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Preparation method and application of bimetallic nano-catalyst

A bimetallic nano-catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem that bimetallic nano-catalysts have not yet appeared.

Inactive Publication Date: 2021-07-09
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Judging from the literature reports, the report of using bimetallic nanocatalysts has not yet appeared.

Method used

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  • Preparation method and application of bimetallic nano-catalyst
  • Preparation method and application of bimetallic nano-catalyst
  • Preparation method and application of bimetallic nano-catalyst

Examples

Experimental program
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Embodiment 1

[0044] Step 1: Add 23.28 mg Co(NO 3 ) 2 ·6H 2 O was dissolved in 1mL deionized water, stirred and dissolved, and the Co 2+ aqueous solution;

[0045] Step 2: Add 8.08 mg of ruthenium carbon to 8 mL of deionized water and stir thoroughly;

[0046] Step 3: Take the Co that was stirred evenly in Step 1 2+ Add the ruthenium-carbon dispersion in step 2 after the aqueous solution, and fully magnetically stir until uniform;

[0047] Step 4: Quickly add 1 mL of ammonia borane solution with a concentration of 1.0 mmol / mL to the solution obtained in step 3, and stir for 15-30 min until the reaction is completed;

[0048] Step 5: Wash and centrifuge the precipitate obtained in step 4, then dry the centrifuged precipitate at 60-65°C under vacuum and grind it into powder to prepare the Co-Ru / C nano catalyst.

[0049] figure 1 The HRTEM diagram of the Co-Ru / C nanocatalyst prepared in Example 1 of the present invention, it can be proved from the figure that the catalyst contains cobal...

Embodiment 2

[0054] The Co-Ru / C nanocatalyst prepared according to embodiment 1 is catalytic sodium borohydride (NaBH 4 ) The specific steps of hydrolysis hydrogen production reaction are as follows:

[0055] Step 1: Dissolve 1 mmol sodium borohydride in deionized water to form a 1.0 mmol / mL solution;

[0056] Step 2: Place the Co-Ru / C nanocatalyst prepared in Example 1 in a reactor, add 9 mL of deionized water, seal the reactor and place it in a 303K water bath, and turn on the stirrer to stir;

[0057] Step 3: Use a syringe to draw 1 mL of the sodium borohydride solution prepared in step 1, quickly inject it into the reactor in step 2, start timing at the same time, and record the hydrogen volume at the corresponding time every 30 s.

[0058] Figure 5 The rate diagram for hydrogen production by the hydrolysis of sodium borohydride catalyzed by the Co-Ru / C nanocatalyst prepared in Example 1 of the present invention. It can be seen from the figure that the reaction was completed within...

Embodiment 3

[0060] The Co-Ru / C nanocatalyst prepared according to Example 1 catalyzes sodium borohydride (NaBH 4 ) The specific steps of hydrolysis hydrogen production reaction are as follows:

[0061] In Step 2 of Example 2, seal the reactor and place it in a 303K water bath instead of placing the reactors in a 293K, 313K, and 323K water bath respectively. Other steps are identical with embodiment 2.

[0062] Figure 6 The rate diagram of the Co-Ru / C nanocatalyst prepared in Example 1 of the present invention to catalyze the hydrolysis of sodium borohydride to produce hydrogen under different temperature conditions. It can be seen from the figure that the higher the temperature, the faster the reaction rate. At 323K, the reaction ends within 3 min. According to the hydrogen production rate at four different temperatures, it can be calculated that under the action of Co-Ru / C nanocatalyst, sodium borohydride (NaBH 4 ) The activation energy of hydrolysis hydrogen production reaction is ...

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Abstract

The invention provides a preparation method and application of a bimetallic nano catalyst, wherein the synthesis method comprises the steps: taking commercial ruthenium carbon (Ru / C) and cobalt nitrate hexahydrate (Co(NO3)2.6H2O) as raw materials, fully stirring and mixing the two raw materials in deionized water, then adding a reducing agent ammonia borane (H3N.BH3) solution, fully reacting, and then centrifugally drying to obtain the Co-Ru / C nano catalyst. The preparation method of the catalyst is simple, efficient and stable, the catalyst is an environment-friendly material, the catalyst can be effectively separated and recycled from water through an external magnetic field, the catalyst has excellent catalytic activity through the synergistic effect of cobalt atoms and ruthenium atoms, and in coping with energy crisis and solving environmental pollution, the catalyst can be used as a hydrolysis hydrogen production catalyst of hydrogen sources such as sodium borohydride. The preparation and research of the catalyst are beneficial to further widening the application field of transition metal nanoparticle materials.

Description

technical field [0001] The invention relates to a preparation method and application of a bimetallic nanometer catalyst, belonging to the field of chemical catalysis. Background technique [0002] Despite the fact that fossil fuels remain our society's primary energy provider, concerns about unsustainability are growing. Therefore, it is imperative to develop efficient, low-cost, clean, and diverse energy storage systems. Among the proposed solutions, hydrogen is considered the most promising energy carrier with "great potential for clean, efficient, portable and transport applications". With the development of global industrialization, prominent problems such as large-scale oil exploitation and environmental damage continue to appear. Therefore, environmental pollution and energy crisis have become one of the important factors restricting social development. It is just such a kind of appearance of conventional energy crisis and the development of new secondary energy at t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C01B3/06
CPCB01J23/892B01J23/8913C01B3/06C01B2203/0277Y02E60/36
Inventor 刘湘许富花黄文凯黄煜申佳露但宇坤吴宇航
Owner CHINA THREE GORGES UNIV
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