A catalyst having a core-shell structure, a preparing method and uses of the catalyst

A core-shell structure, catalyst technology, applied in structural parts, nanotechnology for materials and surface science, electrical components, etc., can solve problems such as low catalytic performance, high catalyst cost, and short cycle life

Active Publication Date: 2017-06-30
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
View PDF5 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of high cost, low catalytic performance and short cycle life of catalysts currently used in fuel cell

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
  • A catalyst having a core-shell structure, a preparing method and uses of the catalyst
  • A catalyst having a core-shell structure, a preparing method and uses of the catalyst
  • A catalyst having a core-shell structure, a preparing method and uses of the catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Measure 0.0168g of citric acid into a three-necked flask, add 100ml of deionized water to ultrasonically dissolve, and disperse evenly. Then weigh 0.03g of sodium borohydride and add it to this solution, and feed nitrogen gas, stir mechanically, for 10min, slowly add 100 microliters of 0.4mol / L cobalt chloride solution dropwise to the above solution, stir mechanically, and fully react 10min. Measure 3ml of 10mM sodium chloropalladate, add it quickly, continue to maintain mechanical stirring, fully react for 50min, and then centrifuge and wash to prepare a new type of palladium-cobalt "egg yolk-eggshell" structure catalyst, that is, a core-shell structure catalyst.

[0087] The catalyst was characterized by scanning tunneling microscope (SEM) and transmission electron microscope (TEM). Figure 1A-1B and figure 2 As shown, the prepared novel palladium-cobalt "egg yolk-eggshell" structure catalyst is a hollow porous structure, and contains cobalt nuclei inside, uniforml...

Embodiment 2

[0090] Measure 0.0168g of citric acid into a three-necked flask, add 100ml of deionized water to ultrasonically dissolve, and disperse evenly. Then weigh 0.03g of sodium borohydride and add it to this solution, and feed nitrogen gas, stir mechanically, for 10min, slowly add 100 microliters of 0.4mol / L cobalt chloride solution dropwise to the above solution, stir mechanically, and fully react 10min. Measure 2ml of 10mM sodium chloropalladate, quickly add it, continue to maintain mechanical stirring, fully react for 50min, and then centrifuge and wash to prepare a new type of palladium-cobalt "egg yolk-eggshell" structure catalyst, that is, a core-shell structure catalyst.

[0091] The catalyst was characterized by scanning tunneling microscopy (SEM), and the results were as follows: Figure 4 As shown, the prepared novel palladium-cobalt "egg yolk-eggshell" structure catalyst is a hollow porous structure, and contains cobalt nuclei inside, uniformly dispersed and uniform in si...

Embodiment 3

[0094] Measure 0.0168g of citric acid into a three-necked flask, add 100ml of deionized water to ultrasonically dissolve, and disperse evenly. Then weigh 0.03g of sodium borohydride and add it to this solution, and feed nitrogen gas, stir mechanically, for 10min, slowly add 100 microliters of 0.4mol / L cobalt chloride solution dropwise to the above solution, stir mechanically, and fully react 10min. Measure 4ml of 10mM sodium chloropalladate, add it quickly, continue to maintain mechanical stirring, fully react for 50min, and then centrifuge and wash to prepare a new palladium-cobalt "egg yolk-eggshell" structure catalyst, that is, a core-shell structure catalyst.

[0095] The catalyst was characterized by scanning tunneling microscopy (SEM), and the results were as follows: Figure 6 As shown, the prepared novel palladium-cobalt "egg yolk-eggshell" catalyst has a hollow porous structure, and contains cobalt nuclei inside, which is uniformly dispersed and uniform in size. Aro...

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
Particle sizeaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

A catalyst having a core-shell structure, a preparing method and uses of the catalyst are disclosed. The catalyst has a novel yolk-shell structure and includes a hollow microporous precious metal shell and a transition metal core disposed in a hollow cavity of the shell. The shell is formed by assembling precious metal nanometer particles. By the unique structure, the specific surface of the catalyst is large and the shell and the core are synergistic, thus greatly improving catalytic performance. The preparing method is simple, materials can be effectively saved, the cost is reduced, production steps are simple and environment pollution is low, thus meeting the development trend of the current era.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and relates to a catalyst, its preparation method and application, in particular to a novel core-shell structure catalyst, its preparation method and its application as an electrocatalyst in a fuel cell. Background technique [0002] A fuel cell is a power generating device that directly converts the chemical energy present in fuel and oxidant into electrical energy. Fuel and air are respectively fed into the fuel cell, and then electricity is generated and applied to existing equipment, such as military, space, power plants, and fields such as motor vehicles, mobile devices, and households, which promote the conversion of this fuel cell into The most important part of electric energy is the catalyst, which can make the raw material produce electric energy quickly and efficiently. [0003] In the past few decades, catalysts such as platinum carbon and palladium carbon have been mainly used in ...

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): H01M4/92B82Y30/00
CPCH01M4/921H01M4/925Y02E60/50
Inventor 符显珠盛国庆孙蓉
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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