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Metal nanoparticle-foamy carbon catalyst, and preparation method and application thereof

A technology of metal nanoparticles and foamed carbon, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the cumbersome preparation process, difficult structure control, and high price and other problems, to achieve the effect of simple process, low equipment requirements and large specific surface area

Inactive Publication Date: 2015-11-04
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires expensive instruments and equipment, the preparation process is cumbersome, the process is relatively complicated, and the structure is not easy to control.

Method used

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  • Metal nanoparticle-foamy carbon catalyst, and preparation method and application thereof
  • Metal nanoparticle-foamy carbon catalyst, and preparation method and application thereof
  • Metal nanoparticle-foamy carbon catalyst, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0063] The main raw material used in this example-polymer nanoparticles: polymethylmethacrylate-b-poly(4-vinylpyridine) (PMMA 2250 -b-P4VP 286 , subscript indicates degree of polymerization, Mw / Mn=1.13) purchased from Polymer Source Company. Add propyne bromide in DMF solvent and obtain it through intramolecular cross-linking. The average particle size is 12 nanometers.

[0064] The preparation process of the metal nanoparticle / foamed carbon composite material of the present embodiment is specifically as follows: the polymer nanoparticle raw material (single molecular chain head-tail structure, the tail is a linear PMMA polymer, and the head is a cross-linked polymer) with an average particle diameter of 12nm P4VP polymer, wherein P4VP represents poly-4-vinylpyridine), is soluble in divinylbenzene and acrylonitrile mixed system. The volume ratio of divinylbenzene:acrylonitrile is 9:1, and the mass fraction of polymer nanoparticles relative to the oil phase is 0.16%. Under ...

Embodiment 2

[0069]The preparation process of the metal nanoparticle / foamed carbon composite material in this embodiment is as follows: Weigh the single-chain polymer nanoparticle PMMA-b-P4VP with a mass fraction of 0.16% relative to the oil phase, and dissolve it in a volume ratio of divinylbenzene : acrylonitrile=1:9 mixed oil phase, stirred until the solution is transparent. Prepare an aqueous solution of metal chloropalladate precursor with a mass fraction of 0.005%. Under the condition of stirring at 1000rpm, the aqueous solution containing the metal chloropalladate precursor was slowly added dropwise to the oil phase to form a high internal phase Pickering emulsion with an internal phase volume fraction of 75%. Add 1.5% initiator AIBN relative to the mass fraction of the oil phase to initiate the polymerization of the oil phase at 60° C. to form a polymeric foam material. Put the obtained polymeric foam material in tetrahydrofuran solvent, add 1 ml of hydrazine hydrate, and react at...

Embodiment 3

[0073] The preparation process of the metal nanoparticle / foamed carbon composite material in this embodiment is as follows: Weigh the single-chain polymer nanoparticle PMMA-b-P4VP with a mass fraction of 0.22% relative to the oil phase, and dissolve it in a volume ratio of divinylbenzene : acrylonitrile=9:1 mixed oil phase, stir until the solution is transparent. Prepare an aqueous solution of metal chloropalladate precursor with a mass fraction of 0.005%. Under the condition of stirring at 1000rpm, the aqueous solution containing the metal chloropalladate precursor was slowly added dropwise to the oil phase to form a high internal phase Pickering emulsion with an internal phase volume fraction of 75%. Add 1.5% initiator AIBN relative to the mass fraction of the oil phase to initiate the polymerization of the oil phase at 60° C. to form a polymeric foam material. Put the obtained polymeric foam material into a tetrahydrofuran solvent, add 1 ml of hydrazine hydrate, and react ...

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Abstract

The invention discloses a preparation method and an electrochemical catalysis application of a metal nanoparticle-foamy carbon catalyst. The preparation method comprises the following steps: (1) a polymerizable vinyl monomer is adopted as an oil phase, a metal precursor-containing water solution is adopted as a water phase, functional polymer nanoparticles are adopted as an emulsifier, and a stable high-internal-phase Pickering emulsion is prepared; (2) the oil phase is polymerized and the internal phase is removed with a radical polymerization method, such that a polymerized high-internal-phase foam material is obtained; (3) the metal ion precursor in the polymerized high-internal-phase foam is reduced into metal nanoparticles, such that a metal nanoparticle-polymer form hybrid material is obtained; (4) high-temperature calcination is further carried out under a nitrogen atmosphere, such that a metal nanoparticle-foamy carbon hybrid material is obtained; and (5) the above material is loaded on a clean glassy carbon electrode, and electrochemical catalytic application can be carried out. The metal nanoparticle-foamy carbon catalyst preparation method has the advantages of simple process and low equipment requirement. The obtained material has good conductivity and large specific surface area. The material has a good catalytic effect in the aspect of electrochemistry.

Description

technical field [0001] The invention relates to a metal nanoparticle-foamed carbon catalyst and a preparation method and application thereof, belonging to the field of preparation and application of high-performance carbon hybrid materials, in particular to the preparation and electrochemical catalysis application of a metal nanoparticle-foamed carbon catalyst. Background technique [0002] Carbon foam is a lightweight carbon-fixing material with carbon atoms as the skeleton and a porous network structure formed by the accumulation of carbon atoms. Due to its large specific surface area, high porosity and low thermal expansion coefficient, carbon foam has broad application prospects in the fields of battery electrodes, electrochemical capacitors, thermal control materials, and catalyst carriers. [0003] At present, the preparation methods of foamed carbon include foaming method, sol-gel method, Pocofoam method, template method and inverted phase method. These methods have ...

Claims

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Application Information

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IPC IPC(8): B01J23/755H01M4/88H01M4/90B82Y30/00B82Y40/00
CPCY02E60/50
Inventor 高勇易方圆杨端光黎华明
Owner XIANGTAN UNIV
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