Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Pt open hollow sphere structure catalyst and preparation method and application thereof

A technology of structural catalysts and hollow spheres, applied in structural parts, electrochemical generators, nanotechnology for materials and surface science, etc., can solve structural collapse, many operation steps, complex template or nanocrystal seed synthesis process, etc. question

Active Publication Date: 2018-05-18
GUANGXI NORMAL UNIV
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although both the template method and the electrochemical displacement method can effectively prepare hollow nanostructures with controllable size, both methods have disadvantages such as many operation steps, complex synthesis process of required templates or nano-seeds, and internal processing The hollow structure of the template and the product is easily damaged during the collection process, resulting in the collapse of the structure
Therefore, it is still a great challenge to explore simple and effective preparation methods of Pt-based hollow structure catalysts.

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
  • Pt open hollow sphere structure catalyst and preparation method and application thereof
  • Pt open hollow sphere structure catalyst and preparation method and application thereof
  • Pt open hollow sphere structure catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0017] refer to figure 1 , a kind of preparation method of Pt open hollow sphere structure catalyst, one-step chemical reduction method prepares Pt open hollow sphere structure catalyst, specifically: add 4.0mg Pt ( acac) 2 , 25mg sodium dodecyl sulfate (SDS) and 30mg polyvinylpyrrolidone (PVP), ultrasonic treatment at room temperature for 10 minutes and magnetic stirring for 5 minutes, then the resulting suspension was stirred and reacted at 110°C-160°C for 0.5 hours-5 hours , after the reaction product is centrifuged and washed, the Pt open hollow sphere structure catalyst can be obtained.

[0018] SEM analysis shows that most of the prepared catalyst particles are spherical structures with a hollow center and external openings, wherein the catalyst yield of the open hollow sphere structure is as high as 90%, and the average particle size is 540nm, which confirms the Pt open hollow sphere structure synthesized in this example. The catalyst has good shape and size uniformit...

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

No PUM Login to View More

Abstract

The invention discloses a preparation method of a Pt open hollow sphere structure catalyst. The method is characterized in that the Pt open hollow sphere structure catalyst is prepared through a one-step chemical reduction method; and the method specifically comprises the steps of adding 4.0mg of Pt (acac)2, 10-80mg of lauryl sodium sulfate (SDS) and polyvinylpyrrolidone (PVP) to a container containing 8mL of a choline chloride / ethylene glycol eutectic solvent (DES) separately; carrying out ultrasonic treatment at room temperature for 10min, magnetically stirring for 5min and then carrying outmixing reaction on the obtained suspension at 110-160 DEG C for 0.5-5h; and centrifuging and washing a reaction product to obtain the Pt open hollow sphere structure catalyst. The method has the advantages of being simple in operation process, few in steps and mild and controllable in conditions, can be successfully synthesized in one step and has a good application prospect; the Pt open hollow sphere structure catalyst prepared through the method has the characteristics of being large in aperture and high in electrochemically active surface area; and the utilization efficiency of a noble metal Pt and the electrocatalytic activity and stability of the noble metal Pt on methanol oxidation can be improved.

Description

technical field [0001] The invention relates to the fields of electrocatalysis and fuel cells, in particular to a Pt open hollow sphere structure catalyst, a preparation method thereof, and an application in direct methanol fuel cells. Background technique [0002] At present, the anode process catalysts of direct methanol fuel cells (DMFCs) are still dominated by Pt-based materials, but Pt resources are scarce, the cost of catalysts is high, and the catalytic process is accompanied by the aggregation of nanoparticles, resulting in a sharp decline in catalytic activity. In addition, most Pt-based catalysts have a solid structure, which is not conducive to the full utilization of the noble metal Pt to a certain extent. Constructing new catalysts with robust structure and high utilization of noble metal Pt is one of the effective ways to solve these problems. In recent years, the shape-controlled synthesis of Pt-based nanocatalysts has attracted much attention. Among the man...

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): H01M4/92H01M8/1011B82Y30/00
CPCB82Y30/00H01M4/928H01M8/1011Y02E60/50
Inventor 樊友军项胜唐华果钟静萍
Owner GUANGXI NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products