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
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires expensive instruments and equipment, the preparation process is

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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
Comparison scheme
Effect test

Example Embodiment

[0062] Example 1

[0063] The main raw material used in this example-polymer nanoparticles: polymethylmethacrylate-b-poly(4-vinylpyridine) (PMMA) 2250 -b-P4VP 286 , The subscript indicates the degree of polymerization, Mw / Mn=1.13) was purchased from Polymer Source. It is made by intramolecular cross-linking by adding bromopropyne into DMF solvent. The average particle size is 12 nm.

[0064] The preparation process of the metal nanoparticle / carbon foam composite material in this embodiment is specifically as follows: The polymer nanoparticle raw material (monomolecular chain head-to-tail structure, tail is linear PMMA polymer, and the head is cross-linked) with an average particle diameter of 12 nm P4VP polymer, where P4VP stands for poly-4-vinylpyridine), soluble in a mixed system of divinylbenzene and acrylonitrile. 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 the condition of...

Example Embodiment

[0068] Example 2

[0069] The preparation process of the metal nanoparticle / carbon foam 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 in divinylbenzene in a volume ratio : Acrylonitrile = 1:9 mixed oil phase, stir until the solution is transparent. An aqueous solution of chloropalladate metal precursor with a mass fraction of 0.005% was prepared. Under the condition of stirring at 1000 rpm, 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%. The initiator AIBN with a mass fraction of 1.5% relative to the oil phase is added to initiate polymerization of the oil phase at 60° C. to form a polymeric foam material. Put the obtained polymeric foam material in a tetrahydrofuran solvent, add 1 ml of hyd...

Example Embodiment

[0072] Example 3

[0073] The preparation process of the metal nanoparticle / carbon foam composite material in this embodiment is as follows: Weigh 0.22% of the single-chain polymer nanoparticle PMMA-b-P4VP relative to the mass fraction of the oil phase, and dissolve in divinylbenzene in a volume ratio : Acrylonitrile = 9:1 mixed oil phase, stir until the solution is transparent. An aqueous solution of chloropalladate metal precursor with a mass fraction of 0.005% was prepared. Under the condition of stirring at 1000 rpm, 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%. The initiator AIBN with a mass fraction of 1.5% relative to the oil phase is added to initiate polymerization of the oil phase at 60° C. to form a polymeric foam material. Put the obtained polymeric foam material in a tetrahydrofuran solvent, add 1 ml of hyd...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Average cell diameteraaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap