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

NiFeMoS complex and a preparation method thereof

A complex and precursor technology, applied in the direction of chemical instruments and methods, electrodes, electrolysis process, etc., to achieve the effect of good catalytic performance of hydrogen evolution reaction

Active Publication Date: 2018-11-23
BEIJING NORMAL UNIVERSITY +1
View PDF4 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, LDHs have a layered two-dimensional structure, so they are often used in the confinement synthesis of carbon-based materials. There is no report on the synthesis of molybdenum disulfide using the confinement of LDHs.

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
  • NiFeMoS complex and a preparation method thereof
  • NiFeMoS complex and a preparation method thereof
  • NiFeMoS complex and a preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] Based on the above-mentioned design idea, the preparation method of the NiFeMoS composite body provided by the present invention includes:

[0033] (1) obtain the reactant aqueous solution containing nickel salt, iron salt, molybdenum salt and urea;

[0034] (2) hydrothermally reacting the reactant aqueous solution at 150-170° C. for 8-15 hours, then separating and washing to obtain a complex precursor;

[0035] (3) Calcining and vulcanizing the composite precursor and sulfur powder in an inert gas, the temperature of calcining and vulcanization is 300-600°C, the time of calcining and vulcanization is 0.5-3 hours, and the heating rate is 3-8°C / min .

[0036] The present invention adopts one-step reaction to obtain MoO 4 2- Intercalated NiFe LDH, the Ni and Fe elements in the laminate are evenly distributed, and evenly distributed iron sulfide (FeS 2 ) and nickel sulfide (NiS 2 or NiS). And the ultra-small molybdenum disulfide nanosheets are obtained through the co...

Embodiment 1

[0053] Weigh 0.556g (2.2mmol) of nickel acetate, 0.202g of ferric nitrate (0.5mmol), 0.6g of urea (10mmol) and 0.5g of ammonium molybdate (0.4mmol), add 40mL of deionized water, and stir for 20 minutes to obtain the reactant aqueous solution;

[0054] The reactant aqueous solution was transferred to a 50mL reaction kettle, and hydrothermal reaction was carried out at 160°C for 10 hours. After the system was cooled to room temperature, it was filtered under reduced pressure, the filter cake (crude product of the complex precursor) was washed three times with deionized water, and the obtained product was vacuum-dried at 50°C. Obtain the composite precursor, referred to as NiFe LDH-MoO 4 .

[0055] Use tube furnace for vulcanization, weigh 0.1g NiFe LDH-MoO 4 and 1g of S powder were respectively placed on both ends of the porcelain boat, wherein the S powder was placed in the upwind place, and calcined at 400°C for 2 hours, the heating rate was 5°C / min, and argon gas was conti...

Embodiment 2

[0057] The NiFeMoS composite was prepared according to the method of Example 1, the difference from Example 1 was that the temperature of calcination and vulcanization was 300° C., and the obtained product was designated as NiFeMoS-300.

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 embodiment of the invention provides a NiFeMoS complex and a preparation method thereof. The preparation method of the NiFeMoS complex comprises the following steps: obtaining a reactant aqueous solution containing nickel salt, iron salt, molybdenum salt and urea; carrying out a hydrothermal reaction on the reactant aqueous solution at the temperature of 150 to 170 DEG C for 8 to 15 hours, andthen performing separation and washing to obtain a complex precursor; calcining and vulcanizing the complex precursor and sulfur powder in inert gas at the temperature of 300 to 600 DEG C for 0.5 to3 hours, wherein the heating rate is 3 to 8 DEG C / min. The NiFeMoS complex prepared by the preparation method provided by the embodiment of the invention has high catalytic performance for hydrogen evolution reactions.

Description

technical field [0001] The invention relates to the technical field of hydrogen evolution reaction electrocatalysts, in particular to a NiFeMoS composite and a preparation method thereof. Background technique [0002] Environmental pollution and resource depletion caused by the use of fossil fuels are becoming more and more serious, and people urgently need to develop new energy sources. Hydrogen energy, as a clean and efficient renewable energy, has attracted people's attention. Electrolysis of water is one of the main means of obtaining hydrogen energy, in which a hydrogen evolution reaction (Hydrogen Evolution Reaction, HER) occurs at the cathode. The overpotential of the hydrogen evolution reaction is relatively high, and it is generally necessary to use a noble metal platinum catalyst to reduce the overpotential. However, noble metals are expensive and scarce resources, which limit their application in hydrogen evolution reaction. Therefore, it is necessary to prepar...

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): B01J27/051C25B1/04C25B11/06
CPCC25B1/04C25B11/04B01J27/0515B01J35/33Y02E60/36
Inventor 马淑兰刘晨昱史可人于梓洹
Owner BEIJING NORMAL UNIVERSITY
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