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

Three-dimensional carbon structure loaded GaN catalyst and preparation method thereof

A carbon structure and catalyst technology, applied in the field of three-dimensional carbon structure supported gallium nitride catalyst and its preparation, can solve the problems of low catalytic efficiency, low activity of non-precious metal catalyst, poor stability of non-precious metal catalyst, etc. The effect of improving the performance of electrocatalysts

Pending Publication Date: 2021-12-07
BEIJING UNIV OF TECH
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems of non-noble metal catalysts are as follows: 1. The activity of non-noble metal catalysts is not high, and the catalytic efficiency is low; 2. The stability of non-noble metal catalysts is poor; 3. The energy consumption required by non-noble metal catalysts is higher

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
  • Three-dimensional carbon structure loaded GaN catalyst and preparation method thereof
  • Three-dimensional carbon structure loaded GaN catalyst and preparation method thereof
  • Three-dimensional carbon structure loaded GaN catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 0.5g of carbon nanotubes, 0.5g of graphene, 0.5g of fullerene, and 1g of carbon black to make a uniformly mixed powder, add 10g of 10wt% nitric acid solution to the powder, and stir at 60°C for 5 hours , the resulting mixture was washed with water and suction-filtered and dried at 60°C for 5 hours, and the dried product was ball-milled at 250rpm for 1 hour to obtain a three-dimensional carbon structure powder; the powder was placed in a rotatable ceramic crucible of a plasma-enhanced chemical vapor deposition system, The thickness of the powder is 1mm, the rotation speed of the crucible is 1rpm, and N 2 The gas flow rate is 5 sccm, the radio frequency power is 150W, and the holding temperature is 100°C, and plasma treatment is carried out for 1 hour; 1 g of gallium oxide powder and 0.5 g of activated carbon powder are weighed to prepare a mixed powder, and placed in a microwave plasma chemical vapor deposition system In the crucible, the pre-prepared surface sputt...

Embodiment 2

[0030] Just change the ratio of the three-dimensional carbon structure raw material in step 1 to: 1.5g of carbon nanotubes, 1.5g of graphene, 1.5g of fullerene, and 10g of carbon black to make a uniformly mixed powder, and other conditions remain unchanged, the same as in the embodiment 1. The mass activity of the prepared three-dimensional carbon structure-supported GaN catalyst is 87.4 mA / mg, and its mass activity decays by 23.9% after 10,000 cycles of aging test.

Embodiment 3

[0032] Just change the process in step 1 to: add 10g of 10wt% nitric acid solution to the powder, stir at 80°C for 10 hours, wash the resulting mixture with water and suction filter and dry at 80°C for 10 hours, and ball mill the dried product at 400rpm for 2 hours, Other conditions remain the same, as in Example 1, the prepared three-dimensional carbon structure-supported GaN catalyst has a mass activity of 90 mA / mg, and after 10,000 cycles of aging test, its mass activity decays to 24.6%.

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
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a three-dimensional carbon structure loaded GaN catalyst and a preparation method thereof, and belongs to the technical field of fuel cell catalysts. The method comprises the following steps: 1) carrying out a pretreatment process on carbon-based materials with various structures to obtain three-dimensional carbon structure powder; 2) performing plasma treatment on the three-dimensional structure carbon powder to obtain surface-activated three-dimensional structure carbon powder; 3) preparing a GaN nano material by adopting a microwave plasma chemical vapor deposition system; 4) transferring the GaN nano material to the surface of the foamed nickel electrode, and performing electrostatic adsorption on the three-dimensional carbon structure in an aqueous solution; and 5) annealing the three-dimensional carbon structure adsorbing the GaN nano material to obtain the three-dimensional carbon structure loaded GaN catalyst. The mass activity of the prepared three-dimensional carbon structure loaded GaN catalyst is larger than 100 mA / mgGaN at 0.9 V, and after 10000 circles of aging tests, the mass activity attenuation of the three-dimensional carbon structure loaded GaN catalyst is smaller than 20%.

Description

technical field [0001] The invention belongs to the technical field of fuel cell catalysts, and relates to a gallium nitride (GaN) catalyst supported by a three-dimensional carbon structure and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell is one of the important ways to utilize hydrogen energy. It can realize high-efficiency energy conversion and is a key technical means to replace petroleum fuel. At present, the catalysts used in proton exchange membranes are mostly noble metal catalysts such as Pt and Ir. The earth hinders the large-scale development and utilization of hydrogen energy, so high-performance non-noble metal catalysts have become a current research hotspot. The main problems of non-noble metal catalysts are as follows: 1. The activity of non-noble metal catalysts is not high, and the catalytic efficiency is low; 2. The stability of non-noble metal catalysts is poor; 3. The energy consumption required by non-nob...

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): H01M4/90H01M4/88
CPCH01M4/9075H01M4/90H01M4/8878Y02E60/50
Inventor 王如志杨孟骐
Owner BEIJING 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