Step (1): Put the shaped oxide support or powder oxide support on CoSO 4 Immerse in the solution for 1-24 hours, filter the solution and dry it at 60-120°C, and then put it under N 2 Roast at 100-300°C for 1-4 hours under atmosphere; place the roasted product in NaBH containing NaOH 4 The solution is stirred at room temperature for 2 to 8 hours to fully interact with Co, and after being washed with deionized water to remove excess ions, it is dried at 60 to 120° C. to obtain an intermediate of CoB-containing amorphous alloy.

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

[0015] Step (2): The intermediate o...

Embodiment 1

[0020] Pt / CoB / TiO 2 Catalyst preparation

[0021] Weigh 10 grams of TiO 2 (particle size is 50-70 mesh) placed in a beaker, add 20mL of CoSO with a concentration of 0.3mol / L 4 solution, soaked overnight, filtered off the excess solution and dried at 60°C, then in N 2 Baking at 200°C for 2 hours under atmosphere. Place the dried product in 25 mL of NaBH with a concentration of 0.1 mol / L 4 solution (in which 0.1mol / L NaOH was added), stirred at room temperature for 2 hours, and then washed with deionized water to remove excess ions and dried at 60°C to obtain a loaded CoB / TiO 2 intermediate. Immerse this intermediate in 20 mL HPtCl 4 solution (concentration is 0.06mol / L), after 2 hours, filter off the excess solution and dry it at 353K, and then use 25mL of NaBH 4 The solution (with the same concentration as above) was reduced under stirring for 2 hours, washed with deionized water to remove excess ions, and then dried at 80°C to prepare the loaded Pt / CoB / TiO 2 catalyst....

Embodiment 2

[0024] Pt / CoB / SiO 2 Catalyst preparation

[0025] Weigh 10 g of SiO 2 (particle size is 50-70 mesh), according to the same method in embodiment 1, makes Pt / CoB / SiO 2 catalyst. The contents of Pt and CoB in the catalyst are 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 adopts one or more oxides among TiO2, Al2O3,ZrO2, CeO2, SiO2 and Fe2O3 as carriers, Pt nanoparticles as active components 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 the catalyst 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 major 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-loaded catalyst for catalytic oxidation of carbon monoxide at room temperature and a preparation method thereof. Background technique [0002] As a common gas pollutant, CO is easy to combine with hemoglobin in the human body, and it is not easy to separate, causing the body to lack oxygen and causing poisoning, and low-temperature CO is oxidized in CO 2 Gas purification in lasers, CO gas detectors, gas purification devices for breathing, and the reduction and elimination of CO emissions from industrial production to the environment play an important role, so 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 particles, su...

Claims

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Application Information

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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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