Unlock instant, AI-driven research and patent intelligence for your innovation.

Metal nanoparticle catalyst with stable ultrathin carbon layers, and preparation method thereof

A technology of metal nanoparticles and nanoparticles, applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of reducing catalytic performance, affecting material transport, reducing catalyst conductivity etc.

Active Publication Date: 2021-09-03
UNIV OF SCI & TECH OF CHINA
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these mesoporous oxide materials will shield the metal active sites to a certain extent, and will affect the material transport during the reaction process to a certain extent.
For electrochemical catalysts such as fuel cells, the introduction of such low-conductivity oxides will greatly reduce the conductivity of the catalyst, thereby reducing the catalytic performance.

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 catalyst with stable ultrathin carbon layers, and preparation method thereof
  • Metal nanoparticle catalyst with stable ultrathin carbon layers, and preparation method thereof
  • Metal nanoparticle catalyst with stable ultrathin carbon layers, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] The invention provides a metal nanoparticle catalyst and a preparation method thereof with a single-atom modified ultrathin carbon layer stabilization, and a specific example of the preparation method comprises the following steps:

[0030] 1) Provide metal-organic framework materials as precursors;

[0031] 2) Put a certain amount of the metal-organic framework material in step 1) in a metal ion solution with a certain concentration to carry out cation replacement reaction, after a period of time, collect it by centrifugation, and carry out vacuum drying to obtain one or more metals Metal-organic framework modified materials for nodes, usually powder materials;

[0032] 3) Put the powder material obtained in step 2) in the tube furnace again, clean the tube furnace with inert gas for a certain period of time, then seal the tube furnace and perform air extraction to keep the tube furnace There is a certain negative pressure. Then the tube furnace is heated to a high tem...

Embodiment 1

[0048] 1) Preparation of Zn 1 co 1 -MOF: Take dimethylimidazole (1.232g), cobalt nitrate hexahydrate (1.096g) and zinc nitrate hexahydrate (1.116g) in a beaker, in an ice bath, under ultrasonic conditions in an ultrasonic cleaner 10KHz , pour 60mL of methanol solution within 5s. After continuous ultrasonication for 20 min, centrifuge at 12000 rpm, and replace the supernatant with methanol three times. Then place the obtained sample in a vacuum oven at 60°C and take it out after 6 hours to obtain Zn 1 co 1 -MOF.

[0049] 2) Put 30mg of the powder sample obtained in step 1) into 30mL of 0.05M PtCl 4 Carry out cation exchange reaction in methanol solution, the mass fraction of methanol solution is 80%, after 2 minutes, centrifuge and collect with centrifuge, the centrifugation speed is 5000rpm, centrifugation time is 3min. The obtained product is vacuum-dried at 50°C to obtain metal-organic framework modified materials of Pt, Zn and Co nodes;

[0050] 3) Put 30 mg of the pow...

Embodiment 2

[0059] 1) Preparation of ZIF-8: Put dimethylimidazole (3.08g) and zinc nitrate hexahydrate (2.79g) in a beaker, in an ice bath, under ultrasonic condition of ultrasonic cleaner 15KHz, dissolve 150mL methanol solution Pour in 8. After continuous ultrasonication for 30 min, centrifuge at 9000 rpm, and replace the supernatant with methanol three times. Then place the obtained sample in a vacuum drying oven at 65° C. and take it out after 8 hours to obtain ZIF-8.

[0060] 2) Put 50 mg of the powder sample obtained in step 1) into 40 mL of 0.03 M PtCl 4 Carry out cation exchange reaction in methanol solution, the mass fraction of methanol solution is 70%, after 5 minutes, centrifuge to collect with centrifuge, centrifuge speed is 8000rpm, centrifugation time is 5min. The obtained product is vacuum-dried at 70°C to obtain a metal-organic framework modified material of Pt and Zn nodes;

[0061] 3) Put 30 mg of the powder material obtained in step 2) into a tube furnace, and clean ...

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
diameteraaaaaaaaaa
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a metal nanoparticle catalyst with stable ultrathin carbon layers, and a preparation method of the metal nanoparticle catalyst. The catalyst comprises 1-10 graphene ultrathin layers which are highly graphitized and ultra-stable metal nanoparticles which are stabilized by the ultrathin carbon layers and have the diameter of 0.5-20 nm. The catalyst disclosed by the invention has excellent electrochemical activity and stability, and the preparation method disclosed by the invention is easy for mass production, low in preparation cost and easy for industrial production and popularization.

Description

technical field [0001] The invention relates to an ultra-thin carbon layer-stabilized metal nanoparticle catalyst and a preparation method thereof, belonging to the field of preparation of nanometer and subnanometer materials. Specifically, the present invention relates to a single atom modified ultrathin carbon layer stabilized metal nanoparticle catalyst and a preparation method thereof. Background technique [0002] In recent years, researchers have found that confinement of metal NPs in porous oxidic supports (such as porous Al 2 o 3 , CeO 2 , SiO 2 and TiO 2 ), or encapsulating NPs in polymers or oxides with a core-shell or yolk-shell structure [Science2015, 350, 189-192.], can effectively enhance the metal-support interaction and inhibit Particle sintering. For example, Yang et al. wrapped a layer of mesoporous silica on the surface of Pt NPs (Pt@mSiO 2 ), which can effectively avoid the sintering of Pt NPs and greatly enhance the thermal stability of Pt particl...

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
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J23/60B01J27/24B01J27/045B01J23/66B01J23/68B01J35/02
CPCB01J23/8953B01J23/8913B01J23/60B01J27/24B01J27/045B01J23/8906B01J23/892B01J23/66B01J23/685B01J35/50Y02E60/50
Inventor 吴宇恩周煌
Owner UNIV OF SCI & TECH OF CHINA
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com