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

Preparation method of Bi-MoS2 nano composite material for electrocatalytic synthesis of ammonia

A nano-composite material and technology of composite materials, which are applied in the field of electrocatalytic nitrogen reduction electrode materials, can solve the problems of no report on electrocatalytic ammonia synthesis, and achieve the effects of excellent electrocatalytic ammonia synthesis performance, excellent electrochemical activity, and good catalytic activity.

Active Publication Date: 2021-08-06
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned composite materials are mainly used in the field of lithium-ion batteries or photocatalysis, and there is no report on the electrocatalytic synthesis of ammonia.

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 of Bi-MoS2 nano composite material for electrocatalytic synthesis of ammonia
  • Preparation method of Bi-MoS2 nano composite material for electrocatalytic synthesis of ammonia
  • Preparation method of Bi-MoS2 nano composite material for electrocatalytic synthesis of ammonia

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1, the preparation of molybdenum disulfide

[0047] Dissolve 2mmol sodium molybdate dihydrate and 8mmol thiourea in 44ml deionized water, and stir for 0.5h.

[0048] Transfer to a polytetrafluoroethylene stainless steel reaction kettle, seal and keep heating at 200°C in an oven for 24h.

[0049] Naturally cooled to room temperature, washed with deionized water and ethanol four times, and vacuum-dried at 60°C for 12 hours to obtain molybdenum disulfide.

Embodiment 2

[0050] Example 2, Bi-MoS 2 Preparation of nanocomposites

[0051] 10 mg of molybdenum disulfide prepared in Example 1 was completely dispersed in 10 ml of anhydrous ethylene glycol, and after ultrasonication for 2 hours, 5 ml of ethylene glycol solution and 1.4 mmol of bismuth nitrate pentahydrate were added to obtain a mixed solution.

[0052] The mixed solution was vigorously stirred for 12 hours, ultrasonicated for 15 minutes, and then transferred to a polytetrafluoroethylene-lined stainless steel reactor for hydrothermal reaction at 180°C for 16 hours.

[0053] The final product was centrifuged, washed with ethanol for 4 times and dried in vacuum to obtain Bi-MoS 2 nanocomposites.

Embodiment 3

[0054] Example 3, Bi-MoS 2 Preparation of nanocomposites

[0055] 5 mg of molybdenum disulfide prepared in Example 1 was completely dispersed in 10 ml of anhydrous ethylene glycol, and after ultrasonication for 2 hours, 5 ml of ethylene glycol solution and 1 mmol of bismuth nitrate pentahydrate were added to obtain a mixed solution.

[0056] The mixed solution was vigorously stirred for 12 hours, ultrasonicated for 15 minutes, and transferred to a polytetrafluoroethylene-lined stainless steel reactor for hydrothermal reaction at 160°C for 16 hours.

[0057] The final product was centrifuged, washed with ethanol for 4 times and dried in vacuum to obtain Bi-MoS 2 nanocomposites.

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 relates to a preparation method of a Bi-MoS2 nano composite material for electrocatalytic synthesis of ammonia, and belongs to the technical field of nano materials. The Bi-MoS2 nanocomposite takes molybdenum disulfide as a substrate, and bismuth nanocrystals are compounded on the molybdenum disulfide substrate; molybdenum disulfide is used as a substrate, and bismuth nanocrystals and molybdenum disulfide nanosheets are compounded through a hydrothermal reaction. The preparation process is simple and feasible, low in cost and environment-friendly, excellent electrochemical activity can be shown under the condition that precious metal is not utilized, the ammonia yield can reach 15 microgram h <-1 > mg <-1 > cat, and the Faraday efficiency can reach 25%.

Description

technical field [0001] The invention relates to the field of electrocatalytic nitrogen reduction electrode materials, in particular to a main group metal Bi and metal sulfide MoS for electrocatalytic synthesis of ammonia 2 Composite electrode material and preparation method thereof. Background technique [0002] Ammonia plays an important role in production and life. It is widely used in fertilizers, textiles, pharmaceuticals, plastics and other fields. It is one of the most productive inorganic compounds in the world. More than 80% of ammonia is used to make fertilizers. Due to the dipole moment of N≡N and the extremely high bond energy (940.95kJ mol -1 ), which is chemically inert and hinders the process of nitrogen fixation. [0003] In nature, biological N 2 Fixation is carried out by nitrogenase under mild conditions. However, the efficiency is very low and cannot be used in actual production. The industry mainly relies on the Haber-Bosch method in the presence of ...

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): C25B1/27C25B11/091B82Y30/00B82Y40/00
CPCC25B1/00B82Y30/00B82Y40/00Y02P20/133
Inventor 周炎夏菡菡尤紫晗孙凤超王淑涛贾翠萍张军
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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