Method for preparing graphene based non-metallic oxygen reduction catalyst

A graphene-based, non-metallic technology, applied in graphene, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the limitations of fuel cells, metal-air battery commercialization, poor cycle stability of Pt-based catalysts, obstacles Battery performance improvement and other issues, to achieve the effects of aerobic reduction catalytic performance and stability, good oxygen reduction performance, and a wide range of applications

Inactive Publication Date: 2013-12-11
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the scarcity and high price of Pt resources, this type of catalyst has severely limited the commercialization of fuel cells, metal-air batteries, etc.
Moreover, the cycle stability of Pt-based catalysts is poor, which hinders the improvement of battery 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
  • Method for preparing graphene based non-metallic oxygen reduction catalyst
  • Method for preparing graphene based non-metallic oxygen reduction catalyst
  • Method for preparing graphene based non-metallic oxygen reduction catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Graphene oxide was prepared according to Hummer's (Hummers, W.S. & Offeman, R.E. PREPARATION OF GRAPHITIC OXIDE. Journal of the American Chemical Society 80, 1339-1339 (1958)) method and formulated into a solution with a concentration of about 0.8 mg / ml. Take 10ml of the above solution and put it into a jar, place the jar in a water bath and stir vigorously with a magnetic stirrer, keeping the temperature at 90°C. After 2h, 50ml of sodium sulfide solution with a concentration of 20mg / ml was added dropwise, and stirring was continued at 90°C for 24h. The above solution is centrifuged, washed and dried to obtain the catalyst. The catalyst is in the form of flakes (see image 3 ), containing sulfur element, the content of sulfur element is 2.5mol%. Depend on Figure 5 It can be seen that there is an obvious oxygen reduction peak at about 0.45V, indicating that the prepared catalyst has oxygen reduction performance; Image 6It can be seen that after 1000 cycles, the pea...

Embodiment 2

[0041] Graphene oxide was prepared according to the method of hummer's (Hummers, W.S. & Offeman, R.E. PREPARATION OF GRAPHITIC OXIDE. Journal of the American Chemical Society 80, 1339-1339 (1958)) and formulated into a solution with a concentration of about 0.8 mg / ml. Take 10ml of the above solution and put it into a jar, place the jar in a water bath, and keep the temperature at 90°C. After 2h, 50ml of sodium sulfide solution with a concentration of 50mg / ml was added dropwise, and stirring was continued at 90°C for 24h. The above solution is centrifuged, washed and dried to obtain the catalyst. The catalyst is in block form (see Figure 4 ), containing sulfur element, the content of sulfur element is 1.2mol%. Depend on Figure 7 It can be seen that there is an obvious oxygen reduction peak at about 0.45V, indicating that the prepared catalyst has oxygen reduction performance; Figure 8 It can be seen that after 1000 cycles, the peak intensity and peak position of the oxyg...

Embodiment 3

[0043] Graphene oxide was prepared according to the method of hummer's (Hummers, W.S. & Offeman, R.E. PREPARATION OF GRAPHITIC OXIDE. Journal of the American Chemical Society 80, 1339-1339 (1958)) and formulated into a solution with a concentration of about 0.8 mg / ml. Take 10ml of the above solution and put it into a jar, place the jar in a water bath and stir vigorously with a magnetic stirrer, keeping the temperature at 70°C. After 2h, 20ml of 45wt% ammonium sulfide solution was added dropwise, and stirring was continued at 70°C for 24h. The above solution is centrifuged, washed and dried to obtain the catalyst. The catalyst is flake-shaped and contains sulfur and nitrogen elements. The content of sulfur element is 1.5mol%, and the content of nitrogen element is 2.1mol%.

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 relates to a method for preparing a graphene based non-metallic oxygen reduction catalyst. The graphene based non-metallic oxygen reduction catalyst is a graphene based oxygen reduction catalyst doped with non-metallic hetero-atom, the non-metallic hetero-atom comprises N, S, B and / or I, the method comprises the followings: oxidized graphene is prepared to be oxidized graphene solution with the concentration of 0.1 to 5 mg / ml; at the temperature of 70 to 120 DEG C, the oxidized graphene solution is stirred for 1 to 3 hours and then a reducing agent containing non-metallic hetero-atom is added, the temperature is kept to be 70 to 120 DEG C, stirring is performed continuously for 18 to 48 hours so as to achieve in-situ doping of the non-metallic hetero-atom during graphene reduction-oxidation; centrifugation, washing and drying are performed on the solid so as to obtain the graphene based non-metallic oxygen reduction catalyst.

Description

technical field [0001] The invention relates to a catalyst, in particular to a graphene-based non-metallic oxygen reduction catalyst and a preparation method thereof. Background technique [0002] Energy is an important material basis for developing the national economy and improving people's living standards, and it is also an important restrictive factor that directly affects economic development. With the development of economy and society, the increase of population, and the improvement of people's living standards, energy consumption will increase day by day. At the same time, due to endless mining and excavation, the mineral energy resources that human beings rely on for survival are gradually decreasing, while environmental pollution is becoming more and more serious. Reducing energy consumption, developing new clean energy, and reducing environmental pollution pose major challenges to the development of energy technology. Oxygen reduction reaction is a very importa...

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): C01B31/04B01J27/02B01J27/24H01M4/90C01B32/184
CPCY02E60/50
Inventor 陈立松崔香枝王永霞朱颜施剑林
Owner SHANGHAI INST OF CERAMIC CHEM & 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