Electrolyzed-water catalytic material with nanometer core-shell structure of cobalt sulfide and molybdenum disulfide

A technology of molybdenum disulfide and catalytic materials, applied in the direction of physical/chemical process catalysts, electrolytic processes, electrolytic components, etc., can solve the bottleneck of catalytic activity of single-component materials, slow electron transfer rate, electrocatalytic electrode stability and poor cycle performance and other issues, to achieve the effect of facilitating diffusion and gas desorption, high porosity, good stability and durability

Active Publication Date: 2015-10-14
ZHEJIANG SCI-TECH UNIV
View PDF2 Cites 47 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, there are still many problems in the application of transition metal chalcogenide nanomaterials in the field of electrocatalytic hydrolysis. One is that the improvement of the catalytic activity of single-component materials is approaching the bottleneck; the other is that transition metal chalcogenides a...

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
  • Electrolyzed-water catalytic material with nanometer core-shell structure of cobalt sulfide and molybdenum disulfide
  • Electrolyzed-water catalytic material with nanometer core-shell structure of cobalt sulfide and molybdenum disulfide
  • Electrolyzed-water catalytic material with nanometer core-shell structure of cobalt sulfide and molybdenum disulfide

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] The preparation method of the present invention comprises the steps of:

[0033] 1) The superfine fiber precursor is made into a spinning solution with a mass concentration of 5-15% with dimethylformamide, the precursor of molybdenum disulfide and the precursor of cobalt sulfide are dissolved in the spinning solution, and then The spinning solution is prepared by electrospinning to prepare superfine fibers; during electrospinning, the spinning voltage is controlled at 4-18kV, the distance from the receiving device to the spinning needle is 5-20cm, and the solution flow rate is 0.01mL / min. The superfine fiber precursor is one or more of polyacrylonitrile, polyethyleneimine, polyvinyl alcohol and cellulose. The precursor of cobalt sulfide is one or more of cobalt nitrate, cobalt phosphate, cobalt sulfate and cobalt carbonate. The precursor of molybdenum disulfide is one or more of ammonium tetrathiomolybdate, ammonium molybdate and ammonium heptamolybdate.

[0034] 2) A...

specific Embodiment

[0038] Get 0.15g cobalt nitrate and 0.2g ammonium tetrathiomolybdate and join in 30g polyacrylonitrile / dimethylformamide solution (wherein the mass concentration of polyacrylonitrile is 12%), adopt electrospinning method to this solution then Spinning is carried out, the spinning voltage is controlled to be 4kV, the distance from the receiving device to the spinning needle is 5cm (that is, the receiving distance is 5cm), and the solution flow rate is 0.01mL / min to obtain ultrafine fibers.

[0039] Add 0.5g ultra-fine fiber into the corundum boat, 1g sulfur powder into another corundum boat, both corundum boats are placed in the middle of the tube furnace, and the corundum boat with sulfur powder is at the upstream of the airflow; In air, the temperature was raised to 280°C at 5°C / min and maintained for 6 hours. Then the temperature was raised to 400°C, and the corundum boat containing the sulfur powder was heated to 300°C with a separate heating belt. After opening the argon 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 an electrolyzed-water catalytic material with a nanometer core-shell structure of cobalt sulfide and molybdenum disulfide. The electrolyzed-water catalytic material is composed of a catalytic active material and a carrier, wherein the catalytic active material is a material with the nanometer core-shell structure of cobalt sulfide and molybdenum disulfide; molybdenum disulfide is a shell; cobalt sulfide is a core; and the carrier is ultrafine carbon fiber. The electrolyzed-water catalytic material provided by the invention has high specific surface area and porosity, is favorable for diffusion and gas desorption of electrolyte, has the characteristics of dual functions of hydrogen evolution and oxygen evolution at the same time, and can be directly used as an electrode for electrocatalytic hydrogen preparation without the need of loading onto the electrode.

Description

technical field [0001] The invention relates to an electrolytic water catalytic material, in particular to an electrolytic water catalytic material with a cobalt sulfide and molybdenum disulfide nano core-shell structure. Background technique [0002] Hydrogen production by electrolysis of water is an efficient, convenient and one of the most promising methods for producing hydrogen. The hydrogen production reaction of electrolyzed water occurs on the electrode surface, including two basic half-reactions, the cathodic hydrogen evolution reaction and the anode oxygen evolution reaction. For hydrogen production by electrolysis of water, how to improve the activity of electrode catalytic materials, reduce the overpotential of hydrogen evolution and oxygen evolution, and improve the stability and durability of electrode materials is the focus and key of the research in the field of electrocatalysis. In recent years, there have been more and more studies on the use of transition...

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): B01J27/051H01M4/90C25B1/04
CPCY02E60/36Y02E60/50
Inventor 杜明亮朱罕张明
Owner ZHEJIANG SCI-TECH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap