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

Preparation method for active carbon loaded tungsten carbide nanometer composite powder used as electrocatalyst

A tungsten carbide nano-composite powder technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of high cost and long preparation time, and achieve low cost and high specific surface area , the effect of good conductivity

Active Publication Date: 2019-10-25
HEFEI UNIV OF TECH
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The graphene oxide-supported tungsten carbide prepared by this method has good catalytic performance, but the preparation time is long and the cost is high

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
  • Preparation method for active carbon loaded tungsten carbide nanometer composite powder used as electrocatalyst
  • Preparation method for active carbon loaded tungsten carbide nanometer composite powder used as electrocatalyst
  • Preparation method for active carbon loaded tungsten carbide nanometer composite powder used as electrocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Activated carbon is ball-milled and passed through a 200-mesh sieve; the sieved activated carbon is placed in nitric acid with a concentration of 1mol / L, and activated for 4 hours in an oil bath at 85°C, filtered after cooling, and washed until neutral, 120 Dry at ℃ for 5h to obtain activated carbon.

[0033] (2) Take ammonium metatungstate ((NH 4 ) 6 h 2 W 12 o 40 )0.01mol, activated carbon 12g, ammonium nitrate (NH 4 NO 3 ) 0.24mol, ethylenediaminetetraacetic acid 0.0072mol, and glycine 0.072mol; each raw material powder was dissolved in 50mL deionized water, and magnetically stirred for 8 hours at room temperature to obtain a mixed solution;

[0034] (3) Heating the mixed solution in a muffle furnace at a constant temperature of 200°C for 3 hours to obtain a porous nanoacicular activated carbon-supported violet tungsten precursor powder;

[0035] (4) Place the precursor powder in a tube furnace, and carbonize it at 850°C for 4h in a mixed atmosphere of met...

Embodiment 2

[0038] (1) Activated carbon is ball milled and passed through a 250-mesh sieve; the sieved activated carbon is placed in nitric acid with a concentration of 1 mol / L, and activated for 4 hours in an oil bath at 85°C, filtered after cooling, and washed until neutral, 120 Dry at ℃ for 5h to obtain activated carbon.

[0039] (2) Take ammonium metatungstate ((NH 4 ) 6 h 2 W 12 o 40 )0.01mol, activated carbon 4g, ammonium nitrate (NH 4 NO 3 ) 0.24mol, ethylenediaminetetraacetic acid 0.0072mol, and glycine 0.072mol; each raw material powder was dissolved in 50mL deionized water, and magnetically stirred for 8 hours at room temperature to obtain a mixed solution;

[0040] (3) Heating the mixed solution in a muffle furnace at a constant temperature of 200°C for 3 hours to obtain a porous nanoacicular activated carbon-supported violet tungsten precursor powder;

[0041] (4) Place the precursor powder in a tube furnace, and carbonize it at 800°C for 4h in a mixed atmosphere of met...

Embodiment 3

[0044] (1) Activated carbon is ball milled and passed through a 400-mesh sieve; the sieved activated carbon is placed in nitric acid with a concentration of 1mol / L, and activated for 4 hours in an oil bath at 85°C, filtered after cooling, and washed until neutral, 120 Dry at ℃ for 5h to obtain activated carbon.

[0045] (2) Take ammonium metatungstate ((NH 4 ) 6 h 2 W 12 o 40 )0.01mol, activated carbon 3g, ammonium nitrate (NH 4 NO 3 ) 0.24mol, ethylenediaminetetraacetic acid 0.0072mol, citric acid 0.1mol; each raw material powder was dissolved in 50mL deionized water, and magnetically stirred at room temperature for 8h to obtain a mixed solution;

[0046] (3) Heating the mixed solution in a muffle furnace at a constant temperature of 200°C for 3 hours to obtain a porous nanoacicular activated carbon-supported violet tungsten precursor powder;

[0047] (4) Place the precursor powder in a tube furnace, and carbonize it at 800°C for 3h in a mixed atmosphere of methane and...

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
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method for an active carbon loaded tungsten carbide nanometer composite powder used as an electrocatalyst. The preparation method comprises the following steps: synthesizing an active carbon loaded violet tungsten oxide precursor powder through a liquid phase method, then placing the precursor into a mixed atmosphere of methane and hydrogen, and carrying out carbonization so as to obtain a active carbon loaded nanometer tungsten carbide nanometer composite powder. The nanometer composite powder provided by the invention has high loading efficiency and large loading capacity, realizes uniform distribution of tungsten carbide in the pore channels of active carbon, and can inhibit growth of tungsten carbide crystalline grains; through the porous structureof the active carbon, the specific surface area, transfer ability and stability of the composite powder are improved; and the nanometer composite powder has high oxygen reduction reaction (ORR) catalytic performance and long-term stability.

Description

technical field [0001] The invention belongs to the field of nanocomposite materials, and in particular relates to a method for preparing an activated carbon-loaded tungsten carbide nanocomposite powder used as an electrocatalyst. Background technique [0002] Since the catalytic activity of platinum-like tungsten carbide was discovered in the 1950s, tungsten carbide as a potential substitute for noble metal catalysts has become the focus of academic research. However, according to the current research results, the catalytic activity of tungsten carbide is still far behind that of noble metals such as platinum. One of the main factors restricting the catalytic activity of tungsten carbide is that the specific surface area of ​​tungsten carbide is very small, and it is easy to agglomerate during the preparation process. Some researchers tried to use tungsten carbide as a carrier, and loaded a small amount of noble metal on its surface to improve the catalytic activity of tun...

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): B01J27/22
CPCB01J27/22B01J35/33
Inventor 陈鹏起高宇飞程继贵魏邦争陈闻超高大路徐仙
Owner HEFEI 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