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

N, S co-doped metal-free CNS oxygen reduction catalyst and preparation method thereof

A catalyst and metal-free technology, applied in the direction of fuel cell half-cells and primary battery half-cells, electrical components, battery electrodes, etc., can solve the problems of complex preparation process and environmental pollution, and achieve simple preparation process and low cost. Inexpensive, good for large-scale application

Active Publication Date: 2020-11-13
DALIAN UNIV OF TECH
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These templates need to be etched with hydrofluoric acid or sodium hydroxide, which causes environmental pollution and complicated preparation process

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
  • N, S co-doped metal-free CNS oxygen reduction catalyst and preparation method thereof
  • N, S co-doped metal-free CNS oxygen reduction catalyst and preparation method thereof
  • N, S co-doped metal-free CNS oxygen reduction catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: CN 1 S 0.2 -900-2(CN 1 S 0.2 1 in -900-2 means g-C in the raw material 3 N 4 The mass is 1g, 0.2 means the mass ratio of sulfur powder to sodium sulfide is 0.2, 900 means the calcination temperature is 900°C, 2 means the calcination time is 2h)

[0035] 1gg-C 3 N 4 Add to 40mL deionized water, then add 64mg sulfur powder, 280mg sodium sulfide and 200mg glucose, stir for 30min to form a uniform mixed solution A. The mixed solution A was charged into an autoclave, and reacted at 180° C. for 10 h. Then cool to room temperature naturally. Suction filtration, washing, drying in an air oven for 10 hours at 80°C, and then grinding to obtain the CNS catalyst precursor g-C 3 N 4 / CS.

[0036] will g-C 3 N 4 / CS precursor was put into the tube furnace, under N 2 It was calcined under atmosphere for 2 hours, the calcining temperature was 900°C, and the heating rate was 10°C / min. Finally got CN 1 S 0.2 -900-2 Catalyst.

Embodiment 2

[0037] Example 2: CN 2 S 0.2 -900-2(CN 2 S 0.2 2 in -900-2 means g-C in the raw material 3 N 4 The mass is 2g, 0.2 means the mass ratio of sulfur powder to sodium sulfide is 0.2, 900 means the calcination temperature is 900°C, 2 means the calcination time is 2h)

[0038] 2gg-C 3 N 4 Add to 40mL deionized water, then add 64mg sulfur powder, 280mg sodium sulfide and 200mg glucose, stir for 30min to form a uniform mixed solution A. The mixed solution A was charged into an autoclave, and reacted at 180° C. for 10 h. Then cool to room temperature naturally. Suction filtration, washing, drying in an air oven for 10 hours at 80°C, and then grinding to obtain the CNS catalyst precursor g-C 3 N 4 / CS.

[0039] will g-C 3 N 4 / CS precursor was put into the tube furnace, under N 2 It was calcined under atmosphere for 2 hours, the calcining temperature was 900°C, and the heating rate was 10°C / min. Finally got CN 2 S 0.2 -900-2 Catalyst.

Embodiment 3

[0040] Example 3: CN 3 S 0.2 -900-2(CN 3 S 0.2 3 in -900-2 means g-C in the raw material 3 N 4 The mass is 3g, 0.2 means the mass ratio of sulfur powder to sodium sulfide is 0.2, 900 means the calcination temperature is 900°C, 2 means the calcination time is 2h)

[0041] 3gg-C 3 N 4 Add to 40mL deionized water, then add 64mg sulfur powder, 280mg sodium sulfide and 200mg glucose, stir for 30min to form a uniform mixed solution A. The mixed solution A was charged into an autoclave, and reacted at 180° C. for 10 h. Then cool to room temperature naturally. Suction filtration, washing, drying in an air oven for 10 hours at 80°C, and then grinding to obtain the CNS catalyst precursor g-C 3 N 4 / CS.

[0042] will g-C 3 N 4 / CS precursor was put into the tube furnace, under N 2 It was calcined under atmosphere for 2 hours, the calcining temperature was 900°C, and the heating rate was 10°C / min. Finally got CN 3 S 0.2 -900-2 Catalyst.

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
Qualityaaaaaaaaaa
Login to View More

Abstract

The invention discloses an N, S co-doped metal-free CNS oxygen reduction catalyst and a preparation method thereof, and belongs to the technical field of energy materials and electrochemistry. Glucoseis used as a carbon source, g-C3N4 is used as a nitrogen source and a soft template agent, polysulfide is used as a sulfur source, and the three-dimensional porous carbon material catalyst is synthesized through a hydrothermal-calcination two-step method. The obtained CNS catalyst is of a three-dimensional porous graphene-like structure, the surface of the catalyst contains a large number of porestructures, and the ORR of the catalyst has the initial potential of 1.01 V and the half-wave potential of 0.88 V in an alkaline electrolyte and has better catalytic performance than a commercial Pt / C catalyst. The catalyst has a large number of pores, can expose more active sites, is beneficial to transmission of ORR reaction substances, and is beneficial to improvement of ORR catalytic activityof the material. The selected reagents are low in toxicity, wide in raw material source, low in cost, simple in preparation process, green, pollution-free, easy for large-scale production and beneficial to large-scale application. The catalyst can be used in fuel cells, metal-air cells and other acidic and alkaline primary and secondary cells involving ORR.

Description

technical field [0001] The invention belongs to the technical field of energy materials and electrochemistry, and relates to a fuel cell and a metal-air battery oxygen reduction reaction catalyst. Specifically involving a glucose as carbon source, g-C 3 N 4 As N source, polysulfide as sulfur source, N, S co-doped metal-free CNS oxygen reduction catalyst and preparation method are synthesized by hydrothermal-calcination two-step method. Background technique [0002] With the rapid development of society, problems such as energy crisis and environmental pollution are becoming more and more serious. Therefore, there is an urgent need to find new energy and conversion technologies for green and sustainable development. Fuel cells and metal-air batteries have the advantages of no pollution, high theoretical energy density and no noise, and are currently research hotspots. However, the development of fuel cells, metal-air batteries, etc. still faces a common challenge: the slo...

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): H01M4/96H01M4/583H01M12/06H01M12/08B82Y30/00B82Y40/00
CPCH01M4/96H01M4/583H01M12/06H01M12/08B82Y30/00B82Y40/00Y02E60/10
Inventor 李光兰曹硕徐晓存路中发王新
Owner DALIAN UNIV OF TECH
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com