Supported phosphorus-doping rhodium-nickel catalyst as well as preparation method and application thereof

A nickel catalyst and phosphorus doping technology, applied in the field of nanomaterials, can solve the problems of limiting the application of metal nanoparticle catalysts, cumbersome process, and particle aggregation, and achieve good catalytic dehydrogenation effect, simple process, and small particle size.

Inactive Publication Date: 2016-11-16
SUZHOU INSTITUE OF WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, in the preparation of metal nanoparticles, there are usually problems such as particle aggregation or...

Method used

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  • Supported phosphorus-doping rhodium-nickel catalyst as well as preparation method and application thereof
  • Supported phosphorus-doping rhodium-nickel catalyst as well as preparation method and application thereof
  • Supported phosphorus-doping rhodium-nickel catalyst as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) For the preparation of supported phosphorous-doped rhodium-nickel nanoparticles, at room temperature, 10 mg of graphene oxide and 8.8 mg of sodium hypophosphite were sequentially added to an ultrapure aqueous solution, and then ultrasonicated for 10 minutes to dissolve and disperse them. Stir at room temperature.

[0027] 2) Take 0.8 mL of 0.1 mol / L rhodium salt solution and 0.2 mL of 0.1 mol / L nickel salt solution, and add them in sequence to the above aqueous solution and stir.

[0028] 3) Then take 400mg of sodium hydroxide, make it into a 2mol / L aqueous solution, add it into the above solution and stir. Then take 37.8 mg of sodium borohydride, make it into 1 mol / L aqueous solution, slowly add it dropwise to the above solution, and stir continuously at room temperature for 2 hours, it can be observed that the solution slowly turns from orange yellow to black.

[0029] 4) After the reduction reaction is completed, put the aqueous solution containing the metal cata...

Embodiment 2

[0032] 1) For the preparation of supported phosphorous-doped rhodium-nickel nanoparticles, 10 mg graphene oxide and 17.6 mg sodium phosphate were sequentially added to an ultrapure aqueous solution, and then the solution was ultrasonicated for 10 minutes to dissolve and disperse it, and then Stir at room temperature.

[0033] 2) Take 0.8 mL of 0.1 mol / L rhodium salt solution and 0.2 mL of 0.1 mol / L nickel salt solution, and add them in sequence to the above aqueous solution and stir. In order to prepare metal nanoparticles with different rhodium-nickel ratios, the feeding ratios of rhodium salt and nickel salt can be adjusted to 0.6mL / 0.4mL, 0.4mL / 0.6mL and 0.2mL / 0.8mL, respectively.

[0034] 3) Then take 400mg of sodium hydroxide, make it into a 2mol / L aqueous solution, add it into the above solution and stir. Take 37.8 mg of sodium borohydride, make it into 1mol / L aqueous solution, slowly add it dropwise to the above solution, and continue stirring at room temperature for 2...

Embodiment 3

[0038] 1) For the preparation of supported phosphorous-doped rhodium-nickel nanoparticles, 10mg graphene oxide is used as a carrier, then 26.4mg sodium hypophosphite is added to the ultrapure aqueous solution, and the solution is ultrasonicated for 10 minutes to dissolve and disperse , stirred at room temperature. In order to prepare metal nanocatalysts with different phosphorus doping content, the dosage of sodium hypophosphite can be adjusted to 35.2 mg.

[0039]2) Take 0.8 mL of 0.1 mol / L rhodium salt solution and 0.2 mL of 0.1 mol / L nickel salt solution, and add them in sequence to the above aqueous solution and stir.

[0040] 3) Then take 400mg of sodium hydroxide, make it into a 2mol / L aqueous solution, add it into the above solution and stir. Then take 37.8 mg of sodium borohydride, make it into 1 mol / L aqueous solution, slowly add it dropwise to the above solution, and stir continuously at room temperature for 2 hours, it can be observed that the solution slowly turns...

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Abstract

The invention relates to a supported phosphorus-doping rhodium-nickel catalyst as well as a preparation method and an application thereof. According to the method, graphene is taken as a supporter, rhodium salt and nickel salt are taken as raw materials, sodium hypophosphite is taken as phosphoric acid, and the materials are reduced to phosphorus-doping rhodium-nickel metallic nanoparticles through one step by sodium borohydride in an aqueous solution at the room temperature. Conditions are mild, the raw materials are easily available, large-scale industrial production can be realized, and the catalyst is uniform in morphology, small in size and high in catalytic activity and can be used for catalytic dehydrogenation.

Description

technical field [0001] The invention relates to a supported phosphorus-doped rhodium-nickel catalyst and a preparation method and application thereof, belonging to the field of nanometer materials. Background technique [0002] Due to their good catalytic activity and stability, nanomaterials play a pivotal role in the field of energy conversion and storage. The smaller characteristic size of metal nanoparticles compared to bulk materials, and their unique physical and chemical properties make them a promising material. At present, the continuous depletion of fossil energy, and the resulting air pollution and greenhouse gas emissions have attracted more and more attention of researchers, and exploring more environmentally friendly and greener energy has become a research hotspot. Therefore, seeking catalysts with higher efficiency, more stability and simpler synthesis has become the key to the development of green energy. Metal nanoparticles have great advantages in energy...

Claims

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Application Information

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IPC IPC(8): B01J27/185C01B3/04
CPCB01J21/18B01J27/185C01B3/04C01B2203/0277C01B2203/1064C01B2203/1082Y02E60/36
Inventor 罗威杜小琼程功臻
Owner SUZHOU INSTITUE OF WUHAN UNIV
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