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

Non-noble metal diatomic electrocatalyst, and preparation method and application thereof

An electrocatalyst and non-precious metal technology, which is applied in the field of non-noble metal diatomic electrocatalyst and its preparation, can solve the problems of increased surface free energy and poor stability, and achieve the effects of high current density, stable performance and small Tafel slope

Active Publication Date: 2019-05-21
SHANXI UNIV
View PDF15 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, single-atom catalysts with only one single metal site are less stable due to the increase in surface free energy due to the reduction in metal particle size.

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
  • Non-noble metal diatomic electrocatalyst, and preparation method and application thereof
  • Non-noble metal diatomic electrocatalyst, and preparation method and application thereof
  • Non-noble metal diatomic electrocatalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] When the molar ratio of metal tungsten and molybdenum is 3:17. Accurately pipette 4.736 mL of dispersion A and accurately weigh 0.2368 g (NH 4 ) 6 Mo 7 o 24 • 4H 2 O was placed in the dispersion B for ultrasonic dispersion for 4 h, the pH of the solution was adjusted to >6.0, and then the mixture was heated to 190 oC Last for 12 hours. After the reaction was completed, the hydrothermal kettle was cooled, and the product was taken out, and the columnar product was frozen in liquid nitrogen, and then dried for 30 h with a freeze dryer to obtain an airgel. Set the furnace temperature to 800 o C, the gas flow rate is Ar: 150 sccm, NH 3 : 100 sccm, the total gas pressure is 2.85 Torr, after 3 h of reaction, a nitrogen-doped graphene composite anchored by W / Mo diatoms is obtained, W 3 Mo 17 -NG-3h.

[0042] Such as figure 1 Shown, is the (002) and (100) diffraction peaks of the XRD pattern of this material, shows that W 3 Mo 17 -The existence of graphene and the...

Embodiment 2

[0046] When the molar ratio of metal tungsten and molybdenum is 7:13. Accurately pipette 15.98 mL of dispersion A and accurately weigh 0.4281 g (NH 4 ) 6 Mo 7 o 24 • 4H 2 O was placed in the dispersion B for ultrasonic dispersion for 4 h, the pH of the solution was adjusted to >6.0, and then the mixture was heated to 190 oC Last for 12 hours. After the reaction was completed, the hydrothermal kettle was cooled, and the product was taken out, and the columnar product was frozen in liquid nitrogen, and then dried for 30 h with a freeze dryer to obtain an airgel. Set the furnace temperature to 800 o C, the gas flow rate is Ar: 150 sccm, NH 3 : 100 sccm, the total gas pressure is 2.85 Torr, after 3 h of reaction, a nitrogen-doped graphene composite anchored by W / Mo diatoms is obtained, W 7 Mo 13 -NG-3h.

[0047] Such as Figure 4 Shown is the SEM image of the material, which only shows the fluffy wrinkled structure of graphene, and no nanoparticles appear, implying the...

Embodiment 3

[0054] When the molar ratio of metal tungsten and molybdenum is 7:13. Accurately pipette 15.98 mL of dispersion A and accurately weigh 0.4281 g (NH 4 ) 6 Mo 7 o 24 • 4H 2 O was placed in the dispersion B for ultrasonic dispersion for 4 h, the pH of the solution was adjusted to >6.0, and then the mixture was heated to 190 oC Last for 12 hours. After the reaction was completed, the hydrothermal kettle was cooled, and the product was taken out, and the columnar product was frozen in liquid nitrogen, and then dried for 30 h with a freeze dryer to obtain an airgel. Set the furnace temperature to 800 o C, the gas flow rate is Ar: 150 sccm, NH 3 : 100 sccm, the total gas pressure is 2.85 Torr, after 5 h of reaction, a nitrogen-doped graphene composite anchored by W / Mo diatoms is obtained, W 7 Mo 13 -NG-5h.

[0055] Such as Figure 10 Shown, is the (002) and (100) diffraction peaks of the XRD pattern of this material, shows that W 7 Mo 13-The existence of graphene and me...

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 non-noble metal diatomic electrocatalyst, and a preparation method and an application thereof. The catalyst contains, by mass, 1-7 parts of W, 1-7 parts of Mo, 79-81 parts ofC, 4-6 parts of N and 6-8 parts of O. Sodium tungstate and ammonium molybdate which are used as metal precursors and graphene rich in oxygen-containing functional groups undergo hydrothermal self-assembling, then the obtained material is freeze-dried, and a chemical vapor deposition process is carried out in an ammonia / argon atmosphere to prepare the W / Mo diatomic electrocatalyst, which interactswith nitrogen-doped graphene by oxygen atom anchoring. The non-noble metal diatomic electrocatalyst obtained in the invention has an electrocatalytic hydrogen evolution performance, and has the advantages of high activity, low initial potential, large current density, small Tafel slope, stable performances and the like.

Description

technical field [0001] The present invention relates to a non-noble metal diatomic electrocatalyst and its preparation method and application, in particular to an interactive W / Mo diatom composite material anchored in nitrogen-doped graphene by oxygen atoms, its preparation method and Its application in hydrogen production. The invention belongs to the technical field of catalyst preparation and application. Background technique [0002] Energy and the environment are the most important issues involved in the sustainable development of human society. Hydrogen is one of the ideal clean energy sources and an important chemical raw material, which has been widely valued by countries all over the world. So far, hydrogen energy mainly comes from water splitting to produce hydrogen, so how to improve the efficiency of water splitting to produce hydrogen has become a key problem to be solved urgently. For the hydrogen evolution reaction (HER), noble metals have excellent electro...

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): B01J27/24B01J35/10C25B1/04C25B11/06
CPCY02E60/36
Inventor 范修军杨洋董静张献明
Owner SHANXI 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