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

Method for preparing monodisperse core-shell nano catalyst for fuel cell

A core-shell nanotechnology, fuel cell technology, applied in nanotechnology for materials and surface science, battery electrodes, nanotechnology, etc., to ensure the stability of structure and performance, avoid cumbersome operation steps, and facilitate mass production Effect

Active Publication Date: 2019-06-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF9 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports in published patents on methods for effectively preparing monodisperse alloys and core-shell nanoparticles with particle sizes less than 3 nm.

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
  • Method for preparing monodisperse core-shell nano catalyst for fuel cell
  • Method for preparing monodisperse core-shell nano catalyst for fuel cell
  • Method for preparing monodisperse core-shell nano catalyst for fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Add 25mg of sodium borohydride to 20mL of ethylene glycol solution, add 1.2mL of 0.1M cobalt chloride in ethylene glycol solution under vigorous stirring, and stir for 20min.

[0035] 2. Add a mixed solution of 0.4 mL of 0.1 M cobalt chloride and 0.4 mL of 50 mM potassium chloroplatinate dropwise to the above solution, and react for 10 min.

[0036] 3. Add 16mg of XC72 activated carbon to the above solution, stir at 60°C for 6 hours, centrifuge, wash, and dry. The obtained catalyst is denoted as Co 6 @Co 2 Pt 1 / C.

[0037] figure 1 for Co 6 @Co 2 Pt 1 TEM image of / C. figure 2 for Co 6 @Co 2 Pt 1 Size distribution plot of nanoparticles. image 3 for Co 6 @Co 2 Pt 1 Cyclic voltammetry and oxygen reduction polarization curves of / C in rotating disk electrode (RDE) test.

Embodiment 2

[0047] 1. Add 25mg of sodium borohydride into 20mL of ethylene glycol solution, add 1.2mL of 0.1M cobalt chloride in ethylene glycol solution under vigorous stirring, and stir for 30min.

[0048] 2. Add a mixed solution of 0.4mL 0.1M cobalt chloride and 0.4mL 50mM potassium chloroplatinite dropwise to the above solution, and react for 30min.

[0049] 3. Add 16 mg of XC72 activated carbon to the above solution, stir at 90°C for 10 hours, centrifuge, wash, and dry. The obtained catalyst is denoted as Co 6 @Pt 1 / C.

[0050] Figure 6 for Co 6 @Pt 1 TEM image of / C. Figure 7 for Co 6 @Pt 1 Size distribution plot of nanoparticles. Figure 8 for Co 6 @Pt 1 Cyclic voltammetry and oxygen reduction polarization curves of / C in rotating disk electrode (RDE) test.

Embodiment 3

[0052] 1. Add 32mg of sodium borohydride into 20mL of ethylene glycol solution, add 2.0mL of 0.1M cobalt chloride in ethylene glycol solution under vigorous stirring, and stir for 10min.

[0053] 2. Add a mixed solution of 0.2mL 0.1M nickel chloride and 0.4mL 50mM chloroplatinic acid dropwise to the above solution, and react for 10min.

[0054] 3. Add 16 mg of XC72 activated carbon to the above solution, stir at 80°C for 5 hours, centrifuge, wash, and dry. The obtained catalyst is denoted as Co 10 @Ni 1 Pt 1 / C.

[0055] Figure 9 for Co 10 @Ni 1 Pt 1 TEM image of / C. Figure 10 for Co 10 @Ni 1 Pt 1 Size distribution diagram of / C nanoparticles. Figure 11 for Co 10 @Ni 1 Pt 1 Cyclic voltammetry and oxygen reduction polarization curves of / C in rotating disk electrode (RDE) test.

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
sizeaaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The present invention relates to a monodisperse platinum iron, platinum cobalt and platinum nickel core-shell catalyst of less than 3nm and application thereof. Specifically, iron, cobalt or nickel metal nanoparticles are first prepared in a solution, then ultra-small core-shell nanoparticles are prepared by using the obtained iron, cobalt or nickel metal nanoparticles, finally the ultra-small core-shell nanoparticles are supported on a carrier to obtain a supported ultra-small core-shell nano catalyst for a fuel cell. A test shows that the oxygen reduction catalytic activity of a monodisperseplatinum cobalt core-shell catalyst of less than 3nm is 7.8 times of that of a commercial catalyst. An ultra-small core-shell electrocatalyst obtained by the preparation method has great applicationprospects in proton exchange membrane fuel cells.

Description

technical field [0001] The invention relates to a preparation method of a monodisperse core-shell nano catalyst for a fuel cell. Background technique [0002] The high cost of proton exchange membrane fuel cells (PEMFC) is still one of the main bottlenecks restricting its large-scale commercialization. Among the materials and components used in PEMFC, platinum-based electrocatalysts and their associated catalytic layers account for more than half of the total cost of the entire cell. The main polarization of PEMFC comes from the slow cathodic oxygen reduction reaction (ORR) rather than the anodic hydrogen oxidation reaction (HOR). Without sacrificing the performance of fuel cells, reducing the amount of platinum (especially the amount of cathode catalyst) is very beneficial to reduce the cost of PEMFC, thereby promoting its commercialization. Therefore, new high-efficiency catalysts need to have high activity and stability. Alloying platinum with other transition metal el...

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): H01M4/92B82Y30/00
CPCY02E60/50
Inventor 邵志刚曹龙生唐雪君秦晓平杨丽梦衣宝廉
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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