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

hollow ceo 2 Sphere@co-n/c nanocomposite material and its preparation method and application

A nanocomposite material and hollow technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, fuel cells, etc., can solve the problem of high price, stability and methanol tolerance of cathode catalyst platinum-based catalysts Poor performance, hindering commercial application and other problems, to achieve excellent oxygen reduction catalytic performance, good methanol tolerance, and improve the effect of oxygen reduction performance

Active Publication Date: 2021-08-27
ANHUI NORMAL UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, platinum-based cathode catalysts that have a greater impact on fuel cell performance are expensive, and have poor stability and methanol tolerance, hindering their commercial application.

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
  • hollow ceo <sub>2</sub> Sphere@co-n/c nanocomposite material and its preparation method and application
  • hollow ceo <sub>2</sub> Sphere@co-n/c nanocomposite material and its preparation method and application
  • hollow ceo <sub>2</sub> Sphere@co-n/c nanocomposite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The invention provides a hollow CeO 2 The preparation method of the ball@Co-N / C nanocomposite material comprises the following steps: (1) contacting and reacting the heated cerium salt dispersed in the first solvent with polydopamine nanospheres, washing and drying the obtained product, After air gradient calcination, the hollow CeO 2 (2) In the second solvent, the hollow CeO 2 Contact reaction of spheres, cobalt source, and D-(+)glucosamine hydrochloride to prepare hollow CeO 2 spheres@Co-N / C precursor; (3) the hollow CeO 2 The sphere@Co-N / C precursor was calcined under nitrogen atmosphere to obtain the hollow CeO 2 Sphere@Co-N / C nanocomposite.

[0023] Through the above technical scheme, in the present invention, the hollow CeO 2 Contact reaction of spheres, cobalt source, and D-(+)glucosamine hydrochloride to prepare hollow CeO 2 spherical@Co-N / C precursor; the hollow CeO 2 The sphere@Co-N / C precursor was calcined under nitrogen atmosphere to obtain the hollow...

preparation example 1

[0042] CeO 2 Preparation of nanospheres: add 0.5mmol cerium nitrate hexahydrate to 20ml of ethanol, stir at 70°C for 1h for heat treatment, add 0.05g of polydopamine nanosphere solution (containing 5mL of deionized water) after ultrasonic dispersion dropwise and move to room temperature for reaction 16h, washed 3 times, and dried overnight. Then carry out gradient calcination: calcine in air at 550°C for 3h, cool down to 400°C at 1°C / min, and maintain it for 1h, and finally get a white powder that is CeO 2 small ball. Denote it as D1.

preparation example 2

[0044] Prepare CeO according to the method of Preparation Example 1 2 , denoted as C1; the difference is that the cerium nitrate hexahydrate was replaced by an equimolar amount of cerium chloride, and the amount of the polydopamine nanosphere solution was 0.1 g.

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 hollow CeO 2 Sphere@Co‑N / C nanocomposite material and its preparation method and application, including: contact reaction between cerium salt and polydopamine nanospheres, and obtain hollow CeO through air gradient calcination 2 spheres; in the second solvent, the hollow CeO 2 spheres, cobalt source, D‑(+) glucosamine hydrochloride for contact reaction to prepare hollow CeO 2 spheres@Co‑N / C precursor; the hollow CeO 2 The sphere@Co‑N / C precursor was calcined under nitrogen atmosphere. The catalytic performance of the composite material is equivalent to that of Pt and Pt-based catalysts, the catalytic performance is good, and the cost of the catalyst can be reduced, and it has the stability of oxygen reduction catalytic performance and methanol tolerance. The composite material can efficiently catalyze the fuel cell cathode oxygen reduction reaction, and its preparation method has the advantages of greenness, cleanness, high efficiency, simplicity and low cost.

Description

technical field [0001] The invention relates to the field of composite material preparation and oxygen reduction catalysis, in particular, to a hollow CeO 2 Sphere@Co-N / C nanocomposites and their preparation methods and applications. Background technique [0002] With the depletion of energy resources and the aggravation of environmental pollution, fuel cells, as energy conversion and storage devices, have become a research hotspot today. Pt-based catalysts, non-metal-doped carbon-based catalysts, and non-noble metal-doped carbon-based catalysts are all research hotspots. However, platinum-based cathode catalysts, which have a great impact on the performance of fuel cells, are expensive, and have poor stability and methanol tolerance, which hinders their commercial application. It is particularly urgent to study fuel cell cathode ORR catalysts with low price, good stability and methanol tolerance. [0003] The purpose of the present invention is to provide a composite mat...

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 Patents(China)
IPC IPC(8): B01J23/83B01J35/10H01M4/90H01M8/1011
CPCB01J23/83B01J35/0033B01J35/1004H01M4/9016H01M4/9041H01M4/9083H01M8/1011Y02E60/50
Inventor 王银玲王娟张友良李雪范明丽
Owner ANHUI 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

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